MOTM

I just pulled out my two 420s (one where I swapped FM1 and FM2 by accident), 
and popped in my two 440s.  They sound great, but I had swapped FM1 and FM2 
on both of those too.  Geez.  No wonder, the damn numbering of pots on the 
front panels of those filters is jumbled.  1,3,2 and 5,7,6.

I'm using my Roland SH-7 to control my MOTM using the CV and Gate outputs 
(with a mess of alligator clips and resistors to chop down the gate level).  
I measured the CV out on the bottom C note and got a reading toggling between 
2.00 and 2.01.  Up the octaves I got 3.00, 4.00 and 5.00 exactly.  I had no 
idea that both the synth and my BBC meter were so accurate.  Both the synth 
and meter would have to be accurate to less than 1/100 of a volt for these 
kinds of readings.  Amazing.

-Elhardt

I've built two 420s, two 440s, and a 410 (among many others), and I never
swapped any of those pots. No wonder, I followed the damn instructions and
PCB labeling.

Feeling cheeky, not enough coffee yet, just kidding you, Ken... ;)

David.

> -----Original Message-----
> From: elhardt@... [mailto:elhardt@...]
> Sent: Sunday, January 28, 2001 11:37 PM
> To: motm@yahoogroups.com
> Subject: [motm] Roland 1 volt/oct accuracy / FM1-FM2 swapped
> 
> 
> I just pulled out my two 420s (one where I swapped FM1 and 
> FM2 by accident), 
> and popped in my two 440s.  They sound great, but I had 
> swapped FM1 and FM2 
> on both of those too.  Geez.  No wonder, the damn numbering 
> of pots on the 
> front panels of those filters is jumbled.  1,3,2 and 5,7,6.
> 
> I'm using my Roland SH-7 to control my MOTM using the CV and 
> Gate outputs 
> (with a mess of alligator clips and resistors to chop down 
> the gate level).  
> I measured the CV out on the bottom C note and got a reading 
> toggling between 
> 2.00 and 2.01.  Up the octaves I got 3.00, 4.00 and 5.00 
> exactly.  I had no 
> idea that both the synth and my BBC meter were so accurate.  
> Both the synth 
> and meter would have to be accurate to less than 1/100 of a 
> volt for these 
> kinds of readings.  Amazing.
> 
> -Elhardt
> 
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dbivins@... writes:

>> I've built two 420s, two 440s, and a 410 (among many others), and I never 
swapped any of those pots. No wonder, I followed the damn instructions and 
PCB labeling.  Feeling cheeky, not enough coffee yet, just kidding you, 
Ken... ;)<<

Yes, or course, the instructions.  I think that is why I got the first one 
right.  I built the other three later on and followed the PCB labeling only, 
and that was what led me astray.  I have noticed many inconsistancies from 
module to module when it comes to wire color and where it's attached to.  If 
you build a bunch of different modules in parallel assembly line fashion as I 
do, it only makes for potential errors.

-Elhardt