[amsat-bb] RS-44 VU noise from TX

[Roy Dean]

>
> Now the comment was relating to SDR devices for the RX side, depending on
> what you have, some of these have very poor RF shielding so that in itself
> is a real problem Tom Schuessler, N5HYP
> EM12ms


Just as another data point - I use an $20 RTL-SDR.com V3 Dongle for the
downlinks on almost all the FM and SSB satellites (yep, the plan was always
to upgrade but it's been working so well that I haven't found a huge need
to spend money on a real SDR or traditional receiver).

I have MFJ 916 diplexers at the mast acting as band pass filters.   This
has been working for me on all satellites except for SO-50 and FO-29.   I
can get receiver blowout on the 70cm downlink birds (LilacSat-2 and RS-44,
for example) if I am not careful with my usage of my ARR pre-amps (located
at the antennas) or the SDR gain setting, but ultimately I've had good luck
on those.   SO-50 and FO-29 don't seem to be workable no matter what
combination of pre-amp and SDR gain setting I use.   I haven't had an
opportunity to try out HO-107 yet, so can't comment on my "el cheapo" setup
on that bird.  For SO-50 I just use my D710G, and I haven't had much
opportunity to use FO-29 lately anyway.

--Roy
K3RLD