OptocouplerOptocouplers transfer electrical signals between isolated circuits through light, allowing isolation of high voltages from lower voltages.
Optocoupler - Vactec, VTL5C1, Vactrol, New Old Stock
New old stock Vactec VTL5C1 vactrols from Perkin Elmer Optoelectronics. These premium vactrols are a great choice for use in phasers, compressors, tremolos, and synth modules such as low-pass gates. They are also used in switching circuits in amplifiers. Limited quantities are available.