Thanks Lee and Rick for your suggestions. I solved the problem this morning - I hardly dare admit that it was mostly "technician error"! I decided to check the obvious, and measured the final 20m LO
Steve What about the 10.000 Mhz reference standard? My Omni C receives that frequency and you can use it to zero beat. 73, Marinus, ZL2ML _____________________________________________________________
Marinus, Thanks for the suggestion, but unfortunately that method wont guarantee the separate accuracies of the Local oscillator and the BFO. For example, if the LO was out by 100Hz and the BFO was a
By the way, whilst I was looking at the frequency error problem and the Omni VI was opened up, I took the opportunity to check the Xtal Oscillator adjustments using the PLL pulse width method posted
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 05 Sep 2008 07:38:10 -0600
CHU on 7335 has pretty good accuracy. There may still be a British, continental or Russian version of WWV or WWVH on 5, 10, and 15 MHz with super transmitted accuracy but on HF it takes a month of av
Jerry, Thanks for the info. I made final adjustments this afternoon by fishing out an old GC receiver and using it to receive WWV on 10MHz. I held a piece of wire onto the Omni TCXO divide-by-two chi
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 05 Sep 2008 14:12:10 -0600
That's exactly how its done. HF propagation isn't much better than that if you average doing the same time every day for a month. If the crystal trimmer had finer resolution you might be able to get