[Amps] Fw: Another Plate Transformer Question

[Don Lemley]

John,
	Thanks so much...  I really appreciate the data.  I figured
someone on here would have a catalog that listed this thing.  It looks
like my guess
of this thing being designed as about a half gallon IVS power supply is
close.  I'm thinking it was probably for one of the early 60's VHF/UHF
amps
using a pair of 4cx250s or something similar, based on the rest of the
supply voltages, but the builder just used what he had for the screen
supply, which is Waaay over sized...   

Anyway, thanks again for the help,

Don Lemley - W8HRQ
w8hrq at comcast.net
 

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]
On Behalf Of John Finner
Sent: Thursday, May 05, 2005 7:52 PM
To: amps at contesting.com
Subject: [Amps] Fw: Another Plate Transformer Question

Don

And The Master 23rd edition Thordarson section says:
T-21P83
1560-0-1560
1250-0-1250
@ 200 ma DC
Pri 117 V 50/60 cps (I know, I know)
Secondary voltage changed by primary tap.
Static shield.
Size H 6"  W 4 3/4"  D 8 1/2"
Mtgs cntrs 7 5/8" x 2 3/4"

John, WA4EPI

> Date: Wed, 4 May 2005 09:13:40 -0500
> From: "Don Lemley" <w8hrq at comcast.net>
> Subject: [Amps] Another Plate Transformer Question
> To: <amps at contesting.com>
> Message-ID: <00bc01c550b3$79291230$6bfea8c0 at HamBone>
> Content-Type: text/plain; charset="us-ascii"
> 
> I just ran on to a HB power supply that looks to have been built for a
> tetrode amp of some sort, with hollow state electronic regulated 350V
> screen supply, etc.
> However, I don't know the actual ratings on the plate xfrmr, and the
> power supply needs several electrolytics replaced, etc before I can
> bring it up.
> My question is, does anyone know the specs on a Thordarson T-21P83
plate
> xfrmr?  I have checked the catalogs that I have been able to find,
> including the 1938/39 and 1942, as well as the newer Catalog #76, but
I
> don't find any reference to this puppy.  My guess is that this thing
was
> designed for a half gallon amp, but the screen supply is much too
large
> for that, and the plate transformer also looks to be a little large
for
> a half kw, so I could use some help if someone has a catalog that
lists
> this thing.
>  
> Many thanks in advance,
>  
>             Don
>  
> Don Lemley - W8HRQ
> w8hrq at comcast.net


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