[sdiy] 3 questions, Formant and MOTM

[Paul Schreiber]

>
> Q1: I believe I read somewhere the MOTM uses different colored (even
> bicolor) leds for different signals. I can not seem the find the place I
> read that anymore, could anyone tell me what colors are used for what kind
> of signal?

MOTM uses Lumex LEDS with a snap-in bezel. In the US, DigiKey has the Red and Green ones (we use
mostly Red). The MOTM-320 LFO has a custom made Lumex bi-color LED (Red/Green). It shows positive
LFO cycles in Green.


>
> Q2: I read the MOTM uses alcoswitch PK/ES -90B knobs. I am planning to use
> PK/ES-70B and some PK/ES-60B knobs on my formant, however on some pictures I
> saw it looks like these look different (apart from size) than the 90B ones.
> I can not find a place where I can just order 1 of the 90B ones to look at
> it myself, so has anyone seen these 3 knobs and tell me if they really are
> the same apart from size as you would expect looking at their product code?

The PKES90B1/4 we use has a different proportion of "black area" to "silver insert" than the
smaller knobs. But all the knobs are basically the same except for diameter. Note these are
*close* but not exactly the same as the Cosmo Plastics knobs used by Moog.

Paul S.