To economize production, two of the three circuit boards used in the V4 Big Muff were also used in the Little Big Muff pedal enclosure. It is likely this version and the V5 tone bypass version listed below were made simultaneously, with the V4 version being phased out in 1978 or 1979. Op-amps are operational amplifiers, also known as ICs (integrated circuits or chips). The traditional four transistor Big Muff circuit was radically changed at this time to a new circuit that used op-amp chips and one less gain stage, in an effort to reduce manufacturing costs. The 50,000 square foot Manhattan factory was generating five million in annual sales. Place of Manufacture: Manhattan, New York, USAĪround 1978 Mike Matthew's Electro-Harmonix company was doing very well worldwide, with offices in Tokyo, London, and Toronto, in addition to the New York office. Packaging: White corrugated cardboard box with red printing This is reverse polarity of typical pedals so use an E-H power supply or use a converter adaptor like the 1 Spot C35 3.5mm ConverterĮnclosure Size: 6 7/8 " x 5 1/2" x 2 1/4"(short end) x 2"(long end) / 174mm x 138mm x 35mm(short end) x 57mm(long end) Power: 9V battery or power jack for an AC adaptor. Model Numbers: EH3003A, EH3003B, EH1322, EH1322B, EH3003Ĭircuit Designer: Howard Davis and Michael Abrams Website and contents ©Kit Rae.Ĭirca 1978 ( Pots typically date as early as 1976 and as late as 1978) Permission required to repost any information from this site in any ebay listing. They are my categorizations, for identification purposes only. Version, Edition, and Revision numbers listed here are not actual Electro-Harmonix identifiers. This website is constantly updated as new information becomes available.
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