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Sangean ATS-909x question
Any owners of this new radio here?
I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona |
Sangean ATS-909x question
On 23 jun, 19:31, rkhalona wrote:
Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand (about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the "HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJS www.tetech.nl Please remove abc in case of using PM |
Sangean ATS-909x question
On Jun 23, 1:53*pm, Wimpie wrote:
On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. Are you talking about the 909? I am referring to the 909x, which was released within the last six months or so. Regards, RK |
Sangean ATS-909x question
On 23 jun, 23:04, rkhalona wrote:
On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Whoops, I was talking about the 909, I missed the "x". With kind regards, Wim PA3DJS www.tetech.nl |
Sangean ATS-909x question
On 23 jun, 23:04, rkhalona wrote:
On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Are you sure you have the channel spacing (9/10 kHz) set correctly for AM broadcast band. If you are living in Europe, it should be 9 kHz mostly. When a station isn't tuned correctly, changing the narrow/ wide switch has little to no effect. With kind regards, Wim PA3DJS www.tetech.nl |
Sangean ATS-909x question
On Jun 23, 2:21*pm, Wimpie wrote:
On 23 jun, 23:04, rkhalona wrote: On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Are you sure you have the channel spacing (9/10 kHz) set correctly for AM broadcast band. If you are living in Europe, it should be 9 kHz mostly. *When a station isn't tuned correctly, changing the narrow/ wide switch has little to no effect. With kind regards, Wim PA3DJSwww.tetech.nl- Hide quoted text - - Show quoted text - Thanks Wim. I live in the USA and the channel spacing is set at 10 KHz. RK |
Sangean ATS-909x question
On 24 jun, 00:23, rkhalona wrote:
On Jun 23, 2:21*pm, Wimpie wrote: On 23 jun, 23:04, rkhalona wrote: On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Are you sure you have the channel spacing (9/10 kHz) set correctly for AM broadcast band. If you are living in Europe, it should be 9 kHz mostly. *When a station isn't tuned correctly, changing the narrow/ wide switch has little to no effect. With kind regards, Wim PA3DJSwww.tetech.nl-Hide quoted text - - Show quoted text - Thanks Wim. *I live in the USA and the channel spacing is set at 10 KHz. RK Hello Ramon, This will definitely improve reception quality. Does this solve the narrow/wide problem also? With kind regards, Wim PA3DJS www.tetech.nl |
Sangean ATS-909x question
On Jun 24, 2:19*am, Wimpie wrote:
On 24 jun, 00:23, rkhalona wrote: On Jun 23, 2:21*pm, Wimpie wrote: On 23 jun, 23:04, rkhalona wrote: On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Are you sure you have the channel spacing (9/10 kHz) set correctly for AM broadcast band. If you are living in Europe, it should be 9 kHz mostly. *When a station isn't tuned correctly, changing the narrow/ wide switch has little to no effect. With kind regards, Wim PA3DJSwww.tetech.nl-Hidequoted text - - Show quoted text - Thanks Wim. *I live in the USA and the channel spacing is set at 10 KHz. RK Hello Ramon, This will definitely improve reception quality. Does this solve the narrow/wide problem also? With kind regards, Wim PA3DJSwww.tetech.nl- Hide quoted text - - Show quoted text - No. The problem I am experiencing is that the narrow/wide bandwidth switch does not cause any difference in audio quality and I want to know if other users are experiencing the same. Thanks Wim. RK |
Sangean ATS-909x question
On 24 jun, 17:58, rkhalona wrote:
On Jun 24, 2:19*am, Wimpie wrote: On 24 jun, 00:23, rkhalona wrote: On Jun 23, 2:21*pm, Wimpie wrote: On 23 jun, 23:04, rkhalona wrote: On Jun 23, 1:53*pm, Wimpie wrote: On 23 jun, 19:31, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Hello Ramon, I have one at hand *(about 8 years old I believe) and changing the narrow/wide switch changes the RF bandwidth on LW, AM and SW. Changing to narrow, reduces the *"HF" part of the audio spectrum (so the tone changes). You may check the operation when listening to a relative weak station adjacent to a stronger one. When changing to wide, you may experience more interference from the stronger station. