[Elecraft] K2 - 40m transmit problems

[Don Wilhelm]

Zac,

For the bad voltages on Q19, look carefully for a bad solder connection 
on RFC14 (poorly tinned toroid lead perhaps?) and/or R20.   The 
resistance measurement from Q19 source to ground should be close to 270 
ohms.  Note that this condition may or may not be related to your HiCur 
situation.

As for the HiCur message - is that message present when transmitting 
into a dummy load?  Does it occur at all power levels?  Is this the base 
K2 only or does it have the KPA100 installed?  Do you have the KAT100 
also?  If you have the KPA100, has it been updated with the KPA100UPKT - 
if updated, was C31 changed to 0.22 uf during the upgrade?  Many 
questions that I must know before venturing an intelligent comment.

73,
Don W3FPR

Zac Brown wrote:
> I'm getting HiCurr messages when I transmit on 40m, the bargraph shows 
> multiple bars lit, and I can hear a very faint squealing sound coming 
> from the K2 when I transmit.  I've built the RF probe and I'm going 
> through the signal tracing steps in the manual.
>
> On the PLL Reference Oscillator steps (appendix E, page 10) I am 
> measuring U4 pin 1 at 0.252 V.  The signal tracing instructions say 
> that it should be 0.8-1.8 vrms.  I then started looking at Q19 and am 
> measuring G=1.0, S=-1.0, D=8.0 with my DMM.  According to the DC 
> voltage tables, I should be seeing G=0, S=0.8, D=8.0.
>
> Any advice on where I should look next?
>
> Thanks,
>