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 |
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