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc in case of using PM Thanks Wim. *Are you talking about the 909? *I am referring to the 909x, which was released within the last six months or so. Regards, RK Hello Ramon, Are you sure you have the channel spacing (9/10 kHz) set correctly for AM broadcast band. If you are living in Europe, it should be 9 kHz mostly. *When a station isn't tuned correctly, changing the narrow/ wide switch has little to no effect. With kind regards, Wim PA3DJSwww.tetech.nl-Hidequotedtext - - Show quoted text - Thanks Wim. *I live in the USA and the channel spacing is set at 10 KHz. RK Hello Ramon, This will definitely improve reception quality. Does this solve the narrow/wide problem also? With kind regards, Wim PA3DJSwww.tetech.nl-Hide quoted text - - Show quoted text - No. *The problem I am experiencing is that the narrow/wide bandwidth switch does not cause any difference in audio quality and I want to know if other users are experiencing the same. *Thanks Wim. RK Hello Ramon, I hope some other people will add their experience. In my opinion, the audio quality should change, so there may be something wrong with the unit. If it is on wide, you will definitely experience adjacent channel/frequency interference problems, especially when listening to crowded parts of the SW spectrum. With kind regards, Wim PA3DJS www.tetech.nl |
Sangean ATS-909x question
On Thu, 23 Jun 2011 10:31:09 -0700 (PDT), rkhalona
wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona Here's a short review of the 909X although no mention of the bandwidth switch: http://radiojayallen.com/sangean-ats-909x/ Jim(MI) |
Sangean ATS-909x question
On Jun 23, 10:31*am, rkhalona wrote:
Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909X AM/FM/SW Receiver http://www.sangean.com/products/prod...=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909X AM/FM/SW Receiver http://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form |
Sangean ATS-909x question
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Sangean ATS-909x question
On Jun 26, 8:20*am, RHF wrote:
On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. I am looking for other users' experience. My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK |
Sangean ATS-909x question
I have owned two Sangeans before.An ATS 909 and another Sangean that was
AM/FM/TV and Weather.I sent them back to C Crane because they were Crap! cuhulin |
Sangean ATS-909x question
On 06/29/2011 11:12 AM, rkhalona wrote:
Thanks RHF. I am looking for other users' experience. My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK This may be more of a function of the AM station's transmitter. Try tuning off by 1 KHz so you get some sideband splatter. Can you hear cymbals and sibilance, or do you hear crackling and popping? If it's the latter, the station isn't transmitting any highs. See if the bandwidth selector makes a difference while off tuned a little. |
Sangean ATS-909x question
On Jun 29, 2:12*pm, rkhalona wrote:
On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK- Hide quoted text - - Show quoted text - Is there any reason they did not furnish any actual numbers/ specifications ? Their website mentions something like a 'processor filter'(?) . This sounds sort of evasive as far as I'm concerned . And even Sangean doesn't have much information about the static or dynamic bandwih measurements . They must be hiding something . |
Sangean ATS-909x question
On Jun 29, 11:12*am, rkhalona wrote:
On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909X Radio ? Sangean ATS 909X - Modified for Clarity http://www.radiolabs.com/products/re...s-909x-mod.php iwtk ~ RHF |
Sangean ATS-909x question
On Jun 30, 7:05*am, dave wrote:
On 06/29/2011 11:12 AM, rkhalona wrote: Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK This may be more of a function of the AM station's transmitter. Try tuning off by 1 KHz so you get some sideband splatter. Can you hear cymbals and sibilance, or do you hear crackling and popping? If it's the latter, the station isn't transmitting any highs. See if the bandwidth selector makes a difference while off tuned a little. Hi Dave, I have tried that and, as I said above, without detuning you would never know there is a different filter in there, but one should hear a difference when you switch from wide to narrow, without detuning. According to Radio Labs, they have used filter bandwidths of 4.5 KHz and 2 KHz for wide and narrow. A 2 KHz filter should cripple audio fidelity noticeably (and reduce interference), but I am hearing no difference. I have had two other people listen independently and they say the same, so it is not just my ears. I have now read a couple of reviews elsewhere that indicate the bandwidth switch does very little (including the guys at Universal Radio, whom I telephoned), so it looks like a flaw this radio has, including the modified version. RK |
