Hello Mike, I've seen similar behavior on my K2 when using it with a transverter and power amplifier although it wasn't that bad. I was not able to solve the problem. I did a lot on earthing, wiring or positioning equipment and antenna direction, but it was consistent.
I'm almost sure that it is RF detection at the selection diode of the power potentiometer. Turning the power knob CCW to a certain extend would even INcrease power! I'm all ears to hear how you solve this. 73's, Evert PA2KW -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Short Sent: Monday, June 02, 2008 00:08 To: Elecraft@mailman.qth.net Subject: [Elecraft] K2/100 RF output varies I was recently testing a refurbished SB-200 I am working on. I am using my K2 as the exciter, and had issues on all bands with the K2 remember the power output requested. I have connected everthing as follows: K2/100>>MFJ-993 Tuner in bypass to only show power in and SWR on input circuit of amp, >>SB-200>>LP-100 wattmeter>>1KW dummy load. When I would advance power output from about 10W or so to 70-90W output in to amp, when I take the K2 out of tune mode, and re-enter, the power would be 20W or so until I moved the Power knob a bit, then it would go back to the 70-90W requested. The K2 and the amp are about a foot apart, but the cover is off the amp, since I was doing some input circuit adjustments. Maybe I am getting RF back in to the K2? Mike Short AI4NS [EMAIL PROTECTED] No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.24.4/1476 - Release Date: 5/31/2008 12:25 PM _______________________________________________ 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 _______________________________________________ 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
