[Milsurplus] [MMRCG] Capacitor across AOT primary

MICHAEL BITTNER mmab at cox.net
Wed May 4 11:54:34 EDT 2022


Dave,  Here is a nice explanation of motorboating and cures for it.  Scroll down to the paragraph titled  Audio Section Troubles.

https://canadianvintageradio.com/wp-content/uploads/2015/03/How-To-Fix-a-Receiver-That-Squeals-and-Motorboats.pdf

When I encountered this problem, I always first check for any defective capacitors that are directly across the B+ line.  Those are C-142, C-143, and C-132 in your Radiomarine set.  I missed the starting question in this thread, so  you may have already done that.  Mike, W6MAB
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