On my K3, without a general coverage option, I tuned down below 160 meters and
heard some broadcast stations, and compared the signal strength to another
transceiver I have which has general coverage. In the range of 1400 KHz the K3
copied fine, but when I tuned down around 1200 KHz I couldn't copy anything on
the K3. Seems reasonable, that the 160 filter rolled off down in that range.
Why then can a broadcast station clear down at 940 KHz get through to overload
the front end of the K3?
Come on! This is the receiver, the best in the world, that can copy weak
signals right up next to 60 over 9 contest kilowatts. I can't believe this K3
receiver generates spurs from broadcast stations clear down at 940 KHz. Read
his post - he said an FT-900 and a K2 don't exhibit the problem.
My bet is there is a bad component in the front end somewhere. A K3 should not
crumble in these circumstances.
I think it's time to get out the 8640B signal generator and see for myself what
level it takes to generate 2nd and 4th harmonics like that in a K3. I'll know
within the next 15 minutes. QRX one.........
Rick K2XT
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