I recently got ripped off for a Signal R-535 reciever described as brilliant condition... but actually appears to have been stored outdoors in the garden for 30yrs.
Anyway, it works but I've noticed that if I leave it monitoring a frequency. When I key up the HF rig I get a loud buzzing through the speaker of the airband reciever. None of my other scanners or transceivers do this. I have a pair of amplified speakers in the shack and they don't do it either.
Connecting the metal case of the R-535 to RF ground reduces the buzzing, but doesn't eliminate it entirely.
I'd have thought these recievers would be a bit better shielded than that.
After all the rave reviews I'm not that impressed with this reciever I have to say. It feels quite cheap, more like radio shack own brand £14.99 in 1990 than an expensive quality item. Doesnt help of course that my "brilliant condition" example is actually corroded.
Also, the ticking sound it makes when it scans. Is that normal?
Oh and the on off switch. It clicks when switched on, but then doesn't click when switched off. Is that normal too?