[Elecraft] K2 BFO not oscillating

[Don Wilhelm]

Conway,

Does your counter probe report a frequency reading when plugged into 
TP1?  If so, the probe is working, if not, then your problem is with 
either the probe itself or the Q9 and Q10 circuits on the Control Board.

If (and only if) the probe works in TP1, then do the following - 
otherwise skip the steps below.
Turn your manual to Appendix E page 11 and do the 4 test steps indicated 
at the top of the 1st column.  Then compare the DC voltages during CAL 
FCTR at the leads of Q24 and U11.  If that does not reveal the problem 
for you, tell us what those measurements are an we may be able to help.

73,
Don W3FPR

Conway Yee wrote:
> TP2 reads 0 MHz.
>
> Checking the components involving the BFO, No obvious missing components.
> No obvious cold joints.
>
> I checked the to pads adjacent to L33 which I believe to be the pads to
> the BFO crystal filters (two more are hidden under L33).  With power on,
> the voltages are different making me suspect that I did not short the
> crystals.
>
> The manual tells me that the BFO isn't working or the frequency probe is
> not hooked up (which it is).  It also tells me to go to the
> troubleshooting section.  The table in the section doesn't seem to
> illuminate anything.  The signal tracing part only seems to tell me to
> check the voltages (which are lower than the 0.020 volts).
>
> What do I do?
>
> tnx.
> Conway Yee, N2JWQ
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 9.0.733 / Virus Database: 271.1.1/2657 - Release Date: 01/30/10 02:35:00
>
>