There was another front-cover-of-QStreeT-in-the-'50s 12AU7 keyer called the
"Ultimatic" by a gent named Turrin, W2IMU, who, I think, is still around.
73, Dave, N3HE

"Dave" wrote in message
news.com...
Hi all,

Just acquired a beautifully built late 1950's electronic keyer - I have
seldom seen construction of this caliber.

I'm thinking someone might be able to ID it based on a circuit
description.
I don't have a large vintage library, so I'd like to find out if it
appeared
as a project in QST or Handbook or some other publication....

Unique in that it uses 2 12AU7s plus a 6AS7 as the electronic key
on the output. There is a 'bias' and 'balance' control on the front that
determine the switch characteristics. Oddly, I can make it key my
VOM 'toner' function just fine, but it won't key my old tube code
oscillator. Haven't tried it on a rig just yet - but there are NO relays
in
the output.
The keying output is by the 6AS7 only. There is a neon 'indicator' light
on the front that shows dots and dashes. No sidetone.


Whoever built it even built in a
Vibroplex-esque brass keyer paddle into the base, so it's self contained.

Does this design sound familiar to anyone? Long shot, but who knows...

Dave WB7AWK