Tom, The reason for retightening the screws on the KPA Power Transistors is Elecraft uses plastic insulating heatsink pads. They tend to cold flow a bit under pressure.
Because of the above you should retighten the screws about 2 to 3 days after you first installed them. Operating time is not a factor. 73 Dave KD1NA -Hello group, -I built the 100 watt amp last summer, but can't seem to overcome the urge to stay at qrp levels. -So, as I probably have only a few minutes of time at 100 watts, when should I reset the mounting screws. Is this like 3 months or 3000 miles or is it strictly a matter of time? -Should I just pound out a few hours of tests into a dummy? -Thanks, -Tom _______________________________________________ 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
