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Smashing pumpkins electric mistress6/3/2023 Howard was responsible for over a dozen E-H pedal circuit designs, as well as most the the ”deluxe“ Electro-Harmonix models that appeared in the late 1970s to early 1980s, including the superb op-amp Deluxe Big Muff, Deluxe Memory Man, and Deluxe Electric Mistress. Howard Davis, Manager of Analog Circuit Design for E-H from 1976-1981, was the circuit designer for this version. I have also seen one op-amp "EH 3003B" with a slightly different circuit board layout than the standard 3003B. Early versions of the op-amp circuit board were marked with the same "3003" number used on the V2/V3 versions, but later production changed to "EH-3003B", and then "EH-1322". CIRCUIT - The V4 circuit was about half the size of the V2/V3 transistor circuit.
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