[GreenKeys] Mainline TTL FSK Demodulator from 1965

[Jim M.]

The photo link in my initial posting may have been corrupted.  Here it is again:
http://s685.photobucket.com/user/N4BE/library/Mainline%20TT-L%20FSK%20Demodulator?sort=3&page=1
Really a blast from the past.
Jim N4BE



Message: 1
Date: Tue, 18 Jun 2013 17:20:25 -0700 (PDT)
From: "Jim M." <n4be_jim at yahoo.com>
To: "greenkeys at mailman.qth.net" <greenkeys at mailman.qth.net>
Subject: [GreenKeys] Mainline TTL FSK Demodulator from 1965
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    <1371601225.12530.YahooMailNeo at web142706.mail.bf1.yahoo.com>
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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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