When I upgraded from my K3 to a K3s, I took the opportunity to order a 10 MHz Ref In option.
I finally got around to hooking it up to a Leo Bodnar GPS receiver I picked up at Dayton a year ago, and now the K3s is rock solid spot on frequency. Don't know how i did without it all these years... 73, -- Dave, N8SBE -------- Original Message -------- Subject: Re: [Elecraft] Auto-spot, tuning aids, and the arcane history of CW pitch-matching From: Bob McGraw K4TAX <[email protected]> Date: Tue, January 22, 2019 3:14 pm To: [email protected] Another trick which works well. Tune to a WWV frequency in CW mode. Press SPOT and the radio will jump on the exact carrier frequency. The SPOT function can pull on to the WWV frequency as far away as about 100 Hz. Once the radio has resolved SPOT, the readout / display is the frequency of WWV +/- the error in Hz. Thus the readout of 9.999.992 is indicating being 8 Hz low. From a cold start, FP being 19°C, I find -8 Hz error on 10 MHz WWV. After about 15 minutes the FP is 25°C and the error is -1 Hz. I've tweaked the REF CAL such that after 1/2 hr. in receive tuning to WWV from both higher and lower will produce a reading of 10.000.000. Will all stations pse QNZ QNN. 73 Bob, K4TAX ______________________________________________________________ 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 Message delivered to [email protected]
