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RCA patent 1956 - Transistor tone control feedback circuit
https://www.stompboxes.co.uk/forum/viewtopic.php?t=7654
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RCA patent 1956 - Transistor tone control feedback circuit
Posted:
Thu Aug 26, 2010 1:01 am
by
Bert Ohlsson
http://www.freepatentsonline.com/2994040.pdf