[Elecraft] K2 BFO problem

[Ken Mohler]

Hi Gang -

 

I'm building my 2nd K2 and am at the point of Alignment and Test, Part II.
All of the tests and alignment steps through the VCO alignment have been
completed successfully.  Everything has been right in the center of the
expected parameters.  Then I got to the BFO test.  I'm getting a reading of
0000.00.  Here's what I know so far:  D37 and D38 are the correct types and
oriented properly.  I have measured the resistance across the resistor
holding L33 down (or up?) and get a reading of 1.5 ohms, indicating to me
that L33 is intact and effectively soldered to the resistor leads.  I have
checked the positioning of Q24 and it looks correct.  The right crystals are
installed at X3 and X4 and grounding the cases went smoothly, so I don't
think I overheated them.  I have reflowed the solder on the parts around the
BFO area.  A symptom that may or may not mean anything: the S-Meter is
showing S5.  It was properly adjusted back in Alignment and Testing Part I.
What should I do next?

 

Thanks for your ideas and suggestions.

 

73

Ken

K0WKM