[Elecraft] K2 PLL fixed

[Don Wilhelm]

Bob,

I'm glad that you got it working - that was a tough one.
The bottom line message here is that soldering is one of the frequent
failure mechanisms, just behind PTTL (poorly tinned toroid leads).  In case
of a problem, it is wise to check soldering, then check soldering and
finally, check soldering.

73,
Don W3FPR

----- Original Message ----- 
>
> After making the PLL temp mod my PLL would not change frequency in accord
> with the instructions from U5 and U6 on the RF board.  There was something
wrong
> with the digital signals getting to pins 1, 2 or 3 of U5 the DAC.  The
"cure"
> was resoldering everything in sight. But that did not work.  However, when
I
> pulled the front panel board and resoldered everything on it the problem
was
> resolved.  I soldered all connector pins as well as ICs, etc.
>
> The moral to the story is that the toe bone is indeed connected to the
> shoulder bone! If you have a control problem you might broaden your area
of concern
> and resolder everything.
>
> Thanks to Ken, Gary, Michael, Don, Bob and other hams who were kind enough
to
> provide moral support, advice and encouragement. You folks are the best.
>