[Elecraft] KPA100 Problem; scratched thermal pads OK

[Eric Swartz - WA6HHQ, Elecraft]

Minor scratches are OK. This material melts and fills the gaps between 
the PA transistors and the heatsink as the devices heat up the first 
couple of times. (That is one of the reasons we require tightening of 
the transistor mounting screws after a initial short period of use.)

73, Eric   WA6HHQ
Elecraft
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Harvey Howell wrote:
> While working on the amp I noticed that the black coatings on the 
> thermal pads seem to scratch easily. Mine have a couple of minor 
> scratches that go thru the black. Does this reduce their ability to 
> conduct heat away? Should I replace them? Thanks.
>