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.