Fred, K6DGW, wrote: Mine seems to drift about 450 Hz from cold-start to scheduled QSO time, over maybe 30 mins which is great as far as I'm concerned.
------------------- Is that your K2 that drifts that much or the SX-28? I can imagine the SX-28, but the K2 should not drift more than perhaps 50 to 100 Hz from a cold start at the worst. My K2 starts out about 60 Hz off and is on frequency and stable about 30 minutes later. My HRO-5 receiver stayed on 24/7 too, at least the filament power. Not only did it keep stable that way but it was easier on the tubes and many other parts too, as you know. Of course the HRO-5 had a dial calibrated arbitrarily from 0 to 500. The operator was left to consult a graph of frequency vs. dial reading to determine where to set it for a given frequency. The graph allowed an accuracy of perhaps 25 or 50 KHz! Other means were needed to arrive at the dial setting needed for any higher accuracy. The bottom line, as you know, was that the exact frequency wasn't needed then just as it isn't needed that often for Ham activity today, except to tell where the band or sub-band edges are. Within the bands we looked for clear frequencies, not specific frequencies. If we were listening for someone to call on sked or a net, we knew enough to tune around the approximate frequency where we had expected them, not to look at an exact value. So I don't know that the extra accuracy we have in modern rigs is needed as much as it's simply a by-product of a more stable design. It still doesn't mean much in daily use within the Ham bands. Ron AC7AC _______________________________________________ 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
