ampage Tube Amps / Music Electronics |
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Wild Bill![]() |
different EH Memory Man schem A friend gave me an old EH Deluxe Memory Man to fix. I went googling for a schematic and what I found doesn't match. This unit doesn't use MN3005's - it has SAD1024's. There's no sign of a 4047 clock chip. There are scads of RC4558 dual op amps. It uses the pass transistor voltage regulator but not a 2n6111 but rather a 2n6290. This in itself is no big deal - the circuit is regulating ok but to -20 volts instead of -15! There's no delay or effects at all. The dry signal comes through ok. The output pins on the opamps are sitting near the -20 volt rail, which I'm guessing is a real bad sign! ![]() Any hints or ideas? ---Wild Bill |
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puretube![]() |
you probably find more replies, when you repeat your question here. http://diystompboxes.com/sboxforum/viewforum.php?f=2 |
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