Sangean ATS-909x question
On Jul 1, 2:55*am, RHF wrote:
On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us..asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK |
Sangean ATS-909x question
On Fri, 01 Jul 2011 13:26:39 -0700, rkhalona wrote:
I have now read a couple of reviews elsewhere that indicate the bandwidth switch does very little (including the guys at Universal Radio, whom I telephoned), so it looks like a flaw this radio has, including the modified version. RK I think that you need to get your money returned. |
Sangean ATS-909x question
On Jul 1, 6:36*pm, rkhalona wrote:
On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . A) Tune to a loud,stable AM-modulated station . B) Turn the SSB on . C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . |
Sangean ATS-909x question
On Jul 1, 8:33*pm, wrote:
On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Tune to a local AM/MW Radio Station that features Wide Ranging Audio "Music" and try your Filters. ~ RHF |
Sangean ATS-909x question
On 2 jul, 05:33, wrote:
On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Hello, In my "old" 909, the Wide/Narrow setting only has effect when in AM mode (not LSB/USB). It always uses the narrow filter when in SSB. With kind regards, Wim PA3DJS www.tetech.nl |
Sangean ATS-909x question
On Jul 3, 11:51*am, Wimpie wrote:
On 2 jul, 05:33, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Hello, In my "old" 909, the Wide/Narrow setting only has effect when in AM mode (not LSB/USB). It always uses the narrow filter when in SSB. With kind regards, Wim PA3DJSwww.tetech.nl- Hide quoted text - - Show quoted text - Yep, most receivers work like that . However, 909X potentially may have some serious bugs in software/hardware . |
Sangean ATS-909x question
On Jul 1, 9:00*pm, RHF wrote:
On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Tune to a local AM/MW Radio Station that features Wide Ranging Audio "Music" and try your Filters. ~ RHF *.- Hide quoted text - - Show quoted text - I have now done more extensive testing, mostly in the MW band with lots of different content and interference conditions. There is NO way that they have 4.5 and 2 KHz filters in there. One can hear the slightest difference in some cases, but not enough for the narrow setting to be effective in rejecting interference. This radio is going back. Too bad because apart from this problem, the faulty keyboard (the keys sometimes do not respond to pressing them) and the relatively poor sensitivity (I live the West Coast, weak signal area, so I am sure it performs better in stronger signal areas like the East Coast or in Europe), it is a cool portable suitable for travel. I would give it at most 3 starts out of 5. Sangean has some work to do. Thanks for all the responses. RK |
Sangean ATS-909x question
On Jul 1, 8:33*pm, wrote:
On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious. Thanks for the suggestion. I tried it and there is no difference. Big problem. This baby is going back. RK |
Sangean ATS-909x question
On Jul 3, 9:51*pm, rkhalona wrote:
On Jul 1, 9:00*pm, RHF wrote: On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Tune to a local AM/MW Radio Station that features Wide Ranging Audio "Music" and try your Filters. ~ RHF *.- Hide quoted text - - Show quoted text - I have now done more extensive testing, mostly in the MW band with lots of different content and interference conditions. *There is NO way that they have 4.5 and 2 KHz filters in there. *One can hear the slightest difference in some cases, but not enough for the narrow setting to be effective in rejecting interference. This radio is going back. *Too bad because apart from this problem, the faulty keyboard (the keys sometimes do not respond to pressing them) and the relatively poor sensitivity (I live the West Coast, weak signal area, so I am sure it performs better in stronger signal areas like the East Coast or in Europe), it is a cool portable suitable for travel. * I would give it at most 3 starts out of 5. *Sangean has some work to do. Thanks for all the responses. RK ? The Sangean ATS-909'x' is a DSP Radio; and http://www.grove-ent.com/909x.html maybe the DSP processing function greatly 'negates' the apparent IF Filter operation. ! http://www.universal-radio.com/catal...able/2909.html |
