Hi Greg, Congratulations on building K2 S/N 6100.
I built the EC2/KPA100/KAT100. The rig operates the same as if the KPA100 was installed in the K2. It is a great feature to be able to quickly disconnect the K2 from the EC2/KPA100/KAT100 to take just the K2 to the field for outside QRP operation. I have the KAT2, Battery option and auxiliary interface built in the K2 cover. There are excellent instructions posted by Lyle KK7P and John KI6WX on the Internet to show how it is done. When the EC2/KPA100/KAT100 is attached to the K2 and the power level is set below 11 Watts the amplifier is bypassed and goes through the KAT100 for tuning. The KAT100 shows this mode the Low power indicator led is on. As Don W3FPR suggested, it is best to build and complete the K2 and KPA100 together and when all tests are complete separate the KPA100 to prepare it for installation in the EC2. I decided to build my own auxiliary interface from ideas posted by KK7P and KI6WX to do this without the KIO2 since I did not need the RS-232 function because I was not interested in connecting the K2 to a computer. The only consideration is that if you do not have the KAT2 you may need a QRP antenna tuner for field use if you do not operate into a resonant antenna with a 50 Ohm load. GL 73, Bob Johansen WB2SRF K2 S/N 5622 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
