You were right, Don, as usual. The problem was an unsoldered point on the control board. I was looking on the wrong board the whole time. All tests and adjustments on Part II are complete and I'm moving forward. Thanks for all the help!
Ken K0WKM -----Original Message----- From: Don Wilhelm [mailto:[email protected]] Sent: Monday, July 19, 2010 9:06 AM To: Ken Mohler Cc: [email protected] Subject: Re: [Elecraft] K2 BFO problem Ken, You are likely chasing a bad solder connection - things that change by themselves is usually an indication of a solder problem. You are getting close if it was the Q24 drain voltage changing. Check RF Board R98, and then go to the Control Board and check the components shown on the Control Board schematic area marked "ALC" (at the top of the page). Double-check the position of the components soldered on the back of the board. When in CAL FCTR, tapping BAND+ should result in a high voltage on the VALC line, and tapping BAND-, it should drop to zero. Don't forget to check the connectors between the Control Board and the RF Board. 73, Don W3FPR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
