In a message dated 6/12/07 6:34:31 PM Eastern Daylight Time, [EMAIL PROTECTED] writes:
> because radios without crystal control drifted badly, which made net > operation > difficult and also made it impossible to assign closely-spaced radio > channels. > I don't think that was the reason for crystal control. The WW2 "ARC-5" HF sets were not crystal controlled, and they were used in net operations. Same for the BC-191/375 and ART-13 sets, and many others. I think the big reasons for crystal control was to eliminate the need for tuning either the receiver or transmitter, and to eliminate the need for a trained radio operator. The BC-611 walkie-talkie is the extreme example. 73 de Jim, N2EY ************************************** See what's free at http://www.aol.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
