[Elecraft] K2 SSB Problem

[Don Wilhelm]

Fabio,

I cannot be specific, but the most probable area causing that trouble is 
  the area of Q2 and Q3 (those direct the BFO signal either to the 
balanced modulator in SSB mode or back to the RF board for CW) or the 
balanced modulator U5.

Check carefully to be certain diodes D5, D4 and D3 are inserted in the 
proper direction and in the correct holes.

73,
Don W3FPR

iz1dug at libero.it wrote:
> Hi,
> 
> I just finished installing the KSB2 module on my K2 QRP version (full optional).  I go to operate for the first time but when I push the PTT I get this problem:  the current absorbed increases (the voltage decrease) until it exceeds the value 4 A (set at this value after some test) and the K2 switch off.  The current and the voltage values reading on the K2 display and on the multimeter are the same. I have this problem on all band but only in SSB mode (K2 works correctly on CW mode with full power 10-13W). The problem is repeated every time when I push the PTT. 
> I use the microphone Heil MH-2.   
> Any suggestions? 
> 
> Good weekend 
> 
> Ciao,
> 
> IZ1DUG, Fabio
> 
> K2/QRP #1702 and K2/100 #5909