"Dave" ) writes:
The 1961 Handbook shows a simple keyer, with a 12AU7 as the "clock"
and rectifier, and another 12AU7 for the rest of the keyer. A relay
actually keys the transmitter. That seems to be closer to the level
of the keyer the original poster is asking about.

Yes (original poster here) - that's the only handbook I have, and it's
the closest I've found. Could be the original builder devised a way to
key the output with the 6AS7 (which is the size of a 6L6 - he cleverly
recessed the base of the tube into the chassis, below the paddle 'deck').

Makes me want to homebrew again! Just can't get over how well this
thing is built - and it works so doggone perfect I can't believe it! Acts
and looks like it was built yesterday. Of course, it may be just a few
years old built from an old schematic... hard to say.

Anyway, thanks for the input

Dave WB7AWK



But that's the thing. With home made stuff, you can never count on
someone building it just like the article. Obviously, there were some
articles over the years that somehow became highly popular, maybe because
they were intended to be duplicated rather than a write up of something
someone built, but those are the exceptions. I sometimes find it amusing
to see people ask about "a two tube radio that was in one of the hobby
magazines around 1965", because something that generic would have appeared
a whole bunch of times, with different tubes, in different magazines, even
different years, and even because someone wound coils on pillboxes instead
of using Airdux coils.

It's the more complicated things that tend to be unique. And of course
even then, there is no guarantee that someone built it from a magazine
article After all, someone has to build them in the first place before
they get into a magazine, and even then not everything that was built
made it into a magazine, or was a copy of a magazine article.

Use the 1961 schematic to trace the keyer, and maybe you'll find a match.
I know it's often easier to start with assumptions such as that when tracing,
and soon you'll find whether it is the same thing, or close.

Michael VE2BVW