MOTM

>They both seem to work fine, except the one I built has a much wider
>frequency range.  It is much slower when the knob is all the way
>down, and much faster when all the way up, compared to the one I
>bought used.  This difference seems to be much greater than the 5%
>tolerance of the pots.  Any ideas what might be causing this??  Could
>anyone who has several 320's please comment on how your units
>differ??  I would like to get them so they have a similar response.

I have four units, all built by myself in assembly line fashion. I've 
measured the maximum frequency (after adding DB-320 daughterboard) of 
eachand found that it ranges from about 450 to about 650 Hz. I'm not 
sure why there is such a variance, but it seems to be normal for this 
module.