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
>
>
>
>
>
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