In a message dated 97-02-21 18:09:17 EST, HeronG@MAILNJ.Dialogic.com (Heron,
George) writes:
>I was involved in some discussions with some QEX (I think) experimenters
>about this over 15 years ago and have since lost track of the subject.
>Had something to do with phase-locked frequency sync of the transmitter
>and received, thus allowing very narrow BW operation.
>
>Thanks.
>
>--George N2APB
>g.heron@dialogic.com
>
Well, about 8-10 years ago "Lowfers" (Low Freq Experimenters) in the 160-190
kHz
1-watt band were experimenting with it. I recall some of them using sync
from nearby TV stations and divider circuits to get their equipment on freq.
TV stations have to be pretty close to freq. On 160-190 KHz there was quite
a QRN problem. Might look in the "Lowdown" (newsletter of the Longwave Club
Of America... someone find the address) for CCW articles.
73, Jay
W6CJ
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