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Some diagrams and schematics from RCA BC100 broadcast mixer to follow.
 

Attachments

  • rca preamp.jpg
    rca preamp.jpg
    812.9 KB
Instructions for RCA 41-B
[submitted by: dmp]
 

Attachments

  • RCA41B-1935.pdf
    2.4 MB
UOAB schematic and notes
[submitted by: pucho812]
 

Attachments

  • UOAB-notes.pdf
    6.7 MB
RCA BA-72A, very often found as part of the BA-41A package which replaced the BA-31 standalone. 
 

Attachments

  • BA-72A.jpg
    BA-72A.jpg
    849.8 KB
MI-9357A theater preamp.  Some of these output transformers are really 10K DCR primary, some are not.  Curious. 
 

Attachments

  • MI-9357A.jpg
    MI-9357A.jpg
    400.1 KB
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