Sangean ATS-909x question
On Jul 5, 3:34*pm, RHF wrote:
On Jul 3, 9:51*pm, rkhalona wrote: On Jul 1, 9:00*pm, RHF wrote: On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean..com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Tune to a local AM/MW Radio Station that features Wide Ranging Audio "Music" and try your Filters. ~ RHF *.- Hide quoted text - - Show quoted text - I have now done more extensive testing, mostly in the MW band with lots of different content and interference conditions. *There is NO way that they have 4.5 and 2 KHz filters in there. *One can hear the slightest difference in some cases, but not enough for the narrow setting to be effective in rejecting interference. This radio is going back. *Too bad because apart from this problem, the faulty keyboard (the keys sometimes do not respond to pressing them) and the relatively poor sensitivity (I live the West Coast, weak signal area, so I am sure it performs better in stronger signal areas like the East Coast or in Europe), it is a cool portable suitable for travel. * I would give it at most 3 starts out of 5. *Sangean has some work to do. Thanks for all the responses. RK ? The Sangean ATS-909'x' is a DSP Radio; andhttp://www.grove-ent.com/909x..html maybe the DSP processing function greatly 'negates' the apparent IF Filter operation. !http://www.universal-radio.com/catal...able/2909.html *. Can you Switch 'Off' the "DSP Decoder IC" and listen to the Radio in 'Analog' Mode ?http://www.ccrane.com/radios/shortwa...ts909X-shortwa... *. Have you first talked to RadLabs about this problem ? -before- Returning the Radio ?http://www.radiolabs.com/products/re...s-909x-mod.php *. *.- Hide quoted text - - Show quoted text - The user has no control over when the decoder IC is engaged. Yes, I have talked with Radio Labs. They think this is normal operation, but I don't see how it can be. RK |
Sangean ATS-909x question
On Jul 5, 3:57*pm, rkhalona wrote:
On Jul 5, 3:34*pm, RHF wrote: On Jul 3, 9:51*pm, rkhalona wrote: On Jul 1, 9:00*pm, RHF wrote: On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious . Tune to a local AM/MW Radio Station that features Wide Ranging Audio "Music" and try your Filters. ~ RHF *.- Hide quoted text - - Show quoted text - I have now done more extensive testing, mostly in the MW band with lots of different content and interference conditions. *There is NO way that they have 4.5 and 2 KHz filters in there. *One can hear the slightest difference in some cases, but not enough for the narrow setting to be effective in rejecting interference. This radio is going back. *Too bad because apart from this problem, the faulty keyboard (the keys sometimes do not respond to pressing them) and the relatively poor sensitivity (I live the West Coast, weak signal area, so I am sure it performs better in stronger signal areas like the East Coast or in Europe), it is a cool portable suitable for travel. * I would give it at most 3 starts out of 5. *Sangean has some work to do. Thanks for all the responses. RK ? The Sangean ATS-909'x' is a DSP Radio; andhttp://www.grove-ent.com/909x.html maybe the DSP processing function greatly 'negates' the apparent IF Filter operation. !http://www.universal-radio..com/cata...able/2909.html *. Can you Switch 'Off' the "DSP Decoder IC" and listen to the Radio in 'Analog' Mode ?http://www.ccrane.com/radios/shortwa...ts909X-shortwa... *. Have you first talked to RadLabs about this problem ? -before- Returning the Radio ?http://www.radiolabs.com/products/re...s-909x-mod.php *. *.- Hide quoted text - - Show quoted text - The user has no control over when the decoder IC is engaged. *Yes, I have talked with Radio Labs. *They think this is normal operation, but I don't see how it can be. RK Then as you say... Back It Goes ! |
Sangean ATS-909x question
