MOTM

Paul's obviously the expert here. To me, it sounds like most everything is  
OK, but it shouldn't be doing what you describe across the frequency  range. 
The first thing I would do is to double check is that the proper  component 
values are where they should be. This includes the  potentiometers. You have the 
benefit of being able to directly compare  the one you built to your 
Synthtech-built module. Also be  sure all IC's are in the correct orientation, 
especially all of the SSM  chips.
 
-Karl.   
 
In a message dated 10/23/2008 12:09:35 P.M. Eastern Daylight Time,  
lexvortex@yahoo.ca writes:

HI,

I just finished a MOTM 440 filter and for the most part it seems  to
work fine, but I noticed as I turn the freq knob past 9 with  the
resonance cranked the resonance stops unlike my other MOTM 440  filter
that Paul built. Also if I have the resonance turned down and have  no
audio going through the filter quite a bit of noise comes out of  the
filter after I turn the freq knob past 9. I also noticed that the  440
that Paul built has a more even sounding resonance across the  audio
spectrum, for example if I use a sequencer on the 1V/Oct input  and
compare the two my 440 sounds weaker and muddier in the lower freq.  
Is this normal?

Thanks for the  help,
Dave





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