[AMRadio] GR Handbook of Voltage Control

David Knepper cra at floodcity.net
Fri Dec 17 13:15:57 EST 2004

You are a very nice Santa!

Happy Holidays to you and your lovely family.

Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
Nets:  3805 Khz, Monday/Wednesdays 8 PM EDST
          14250 Khz Saturday, 12 Noon EDST

----- Original Message -----
From: "Merz Donald S" <merz.ds at mellon.com>
To: "'Amradio (E-mail)" <amradio at mailman.qth.net>; "'Glowbugs (E-mail)"
<glowbugs at piobaire.mines.uidaho.edu>
Sent: Friday, December 17, 2004 1:07 PM
Subject: [AMRadio] GR Handbook of Voltage Control

Okay, a little spirit of the holidays action here... The Simpson 260 repair
manual I copied for anyone on the list who wanted one a few months ago was
well received. So here's another one you may be interested in.

Same deal: Send me an 8.5 x 11 inch SASE with 4 stamps on it. Then I will
send you a copy of the item described below. There is no need to reserve one
with an e-mail reply or anything like that. I will make just as many copies
as the number of envelopes that show up at my door. The copies will be
reprint-quality, with no-expense-spared (uhhh, yeah...). My address is Don
Merz, N3RHT, 47 Hazel Drive, Pittsburgh, PA  15228. If you write GO
STEELERS! on the back of your envelope, you will also receive a free bonus

This little treasure is a 40-page booklet published in 1963 by General Radio
Company which "designed, patented, introduced and manufactured" the Variac
sometime around 1933. It is titled Handbook of Voltage Control With The
Variac Autotransformer. It is in an 8.5 x x11 format. The booklet contains
12 pages on Theory and Principles, 19 pages on circuits using Variacs and 8
pages on specific Variac applications. All the GR Variac models are
discussed in detail including connection diagrams and so forth. One section
shows how to use Variacs in series and parallel applications (with the use
of a choke to prevent current oscillation when the 2 Variacs' brushes are
not perfectly synchronized). Motor-driven Variacs are also discussed. In
short, this may be all you ever wanted to know (and then some) about the
mighty Variac.

A photocopy is yours free for an 8.5 x 11 inch SASE as specified above.

Happy Holidays.
73, Don Merz, N3RHT

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