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"Sonora; Clear as a Bell"
jr
Add: The earliest Photofact that I have that shows a Sonora (folder 5-31 dated 10/46) looks more modern, but is a fairly typical AA5 and indeed only has only one trimmer on the second IF can (but on the output winding, feeding the 12SQ7)... Likely this schematic (model RBU176) is similar to what you have:
Last edited by jr_tech; 11-08-2012 at 04:41 PM.
Reason: add note
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