"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"
Thanks for the explanation! Since completing my KPA100 I've wondered why the tightening-after-first-extended-use is necessary but doesn't need to be repeated. I tightened mine after a few hours of contesting and no subsequent tightening has been necessary. It makes sense now--the screws need tightening because a new gap is created between the transistor cases and the heat sink after the heat sink material melts. Just one more piece of information about what goes on under the hood of my K2/100. 73, John, N7ON K2/100 S/N 5023 P.S. 500+ K2's sold since receiving mine last July? FB! _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
