[ARC5] GB> ARC-5 transmitter linear?

[Roy Morgan]

On Oct 24, 2009, at 9:55 PM, David Bock wrote:

> Thanks!
>
> I do recall that linear. I will look it up but I am more interested  
> in not
> doing anything but use an ARC-5 transmitter.
>
> Dave W8OHS

I found references to what you are looking for, I think, in my notes  
files (I was looking for the article about the modified 1625 tubes.)  
(I don't know what "FTBO" means.. do you?)



837Linears.txt
 From K1LKY

From: "Garey Barrell" <k4oah at mindspring.com>
To: <ak0b at swbell.net>, <glowbugs at piobaire.mines.uidaho.edu>,
    "William R Colbert" <w5xe at juno.com>
Subject: Re: GB> 837 Tube features and questions
Date: Sat, 21 Jun 2003 15:48:07 -0400


Ray -

QST for March 1956 has an article "Cheap and Easy SSB", by Anthony
Vitale, W2EWL on a mobile SSB transmitter converted from a BC-458.
This article is mostly about the SSB conversion, using the set of
transformers that he offered for $7.95.  This circuit was originally
published in GE Ham News for November-December 1950.  I believe he was
credited with the "invention" of the 9 MHz phasing SSB generator with
a 5 MHz VFO for 75 and 20M coverage.  I also seem to recall that this
circuit was what was later sold as the 10A transmitter by Central
Electronics.

In this article, however, he mentions his "current" mobile rig which
uses this exciter with one of the 1625 finals removed, to drive a
single 837 which drives four G-G 837's in the trunk!  There are no
other references, typical of QST in those days, a result of the NIH
(Not Invented Here) policy!

FBTO comes up with no less than three 837 based linear amps, of three,
four or five tubes!

"Four 837 Tube Linear", CQ Magazine, June 1966, pp. 28

"Table Top Linear using Five 837", CQ Magazine, January 1959, pp. 50

"Three 837 Tube 1 KW Linear", CQ Magazine, February 1956, pp. 26.

73, Garey - K4OAH
Atlanta

----- Original Message -----
From: "William R Colbert" <w5xe at juno.com>

 >
 > The latter mentioned rig was a converted ARC 5 to
 > linear by W9NTI, entitled 'The 200L/ARC5, used
 > a pair of 837's - not 4 as I thought and he used the
 > same sockets used by the 1625 - and drove it with
 > a 20A.  The article appeared in the December 1958
 > CQ magazine or in their CQ Anthology II, 1952-1959.
 >
 > I have not been able to find the reference on the
 > modified arc-5 transmitter using the 837's but believe
 > it was, as I mentioned, by a W2 last name Vitale I think
 > it was.  Primarily it was for 20 meters.
 >
 > Ray
 > "Texas can make it without the United States,
 > but the United States can't make it without Texas."
 > Sam Houston, Governor
 > Ray Colbert, W5XE, OOTC#3618, SOWP#1064M GQRP-6115
 > ARCI-5784 NCT2R FP-111 El Paso,(FAR WEST) TEXAS




Roy Morgan
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