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Re: MS20/MOTM-420 Filter {my experience}

Re: MS20/MOTM-420 Filter {my experience}

1999-08-15 by william Hanson

I once owned the MS-10 , MS-20, & MS-50.
the MS series as a whole ,.....or at least
the 20 & 50 I had, -were very distict in that
"shortwave radio" kind of way - although this
may also have been the analog delays I use adding to 
that nifty "shortwave" quality. I notice that
on the MOTM-420s' the sine out on self oscillation
sounds more square-like than the original MS stuff
which You may or may not want , maybe I'm doing
something wrong ? any ideas - anybody?
Thank You for reading my semi-feckless mianderings.
Bill

Re: MS20/MOTM-420 Filter {my experience}

1999-08-15 by Paul Schreiber

I notice that
>on the MOTM-420s' the sine out on self oscillation
>sounds more square-like than the original MS stuff
>which You may or may not want , maybe I'm doing
>something wrong ? any ideas - anybody?


Be sure that you don't have the RES set to 10. Rather, set it
for the *onset* of resonance (about 8.5 on my system, where I set
the trim pot).

At resonance onset, the sine is the most pure. As you increase the RES pot,
it will "square up" slightly due to the resistor/cap/OTA gains being not
matched perfectly.

Also, remember you will be driving a signal about 6V pk-pk out. This is 6
times larger than
a "standard output" and the 'distortion' may be in your mixer/preamp/amp,
not the MOTM
itself.

Paul S.

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