I’ve built a ~140 MHz VHF turnstile. When I connected it to my RTL-SDR and started GQRX, I had a great signal from e.g. NOAA-19, which completely suppressed noise. I then shortened the coax from 12 meters to 2 meters, and connected it to my satnogs station. Now, my satellite signals are hiding in the noise. I first tried with the default gain - I think that’s zero. I then increased to 25.4 dB - exactly same result. Now, I’m trying 49.6 dB gain, to see if that helps.
In GQRX, I can choose LNA gain (I don’t have an LNA, though), OR click “Hardware Gain”. Can I enable hardware gain in satnogs?