MOTM

Hi,

  I double checked all the component values and also had a friend of
mine who specializes in synth repair look at it and all the components
are correct.  I'm using alpha pots so maybe the +-%tolerance of the
alpha pot takes the filter sweep out of range at the top end?  I don't
really know... I would think it would take more than that.  Any other
guesses as to the problem?

Thanks,
Dave


--- In motm@yahoogroups.com, kheck73@... wrote:
>
>  
> 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@... 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
> 
> 
> 
> 
> 
> **************Play online games for FREE at Games.com! All of your
favorites, 
> no registration required and great graphics â€" check it out! 
>
(http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir=
> http://www.games.com?ncid=emlcntusgame00000001)
>