[Elecraft] K2 not able to receive WWV & other signal problems
NQ3RP
john at mcclun.com
Fri Jun 11 06:17:11 EDT 2010
Just a post to tell you about the resolution of my K2 not hearing WWV and
other receiver problems. I was in e-mail contact with Don and after going
through what was going on with the BFO and VFO, he suggested checking the
voltages on U5 pin 7 and there was no voltage there when doing PLL. Which
was strange because I did get a Band plus reading and a - Band reading on
the PLL span test. So we went back to check U5 pins 1,2,3 to U6 on CB. No
continuity from U6 pin 24 to U5 pin 2. I checked the soldering then pulled
U6. Pin 24 was bent over and not making contact.
I then used Spectrogram to set C22 on WWV, did the PLL linearization in
about 4.5 minutes, and set the filters with Spectrogram also. I think this
K2 is the hottest of the 3 I've built.
So I just want to thank Don for sticking in there, giving insight into how
the circuitry works and suggesting the simple things I over looked (like
checking signal continuity!). Now on to the SSB and noise blanker.
Don, you're da MAN!!
73's
John
NQ3RP
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