[Elecraft] Question about K2's Q7 and Q8 Final Amp

[Terry Bassett]

On Monday 04 October 2004 08:16, redmen1969 at optonline.net wrote:
> Hi,
>
>   My K2 has been working fine but I decided to fix it anyway...hi.
>
  The K2 manual warns that whenever the heat sink is
> removed and replaced you should verify that the collectors of Q7 and Q8 are
> not shorted to ground.
>

> Tom, WB2QDG
> K2 1103

Hello Tom,

	The way I blew one of mine was due to a very tiny fragment of metal shaving 
getting  installed along with the heat transfer pad of Q7, I took only a very 
short time to let the smoke out.  
	This happened quite some time back, so I can't remember what I was doing or 
trying to accomplish, but I'd say if you've done anything to Q7/Q8 and can't 
find the short to ground.   It "might" be something like what I did.  Believe 
me it was a tiny, tiny fragment, but when Q7 was tightened down it made 
contact and did its damage.

	Just a bit of my experience that you can check and maybe gain from.

73,

Terry  KA9TXE