Archive | November, 2015

ARP tantalum capacitors

This one didn’t go up in a blaze of glory, but the potential was there…  The tantalum capacitors in vintage ARP synthesizers were of questionable quality when they were new, and now are disasters waiting to happen.  Good quality tantalum capacitors are a fire hazard when exposed to even brief voltages that barely exceed their […]

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ARP String Ensemble Power Supply rebuild

The ARP String Ensemble we have in stock rolled off the factory line in 1974.  Everything inside was original, including the power supply capacitors.  The ARP/Solina String Ensemble uses an unregulated power supply, with the varying voltages being generated by rudimentary resistor voltage dividers.  The filter capacitors in the original synth were 25V capacitors, on […]

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