[Elecraft] K2 alignment and test, part III problem

[Alan Davenport]

Bill, 
 
   I can answer your issue about the key. Make sure you use a STEREO plug. If you use a mono plug it will behave as you describe.
 
    Good luck with your no-power issue. I had the same thing which I eventually tracked down to a solder bridge on the control board. Hang in there.
 
    73 de Al, W2GZN
 

________________________________
 From: William Schmidt <fretjock at hotmail.com>
To: elecraft at mailman.qth.net 
Sent: Friday, March 2, 2012 7:50 PM
Subject: [Elecraft] K2 alignment and test, part III problem
  

I just finished up the RF board and am proceeding to the testing.  Much to my dismay, however, I got no power output when I tried to 
adjust the 40 m BPF.  I'm getting 13.5 v to all of the collectors and I pull 220 ma on receive and 420 ma on tune.
The RF detector resistors and diode are correct and the transformers look good.  
With an RF probe I get zero volts on the xmit mixer output (U10 pin 4).
So I went back further and did some basic voltage checks and found some interesting results.  The key down voltage on the anode of D7 is 
0 v when it should be 8 v.  The anode voltage on D6 is 0.645 v on key down instead of 0 v.  On receive it is 8v.

I'm having some trouble getting my head around how this relates to my lack of output power.  Another symptom I'm having is that the menu and display controls cease to function when I plug in a straight key.  But they work ok with a paddle attached.

I feel a headache starting.  Any suggestions on how to proceed?

Dazed and confused, 
Bill, WV1N
                          
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