Hi Bob,
I have an A model K2, so R1 was originally installed as a 51K. I removed it and put in a variable and determined on a quiet band, subjectively by ear, where noise with AGC on and off seemed the same. I got different readings each time I did the test, but a mid 40k reading seemed to occur the most often so I went with that. Now trying to see what others got as I'm still not 100% confident. Mike VK1KCK K2 #2599 _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, 6 January 2005 9:45 PM To: [EMAIL PROTECTED] Subject: Re: [Elecraft] AGC Threshold Adjustment by Changing R1 Hi Mike, In the latest revision of the K2 manual version F, 29 January 2004, R1 is given as 50K preset. In the world outside the USA this would indeed equate to 47K. The preset has one end strapped to the wiper so would be a continuously variable resistor from in your case 47K down to zero which is in series with the 5.1K in RP6. The preset apparently normally comes out at somewhere near half rotation or in other words about 23 to 25K. Believe the earlier versions of the K2 had a fixed resistor for R1 selected on test (SOT). Not sure of the start value used, though there seemed to be less emphasis on the adjustment then to what is current now to ensure AGC is fully off with no signal. Seems to have been a few reports recently with the resistor at one end though they did not quote which end to know the value. Regards, Bob, G3VVT K2 #4168 _______________________________________________ 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
