10m, 20m, 40m, and 160m up and running with a U3S

1 post / 0 new
NE5U's picture
Last seen: 1 year 8 months ago
Joined: 2015/08/11 - 03:45
10m, 20m, 40m, and 160m up and running with a U3S

I finally have the U3S up and running with 10m, 20m, 40m, and 160m at 200mW into a really crappy dipole in the attic. The antenna was resonant at around 9 Mhz when I checked it without the feed line. I am feeding it with 75Ω coax for now. When my balun arrives I'll work on tuning it to one of the bands. The U3S has the OCXO and relay board. When the case arrives I'll set the oven temp. For now it is off.

On the listening side of things, I'm not having much luck with the WSPR software, SDRPlay radio, and Virtual Audio Cable. Rx Noise in the WSPR software is constantly -30dB. If someone can recommend a way for WSPR to "communicate" with my SDRPlay I'd appreciate it. When I am running SDR# and the U3S starts to transmit I can hear it in SDR#.

Between my spectrum analyzer and SDR# I'm confident that the U3S is doing the best it can with the poor antenna situation. I'd like to be able to receive though.