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M400 vol/tone pot values

2007-05-25 by Bruce Daily

Hi all-
My M400 tone control is non-operational, thought I
would dig into the problem. Tested it, wiper appears
to be open. Reads 32K for the full value between the
other terminals. Is this a correct value, and is this
pot linear or log(audio) taper? I don't have
schematics yet. This machine has 2 cards in the
preamp box, pots have plastic shafts. May as well get
the volume pot value, too, if it is not too much
trouble.

Thanks

-Bruce Daily
M400 #1221

PS- The control knobs on Mark Wallis' WEM Audiomaster
mixer look quite familiar...






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