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I was going to give my
Pioneer SX-838 the heave-ho. I purchased it from Harvey
Electronics in 1976 and lugged it from 45th Street to my (our)
apartment in Brooklyn Heights -- it survived 3 kids and much
abuse as a disco amplifier, but problems with the volume and
tone controls, it's somewhat undesirable "retro" appearance
destined it for the ash-heap.
Well, I wrote an article for
AudioXpress describing National Semiconductor's
LM4702CTA Driver Chip. This neat device replaces the
input transistors and associated circuitry on one TO-220 style
device. I had some driver boards made by my printed
circuit house and decided that replacing the original driver
board with the new PCB.
Well, the new amplifier with
the driver board and 2SK1058, 2SJ162 lateral mosfets output
devices sounds just great.
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