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Discussion about the Korg PolySix synthesizer

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More photocoupler info

2013-08-21 by Donald Backshall

Take a look at this blog by Stefan Huebner. He took some measurements with an old P1501 and a couple of Vactrol parts and made a nice chart showing response curves. His conclusion: The VTL5C9 is a much closer match to the old P1501 than any of the parts we have been trying.
http://huebnerie.de/blog/?p=318

Don Backshall

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