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Reducing frequency of 380 LFO

Reducing frequency of 380 LFO

2004-08-03 by Adam Schabtach

I find that the nominal frequency range of 0.03-35Hz of the 380 LFOs is a
bit high for my tastes. Is there a "standard" modification for reducing the
range? I'd like a range in the neighborhood of 0.01-10Hz. I can see a couple
of ways of doing it, but I wonder whether Paul or anyone else has done this
already. (Yes, I realize I'll have to do the same mod on each of the four
oscillators. I'm thinking that I'll leave two as-is and mod the other two.)

Thanks--
--Adam

Adam Schabtach
adam@...
www.studionebula.com

Re: [motm] Reducing frequency of 380 LFO

2004-08-03 by synth1@airmail.net

> I find that the nominal frequency range of 0.03-35Hz of the 380 LFOs is a
> bit high for my tastes. Is there a "standard" modification for reducing
> the
> range? I'd like a range in the neighborhood of 0.01-10Hz.

Change the timing caps. There are details in the Theory section. To go
twice as slow, double the cap values. Be careful: you need to use *good*
caps here (the ones in the kit are Panasonic caps from Digikey) and watch
the lead spacing on the larger caps.

Paul S.

RE: [motm] Reducing frequency of 380 LFO

2004-08-03 by Adam Schabtach

> Change the timing caps. There are details in the Theory section.

Got it. That was one of my guesses. :-)

> Be careful: you need to use *good*
> caps here (the ones in the kit are Panasonic caps from Digikey) and watch
> the lead spacing on the larger caps.

Roger wilco. Thanks!

--Adam

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