Bob, WB8DDI wrote: "I used Wayne Burdick's article to calibrate my K2. When I first tuned in WWV, the zero beat was at 9999.5. I adjusted c22 & measured TP1(VCO) & TP2(BFO) until the two test points matched. Now WWV zero beats at 10000.5." ---------- 500 Hz is a big error. You can get it much closer. ==========
"Should I have set my dial to 10000.00 & then adjusted C22?." ---------- No! Nothing will change until you do a CAL PLL after adjusting C22. ========== There are a number of methods of getting the 4000 kHz xtal oscillator on frequency by adjusting C22. Without a frequency counter, one of the easiest is to tune in 20 MHz WWV on your IC-756Pro. Use a short piece of flexible insulated wire for the antenna on the 756Pro and bring the end of that antenna near the 4 MHz oscillator in the K2. You'll hear the 5th harmonic of the 4 MHZ oscillator beating with WWV (best to use the AM mode on the 756Pro and wait for those times when WWV is not transmitting a tone). When you hear the heterodyne beat between the 5th harmonic of the K2's 4 MHz oscillator and 20 MHz WWV, adjust C22 to zero beat the heterodyne. Anytime you adjust C22, you must follow with a CAL PLL. Then check your K2's frequency dial readout accuracy. 73, de Earl, K6SE _______________________________________________ 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
