[sdiy] 100K pot in Music Easel timbre section, and board setup

[Romeo Fahl]

Hi Aaron,

I've found the buchla front panel layout handy when attempting to
decode the music easel's schematics. I think that the S1, etc...
connections might go the PCBs  that you could use to make your own
presets.

http://www.wavemakers-synth.com/buchla/PaMtEO.pdf

On Sun, Nov 23, 2008 at 1:35 PM, Aaron Lanterman
<lanterma at ece.gatech.edu> wrote:
> Hello keepers of the knowledge of Buchla:
>
> 1) If you look here, you'll find the "timbre" generating circuitry of the
> Music Easel:
>
> http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_9_200.jpg
>
> In the lower part of the schematic, there's a 100K pot, which runs from the
> collector of Q5 go ground, with the wiper going to the gate of Q6 through a
> 10K resistor.
>
> Is this pot on the front panel, or is it a trim pot of some sort on the
> circuit board?
>
> 2) If you look here, you'll find a set of diagrams describing how the
> various boards connect to each other:
>
> http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_13A_200.jpg
> http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_13B_200.jpg
> http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_14A_200.jpg
> http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_14B_200.jpg
>
> Is there a "master key" of what the various S1 and S2 marking along the top
> and bottom of the pages correspond to? I'm sure with a lot of detective work
> I could puzzle it out - I was just wondering if there was a known list
> somewhere.
>
> - Aaron
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