I acquired a homebrew tube FSK demodulator from an eBay estate sale. Probably
a silent key. The seller was in Crawford, Ga.
The photos are at
http://s685.photobucket.com/user/N4BE/library/Mainline%20TT-L%20FSK%20Demodulator
The demod works perfectly as far as I can tell. The photos don’t do it
justice, it was planned and constructed in professional manner by whoever did
it.
This is actually a demodulator based on the design in Oct. 1965 QST Magazine.
There is a brief description at
http://www.rtty.com/development/tu/ttl-fsk/ttl-fsk.htm
My question is does anyone know who the ham might have been who built this? I
asked the estate seller but got no response. I actually built one of these in
1967 when I was a kid, but mine was no where as well built and compact as this.
Brings back a lot of memories.
Jim N4BE
n4be_jim at yahoo.com
Sent from my iPad
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