[Elecraft] K2 won't come on.

[Don Wilhelm]

Well, the first thing to do is measure the resistance from the collector 
of Q7 or Q8 to ground.  If it is lower than 1.5k, then you have a PA 
transistor problem.  If that is indeed the case, the installation of 
K2PAKIT will likely solve your problem - install Q11 and Q13 too just to 
be safe.  You may not have to send it to Elecraft repair after all.  We 
try to assist to keep the number of support staff repairs at a minimum - 
that is consistent with "you built it, and you can maintain it".  
Unofficial help is available here on the Elecraft reflector, and 
official help at support at elecraft.com.

The base K2 PA transistors are now being supplied as a matched pair, and 
will serve better than a random pair.

73,
Don W3FPR


On 12/27/2011 8:03 PM, kf4clo wrote:
> HI EVERYONE
>    My K2 has been working great for over a year. turned it on this evening
> and the light flashed and the internal fuse blew. I removed all the
> options(100watt,noise blanker and ssb board). hooked a meter to the ground
> and 12v input and have 12v with the k2 on or off. U4 and u5 (regulated power
> supplies on the control board) Nothing. I might have to send it to Elecraft
> but any ideas would be great.
>
>