24 May
2020
24 May
'20
9:09 a.m.
It's funny, I tried RS-44 for the first time yesterday and had the exact same problem. My SDR even picked up the harmonic when the coax connected to it was 50 ohm terminated, so my duplexer was not providing enough filtering. The solution will likely be a front-end filter attached directly to the device.
-Stephen, N8URE