Ah ............. my first keyer came from Bell Labs! Funny round things in
it. Had 3 leads and a tab on the funny case. Used a mercury wetted relay in
a great big tube like a shot gun shell. Gee, I wish now I had that
schematic! It worked great and was all scavenged from boards at work. I
wonder what I used as a paddle? Don't remember, maybe my bug or a couple of
J-38's base to base and vertical ? Talk about an interesting build, that was
IT !!
The must have been NPN as they were everywhere then if I remember right.
Walt K8CV Royal Oak, MI.
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