On Jul 1, 8:33*pm, wrote:
On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK |
Sangean ATS-909x question
El 06-07-11 1:03, rkhalona escribió:
On Jul 1, 8:33 pm, wrote: On Jul 1, 6:36 pm, wrote: On Jul 1, 2:55 am, wrote: On Jun 29, 11:12 am, wrote: On Jun 26, 8:20 am, wrote: On Jun 23, 10:31 am, wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form . . -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ . . Thanks RHF. I am looking for other users' experience. My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF . .- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . A) Tune to a loud,stable AM-modulated station . B) Turn the SSB on . C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK Hello Ramon, Really strange, as with the "old" 909, the difference is clearly noticable, even with the tone setting on news. They Sangean guys probalby did something weird, as normally you work on "wide" only in case of interference from an adjacent station or noise you switch to the narrow setting to get a readable signal, but with reduced audio quality. I checked it on several stations. Now (00:00h UTC), Radio Havana reaches Netherlands on an indoor antenna (6000 kHz). Did you test it also on a weak (noisy) station? Maybe you can contact a radio amateur to do some measurements on the radio to find out what is the root cause for the behavior. With kind regards, Wim PA3DJS www.tetech.nl Please remove abc first in case of PM |
Sangean ATS-909x question
On Jul 5, 5:09*pm, Wimpie wrote:
El 06-07-11 1:03, rkhalona escribió: On Jul 1, 8:33 pm, wrote: On Jul 1, 6:36 pm, *wrote: On Jul 1, 2:55 am, *wrote: On Jun 29, 11:12 am, *wrote: On Jun 26, 8:20 am, *wrote: On Jun 23, 10:31 am, *wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form * . * . -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ * . * . Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF * . * .- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK Hello Ramon, Really strange, as with the "old" 909, the difference is clearly noticable, even with the tone setting on news. They Sangean guys probalby did something weird, as normally you work on "wide" only in case of interference from an adjacent station or noise you switch to the narrow setting to get a readable signal, but with reduced audio quality. I checked it on several stations. Now (00:00h UTC), Radio Havana reaches Netherlands on an indoor antenna (6000 kHz). *Did you test it also on a weak (noisy) station? Maybe you can contact a radio amateur to do some measurements on the radio to find out what is the root cause for the behavior. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc first in case of PM ? Maybe that is part of the Problem; the "Tone" Switch on the Right Side of the Radio needs to be set a "Music"; for you to Hear an Audio 'difference' between the Wide and Narrow IF Filters ! http://www.universal-radio.com/catal...le/2909rs.html |
Sangean ATS-909x question
On Jul 5, 5:22*pm, RHF wrote:
On Jul 5, 5:09*pm, Wimpie wrote: El 06-07-11 1:03, rkhalona escribió: On Jul 1, 8:33 pm, wrote: On Jul 1, 6:36 pm, *wrote: On Jul 1, 2:55 am, *wrote: On Jun 29, 11:12 am, *wrote: On Jun 26, 8:20 am, *wrote: On Jun 23, 10:31 am, *wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form * . * . -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ * . * . Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF * . * .- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK Hello Ramon, Really strange, as with the "old" 909, the difference is clearly noticable, even with the tone setting on news. They Sangean guys probalby did something weird, as normally you work on "wide" only in case of interference from an adjacent station or noise you switch to the narrow setting to get a readable signal, but with reduced audio quality. I checked it on several stations. Now (00:00h UTC), Radio Havana reaches Netherlands on an indoor antenna (6000 kHz). *Did you test it also on a weak (noisy) station? Maybe you can contact a radio amateur to do some measurements on the radio to find out what is the root cause for the behavior. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc first in case of PM ? Maybe that is part of the Problem; the "Tone" Switch on the Right Side of the Radio needs to be set a "Music"; for you to Hear an Audio 'difference' between the Wide and Narrow IF Filters !http://www.universal-radio.com/catal...le/2909rs.html That's not it. I always keep the radio on the "music" tone setting, as this gives the best audio fidelity. RK |
