The Pulse Modulator is a crazy early 70s pedal from Electro-Harmonix that packs 3 heavy duty tremolo circuits along with a boost circuit in one box. You can use the trems, each with its own speed and volume controls, or the boost but not both together. Pulse Attack affects the entire trem circuit. Pot codes on the on switch(VH4822 and 1377022) indicate this particular pedal was built in mid 1970.
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