[Milsurplus] SCR-522 Power Supplies, WAS SCR-522 manuals

[Don Merz]

FOR SALE: I have two homebrew 19 inch rackmount power supplies for the SCR-522 
transmitter and receiver. One of them uses the original rectangular power plug. 
I am not sure about the other. But they are both very well made with name-brand 
transfomers and components. They are not in a cabinet, just the chassis with 
front panel and one of the panels is masonite. These have not been powered on in 
years so some caps may need reformed or replaced. But you can use these to get 
your SCR-522 on the air with very little effort. $40 plus FedEx Ground shipping 
cost on about 50 pounds in 2 cartons. e-mail Don at n3rht at yahoo.com.



----- Original Message ----
From: Jack Antonio <scr287 at att.net>
To: LARRY D GODEK <telegrapher at q.com>
Cc: milsurplus at mailman.qth.net
Sent: Fri, January 28, 2011 1:30:29 PM
Subject: Re: [Milsurplus] SCR-522 manuals

My TO 08-10-105 is dated 16 Feb 1943, revised 4 Sept 1943.
There seems to be some discrepancy between the table of contents
and reality.

The table of contents lists Fig 70 as the schematic for the BC-625-A
It is actually the schematic for the entire radio set.

Fig 71 is listed as the practical wiring diagram for the entire set, but is
actually the the practical wiring diagram of the transmitter.

Looks like whoever laid out the manual transposed parts of
the titles.

There does not seem to be a separate transmitter schematic.

I have an addendum to TO 08-10-105 dated 23 March 1944
which describes the addition of the noise limiter to the
receiver.  (Thus making it a BC-624-AM)

Hope this helps
Jack Antonio WA7DIA/4

On 1/28/2011 12:49 PM, LARRY D GODEK wrote:
> I recently sold a pair of SCR-522 manuals and got some feedback from one of the 
>buyers on the list about it.  Seems that there was no schematic diagram for the 
>transmitter alone.  The manuals i had sold were AAF  Technical Order 08-10-105 
>from the 1943 period.  Figure 70 is there which shows the wiring diagram for the 
>BC-625-A transmitter but then it jumps to Figure 72 which is Jack box BC-629-B.  
>Inded it appears that figure 71 which is missing was cut out of the manual.  
>There is no schematic for the 625 transmitter in any of the older AAF TO's 
>apparently?  The AAF manual i'm looking at is 08-10-105 dated Sept. 17, 1942 
>revised January 28, 1943.  This is the Instruction Book for Operation and 
>Maintenance of SCR-522-A etc.  This TO has extensive notes inside one of which 
>mentions the xtal frequency of 8386.47 Kc, operating frequency of 154.57 for the 
>receiver and an Xtal frequency of 8587.22 for the transmitter.
>
> Now i have  another TO AN16-40SCR522-3 which is the handbook for Maintenance 
>Instructions Radio Sets SCR-522-A and SCR-542-A dated 30 Oct 1944 revised 20 
>June 1945 that is totally revised as far as paragraphs and figure notations are 
>concerned.  In this manual Figure 8-46 (Pages 8-43-- 8-44 show the BC-625-A, 
>BC-625-AM wiring diagram but it includes all 17 modifications done to it.  They 
>are annotated to the left side of the diagram and the actual mods are 
>crosshatched out in red ink.  The actual schematic for the BC-625-AM transmitter 
>is Fig. 8-43 on pages 8-37--8-38.
>
> Can anyone comment on this?
>
> Larry
> W0OGH
>                        
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