Good evening Group, I seem to be having some trouble with my KPA-100. (K2 serial 4991), Perhaps one of you could shine a light where mine don't reach.
Assembly and initial checks went OK. At the end of the assembly, I ran into the problem. Checks on page 46: Junction of C77 and R11 says 90 to 150 V, I get 11.6 V U4 pin 8 says -5 to -25 V, I get 2.8 mV I have rechecked T3 and all looks well. I was careful with D1 - D8 as I knew they would be hard to check after assembly. Any suggestions before I take the rear panel and heat sink off? (shudder). FWIW: Since the smoke wasn't getting out, I went ahead with the checks on page 46 and the first one on page 47 and all went well, but that's probably inconsequential. I'm sure the problem must be in the bias supply. Thanks, Tom, kj3d _______________________________________________ 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
