[amsat-bb] AO-7 Mode A transponder question

[Don KB2YSI]

Thanks for the information Paul!

On Wed, Sep 11, 2019, 16:10 Paul Stoetzer <n8hm at 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 at 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 at 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 at 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
> > >
> > > -----------------------------------
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> > >
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> > >
> > >
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> > to all interested persons worldwide without requiring membership.
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