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Spectrol 148 use in the modules

2007-05-23 by Paul Schreiber

Just to clarify:

a) The MOTM-300 VCO uses *no* Spectrol 148 pots. There are 5 149 cermet pots, 
and 1 Bourns pot. This pcb would *not* need a redesign.

b) the MOTM-310 uVCO uses 1ea 148 linear pot in the SHAPE circuit. Could I use a 
149 as a replacement? Sure, would prefer not to because the cermet element is 
"grainer" and there is a possibility of some noise when turning.

c) the 100K log pots are used for *audio inputs only* on the VCFs (420/440/480) 
and the mixers.

d) I *prefer* to use 148 linear pots in some other modules but switching back to 
149 cermet is *OK*. In fact, I didn't start using 148 linear pots until the '310 
shipped.

e) I reason I stopped using the 248 pots is the plastic bushings/threads were 
easily stripped. But the issue is not 'conductive plastic', the issue is *log*.

Paul S.

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