Re: [amsat-bb] RS-44 VU noise from TX
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
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Roy Dean