AO-7 Mode A transponder question
The Mode B transponder has, due to varying noise and sensitivity, some documented "sweet spots." Mode A, while not as popular, does get some use. Are there any observed equivalent frequencies?
73,
Alan WA4SCA
-----------------------------------
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
George Orwell
Alan, You mention documented "sweet spots" can anybody point out where we can find this information. I saw something on the AMSAT-BB many years ago but never could find that email again.
73, Adrian AA5UK
On Wednesday, September 11, 2019, 12:18:43 PM CDT, Alan via AMSAT-BB amsat-bb@amsat.org wrote:
The Mode B transponder has, due to varying noise and sensitivity, some documented "sweet spots." Mode A, while not as popular, does get some use. Are there any observed equivalent frequencies?
73,
Alan WA4SCA
-----------------------------------
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
George Orwell
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
I would think .940 would be one, that is one area I see/hear people around.
On Wed, Sep 11, 2019, 13:48 Adrian Engele via AMSAT-BB amsat-bb@amsat.org wrote:
Alan, You mention documented "sweet spots" can anybody point out where we can find this information. I saw something on the AMSAT-BB many years ago but never could find that email again.
73, Adrian AA5UK
On Wednesday, September 11, 2019, 12:18:43 PM CDT, Alan via AMSAT-BB <amsat-bb@amsat.org> wrote:
The Mode B transponder has, due to varying noise and sensitivity, some documented "sweet spots." Mode A, while not as popular, does get some use. Are there any observed equivalent frequencies?
73,
Alan WA4SCA
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
George Orwell
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
If you tune the passband, you hear three peaks of noise - at approximately 145.928, 938, and 958. Although some like to avoid them due to noise, they are actually the most sensitive areas of the transponder. 938 is very popular with low power rovers for this reason since a low power signal at low elevation can be much louder there than at the center of the transponder.
73,
Paul, N8HM
On Wed, Sep 11, 2019 at 3:49 PM Don KB2YSI via AMSAT-BB amsat-bb@amsat.org wrote:
I would think .940 would be one, that is one area I see/hear people around.
On Wed, Sep 11, 2019, 13:48 Adrian Engele via AMSAT-BB amsat-bb@amsat.org wrote:
Alan, You mention documented "sweet spots" can anybody point out where we can find this information. I saw something on the AMSAT-BB many years ago but never could find that email again.
73, Adrian AA5UK
On Wednesday, September 11, 2019, 12:18:43 PM CDT, Alan via AMSAT-BB <amsat-bb@amsat.org> wrote:
The Mode B transponder has, due to varying noise and sensitivity, some documented "sweet spots." Mode A, while not as popular, does get some use. Are there any observed equivalent frequencies?
73,
Alan WA4SCA
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
George Orwell
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Thanks for the information Paul!
On Wed, Sep 11, 2019, 16:10 Paul Stoetzer n8hm@arrl.net wrote:
If you tune the passband, you hear three peaks of noise - at approximately 145.928, 938, and 958. Although some like to avoid them due to noise, they are actually the most sensitive areas of the transponder. 938 is very popular with low power rovers for this reason since a low power signal at low elevation can be much louder there than at the center of the transponder.
73,
Paul, N8HM
On Wed, Sep 11, 2019 at 3:49 PM Don KB2YSI via AMSAT-BB amsat-bb@amsat.org wrote:
I would think .940 would be one, that is one area I see/hear people
around.
On Wed, Sep 11, 2019, 13:48 Adrian Engele via AMSAT-BB <
amsat-bb@amsat.org>
wrote:
Alan, You mention documented "sweet spots" can anybody point out where we
can
find this information. I saw something on the AMSAT-BB many years ago but never could find
that
email again.
73, Adrian AA5UK
On Wednesday, September 11, 2019, 12:18:43 PM CDT, Alan viaAMSAT-BB <
amsat-bb@amsat.org> wrote:
The Mode B transponder has, due to varying noise and sensitivity, some documented "sweet spots." Mode A, while not as popular, does get some
use.
Are there any observed equivalent frequencies?
73,
Alan WA4SCA
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
George Orwell
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions
expressed are solely those of the author, and do not reflect the official views
of
AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions
expressed are solely those of the author, and do not reflect the official views
of
AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
Adrian Engele -
Alan -
Don KB2YSI -
Paul Stoetzer