Sangean ATS-909x question
On Jul 5, 5:47*pm, rkhalona wrote:
On Jul 5, 5:22*pm, RHF wrote: On Jul 5, 5:09*pm, Wimpie wrote: El 06-07-11 1:03, rkhalona escribió: On Jul 1, 8:33 pm, wrote: On Jul 1, 6:36 pm, *wrote: On Jul 1, 2:55 am, *wrote: On Jun 29, 11:12 am, *wrote: On Jun 26, 8:20 am, *wrote: On Jun 23, 10:31 am, *wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form * . * . -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ * . * . Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF * . * .- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK Hello Ramon, Really strange, as with the "old" 909, the difference is clearly noticable, even with the tone setting on news. They Sangean guys probalby did something weird, as normally you work on "wide" only in case of interference from an adjacent station or noise you switch to the narrow setting to get a readable signal, but with reduced audio quality. I checked it on several stations. Now (00:00h UTC), Radio Havana reaches Netherlands on an indoor antenna (6000 kHz). *Did you test it also on a weak (noisy) station? Maybe you can contact a radio amateur to do some measurements on the radio to find out what is the root cause for the behavior. With kind regards, Wim PA3DJSwww.tetech.nl Please remove abc first in case of PM ? Maybe that is part of the Problem; the "Tone" Switch on the Right Side of the Radio needs to be set a "Music"; for you to Hear an Audio 'difference' between the Wide and Narrow IF Filters !http://www.universal-radio.com/catal...le/2909rs.html That's not it. *I always keep the radio on the "music" tone setting, as this gives the best audio fidelity. RK Asked and Answered. |
Sangean ATS-909x question
On Jul 5, 7:03*pm, rkhalona wrote:
On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK- Hide quoted text - - Show quoted text - So when in SSB mode a 'narrow' filter is functional ? Or it is just like the one in AM ? |
Sangean ATS-909x question
On Jul 5, 9:53*pm, wrote:
On Jul 5, 7:03*pm, rkhalona wrote: On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK- Hide quoted text - - Show quoted text - So when in SSB mode a 'narrow' *filter is functional ? Or it is just like the one in AM ?- Hide quoted text - - Show quoted text - When you are in SSB mode, only the narrow filter is operational. RK |
Sangean ATS-909x question
On Jul 6, 8:18*pm, wrote:
On Jul 6, 12:14*pm, rkhalona wrote: On Jul 5, 9:53*pm, wrote: On Jul 5, 7:03*pm, rkhalona wrote: On Jul 1, 8:33*pm, wrote: On Jul 1, 6:36*pm, rkhalona wrote: On Jul 1, 2:55*am, RHF wrote: On Jun 29, 11:12*am, rkhalona wrote: On Jun 26, 8:20*am, RHF wrote: On Jun 23, 10:31*am, rkhalona wrote: Any owners of this new radio here? I am wondering if you are hearing any (audible) difference when you switch between the wide and narrow bandwidth settings in AM mode. Thanks for your answers. Ramon Khalona "RK", Go Here for the Sangean Company webpage for the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/products/products_main.asp?pid=71&pan=9&um=3 -has-down-loads-for- * Manual PDF -note- Read Page 32 "Switch Setting" : AM Narrrow / Wide -says- The Filter Switch works NW in the AM Mode -and- Is Always Narrow in SSB Mode * Specification PDF * Flyer PDF Call/Contact Sangean USA and ask then the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.sangean.com/contact_us/contact_us.asp?um=5 INFO : Phone + eMail + On-Line 'Web-Request' Form *. *. -alternative- Radio Labs Support may be able to answer the Question as to the Band-Widths of the AM Mode Wide and Narrow Filters in the Sangean ATS-909XAM/FM/SW Receiverhttp://www.radiolabs.com/support/ *. *. Thanks RHF. *I am looking for other users' experience. *My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. *I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK RK, If you have a Very W-I-D-E 'Wide' IF Filter +8 kHz and a not-so-wide 'Wide' IF Filter ~4 kHz you may NOT hear or detect too much difference between the two when it comes to AM-Mode Radio Reception. However, If you have a Standard 'Wide' IF Filter ~5 kHz and a Narrow IF Filter -3 kHz you may well Hear a/r Detect some real difference between the two when it comes to AM-Mode Radio Reception. What "kHz" and "Shape Factor" Rad-Labs 'claim' for their Wide and Narrow IF Filter in the Mod'ed Sangean ATS-909XRadio ? Sangean ATS909X- Modified for Clarityhttp://www.radiolabs.com/products/receivers/ats-909x-mod.php iwtk ~ RHF *. *.