[Milsurplus] SCR-522 manuals

LARRY D GODEK telegrapher at q.com
Fri Jan 28 12:49:21 EST 2011


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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