It's interesting using the PowerSDR panadapter to examine signals. I'll often see a strong SSB station with lots of opposite sideband only a little ways down in amplitude. I first wondered if it was my receiver until I looked around and found equally strong stations with no opposite sideband.
Mike - AA8K Tim Ellison wrote:
Just a short QST There were several of us running FLEX-3000s last night on 40m (7.181) @ 0130 UTC that gathered a fairly large round table before propagation changed swiftly we all dropped into the noise. It was really fun to listen to other FLEX-3000s and talking about the radio in general. Particularly interesting is when you start using PowerSDR to record stations over the air and play back their audio. Then other ops (usually non Flexers) start gathering like crazy. Dale WA8SRA actually helped on guy, Don K4ENE, identify and rectify a particularly loud noise on his signal. Using the Panadapter, he was able to identify the interference as being a really annoying 120 Hz peak. Of all things, it was isolated to vibrational noise coming from his AMP being transmitted down the mic boom and into his PR-781 mic. Now try that with a "firmware defined radio". I think we have defined a new branch of science; flextroscopy - characterizing over the air RF signals using an FlexRadio SDR H
I HI.
If there is some interest in making an informal gathering on 40m, we can try to do this several times a week. -Tim ----- W4TME
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