- Hide quoted text - - Show quoted text - Hi RHF, Radio Labs claims they have used 4.5 KHz for wide and 2 KHz for narrow. *As I said in my response to Dave, one should be able to hear the difference between these pretty easily (for reference, my Drake SW8 has 6, 4 and 2.4 KHz bandwidths, and one can hear the difference between all three pretty well, especially in going from the middle to the lowest bandwidth because the narrowest filter muffles the audio distinctly). * I just wanted to hear about other users' experience, wether they have the stock or modified radio. Thanks for your reply. RK- Hide quoted text - - Show quoted text - You can try this simple test I just thought of . * A) Tune to a loud,stable AM-modulated station . *B) Turn the SSB on . *C) Play with USB/LSB setting . D) Detune the received frequency slightly ( no more than 1-2 KHz) ,so you hear the beat sound increasing or decrease in the pitch . *E) Play with the wide/narrow setting . F) If the filters are really there- -the change must be very obvious .- Hide quoted text - - Show quoted text - Hi there again, The reason this test does not work with this radio is that in SSB mode, the radio is automatically set to the narrow bandwidth and the switch becomes inoperable, hence there is no difference. *However, when you tune to a strong station in AM mode on narrow and then detune by several KHz so that the station is inaudible and you switch to wide, the station is audible again. *This suggests the switch is working, but the bandwidths used are not that different to make for an audible difference. *Several users of the stock radio have reported similar behavior (i.e., not much difference between wide and narrow bandwidths). Thanks again for your suggestion. RK- Hide quoted text - - Show quoted text - So when in SSB mode a 'narrow' *filter is functional ? Or it is just like the one in AM ?- Hide quoted text - - Show quoted text - When you are in SSB mode, only the narrow filter is operational. RK- Hide quoted text - - Show quoted text - I see . If that is the case,then the AM mode has a problem switching from 'Wide'-to-'Narrow' filter.May be Radiolabs (or the actual manufacturer somewhere in PRC) had a QC issue . Who knows . New product , new questions . . .- Hide quoted text - - Show quoted text - I think this was a design choice and it is described in the user's manual (I am told the Sangean 909 works the same way). On most radios I have, the bandwidth selection is independent of listening mode. The Drake SW8 and R8B are exemplary in this regard, but they were much more expensive rigs. RK |
Sangean ATS-909x question
On Thursday, June 30, 2011 5:05:47 PM UTC+3, dave wrote:
On 06/29/2011 11:12 AM, rkhalona wrote: Thanks RHF. I am looking for other users' experience. My unit comes from Radio Labs, with the filter upgrade (their so-called, "Clearmod" modification). The difference when I switch from AM wide to narrow is almost always inaudible and, for all practical purposes, does not make any difference without detuning the radio in slow mode. I wonder if owners of the stock radio experience the same. (The Radio Labs people think this is the way the radio is supposed to work, which I found puzzling and surprising) RK This may be more of a function of the AM station's transmitter. Try tuning off by 1 KHz so you get some sideband splatter. Can you hear cymbals and sibilance, or do you hear crackling and popping? If it's the latter, the station isn't transmitting any highs. See if the bandwidth selector makes a difference while off tuned a little. I don't know how I am able to post w/t registering but here is my experience with the modified one: I saw no difference between wide and narrow settings, so I tuned in a SW station while two more stations were 5kHz on both sides of it. I then noticed a difference but it was minimal. A person with a little hearing problem or in a noisy environment will not hear any difference. I was surprised and I wonder of the RadioLabs mos have caused it. |
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