I’ve noticed that with the gain at 42.1 I get aircraft at the view limit at RSSI around -18, which is okay, and I also get occasional aircraft listed at -49.5 RSSI, which is an anomaly. If I increase the gain to 43.9 and above I never see that anomaly so that’s the lowest I’ll go at this site as it stands.
I’m re-imaging the card shortly to get back to a clean setup. I’m going to leave the gain at 43.9 for a week and see how that pans out in terms of range and aircraft.