Sanken and Sanyo Audio Power Integrated Circuits - Hybrid IMST ICs

These are the STK Audio Power ICs that were put out by Sanken, Sony, and Sanyo. These Hybrid IMST ICs have been used in power amplifiers, and various wattage. 

Here is a list of the ones in my collection, all are new old stock:

STK400-020Sanyo1Hybrid IC
STK401-041Sanyo1Hybrid IC
STK4231MK2Sony1Hybrid IC
STK4274Sanyo1Hybrid IC
STK4362Sanyo5Hybrid IC
STK502Sanyo1Hybrid IC
STK503Sanyo1Hybrid IC
STK5322Sanyo1Hybrid IC
STK5436Sanyo3Hybrid IC
STK5446Sanyo2Hybrid IC
STK5451Sanyo6Hybrid IC
STK5461Sanyo1Hybrid IC
STK5474Sanyo2Hybrid IC
STK5481Sanken1Hybrid IC
STK5482Sanken1Hybrid IC
STK5483Sanyo1Hybrid IC
STK730-090Sanyo1Hybrid IC

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