On Mon, 12 Feb 2007, Jack Schmidling wrote:

Michael Black wrote:

And of course, the subject header didn't say it all, since there are
various
reasons someone might be looking for a given year's handbook, but not all
of those reasons actually require the specific year

But if I got that year, I would get what I want.

What I am actually looking for is the article or project on using 813's as
triode modulators. If that expands the editions, so be it.

I can confirm that the 1959 ARRL handbook does NOT have any modulator
using 813s connected as triodes. I have several ARRL handbooks, including
the 1959 edition. One of the guys talked about the Bill Orr "Radio
Handbook". I have only one of the editions, 1956, and it does NOT have any
pair of 813s circuit, triode-connected, for modulators. But, it DOES have
a circuit for triode-connected 807s.



js


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The Thirteenth Edition of the Bill Orr "Radio Handbook" (not the ARRL
handbook) has an article on a 500-watt, 813 modulator with photos,
parts list, and schematic. The next volume I have is the sixteenth
and it only has the schematic and parts list. So, you need something
around the 13th to 16th editions for the 813 modulator article. --Ed