U2 on 20m kills 30m.

Keith Maton #1426 OK, here's a good one. I'm running my QRSS grabber on 30m right now and sitting on top of the TS-590 is my U2 kit transmitting WSPR on 20m. When it's transmitting, I totally lose everything on 30m and I get a really strong broadcast station. If I switch the wireless to AM, it's showing +40dB on the LCDometer. Clearly there's some mixing going on there somewhere with a product ending up on my QRSS frequency but I'm not sure exactly what's doing it. It's a shame I've not heard an ident from the broadcast station, it would be nice to know where it's coming from. This is not a complaint, merely an observation. 73 Keith, G6NHU
Tony Volpe #1427 That's quite a typical response for a receiver when it has a strong local signal overwhelming its front end and producing intermodulation products. Even though the UQ is qrp or even qqrp, when it is right next to the receiver, t will put a hell of a big signal into the receiver even if it is adequately screened, it will get in through the coax braid and in other ways, even if it doesn't just get in via the receiver antenna. Just the other day, I received a notch filter for my Freeview TV from the 4G people ?to protect my reception from their new transmissions on 800 mhz. My Freeview channels are around 700 to 780 mhz. They must be going to fire up a 4g transmitter near to my location soon. The problem they are trying to counteract is the same one you have seen happening with your UQ beacon. Tony G0BZB

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