[Elecraft] K2 Finals - Chronic Blow-Outs

[John Magliacane]

Hi Ray.

One possibility might be improper assembly of the transceiver that is causing the transistors to not mate properly with the heatsink on the bottom chassis.

Been there... done that.  :-)

Here's the story behind repeated 2SC1969 failures in my K2 back in 2003, and the mechanics behind the cause:

http://mailman.qth.net/pipermail/elecraft/2003-September/023145.html

http://mailman.qth.net/pipermail/elecraft/2003-September/023307.html

There were never any over-current issues, and it took several transistor replacements before I realized the problem was due to the incorrect placement of the lock washers associated with the 2-D fasteners.

Good luck!


73, de John, KD2BD

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