[GreenKeys] Mainline TTL FSK Demodulator from 1965

[Jim M.]

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
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