I just bought K2 s/n 3641. It's in good shape, but suffers from the dreaded 'low audio'. Sidetone volume is loud enough - I wouldn't like to operate at 255, but it wouldn't drive me from the room, either (might damage my hearing with headphones).
I decided to go through the alignment instructions, both to see if I could find a problem and to familiarize myself with the rig. I found that the AGC voltage threshold setting was a little low, so I corrected that (page 46 in my rev E manual) - about 3.36v, I changed to 3.8v. The displayed voltage is 13.2v for input of 13.8v; I expect 0.2v drop across the diode (indeed, I measure 13.6v there). I guess this is within 5% of 13.6, but it's a little disappointing :-) The PLL Ref Oscillator Range Test went OK, but my range came out to be 13.38 KHz, outside the stated 9.8-13 KHz range. Looking through the reflector archives, it appears that an upper range of 15 KHz is more suitable, post-temperature compensation circuit (which I believe this has - the s/n is late enough, past 3446). Just want to confirm that - should I bother to diddle the turns on T5, as Don W3FPR suggested? 73 de chris K6DBG P.S. I was a little surprised when the VFO Linearization display jumped from the 40m band that I had selected according to the directions, to the 12MHz range ... it seemed to work OK, but ... _______________________________________________ Elecraft mailing list Post to: [email protected] 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
