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After resoldering a couple of tests showed all 9 channels ok, with a few balance potentiometer a bit "scratchy". Here external capacitors, resistors and wiring solves the differential equation of a damped oscillator. Output is to a vintage Heathkit IR-5207 XY recorder (assembled by. F. Massen in 1980). The brown power outlet is a "ground" multiplier (there are only two ground connectors on this model). | |
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