Tim Shoppa wrote:
Both the transmitter and receiver are "classic" designs that survived
(with variations) from the 1930's through at least the 1960's ARRL
handbooks. I don't think you'll find an exact copy of
what he built because most of these rigs were truly homebrewed out of
what was available
at the time.

By the 50's and 60's most single-tube transmitters didn't use triodes
like the 809 but used tetrodes like the 1625, the 6146, sweep tubes,
etc. But the principle is the same.

A three-tube regenerative was a very long-lived design as well, Allied
sold their "Space Spanner" and "Ocean Hopper" up through the 1960's I
think, maybe even the early 70's. A google for "three-tube
regenerative" shows up several in this vein using 30's era tubes, for
example:

http://www.qsl.net/wd4nka/TEXTS/REGENf~1.HTM

Tim.

I built a single tube regen using a #19 tube from plans
in a book sold by Lindsay books (www.lindsaybks.com). It's
a surprisingly sensitive radio (using my GAP Titan antenna).
You do need 'phones to hear anything, but I suppose I could have
added an output stage to drive a speaker (maybe using a #33
pentode tube). BTW the #19 is a dual triode, so this radio
is the equal of a two tube set.