W3FPR - Don Wilhelm wrote:
Vic,
OK, I will venture a guess ---
You might want to check for a large signal in the shack from 11.5 to
11.7 MHz - like in a computer for instance, oscillators near 12 MHz are
common in computers, and the frequency may depend on what is going on
inside the computer.
I didn't believe you, because the signal is there with no antenna. But I
decided to check some things. When I turned of the shack computer, the spur
didn't disappear...but it got weaker! Hmm, what could that mean? I then
disconnected the interface cable from the K2 which goes to the KAT100, the KRC2,
and the computer (I like gadgets). It disappeared! AHA! Now I reconnected it
and tried disconnecting just the KRC2 -- bingo, all gone. The oscillator in the
KRC2 must be sending a strong signal into the K2 via the interface cable.
By the way, I did do the 17 meter EU BC mod some time ago because I had a
similar problem due to large SWBC signals.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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