Cgs synth

On Apr 12, 2006, at 5:49 AM, The Alison Project wrote:

> Hey all
>
> Can the Utility LFO be modified to run at a slower rate???? If so can
> anyone point me in the right direction for this modification,
> preferably I would like to add a switch that can let me choose between
> short and long lfo range times.
>
> thanks
> Chris
>
> [Non-text portions of this message have been removed]
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

On 4/12/06, Romeo Fahl <rfahl@...> wrote:
>
> I did this. The 47n cap attached to the opamp labelled "integrator" is
> what determines the oscillation rate. I put a larger and a smaller cap
> in parallel so that I'd have three ranges to switch between. Pretty
> simple mod, actually. Take a look at Ray Wilson's LFO design for a
> visual diagram:
>
> http://www.musicfromouterspace.com/analogsynth/coolnewlfo.html
>
> I think I used 2.2uF electrolytics back to back for a really slow rate,
> similar to the way Ray used C1 and C2 in his circuit.
>
> Romeo
>
>
>
>
>
> On Apr 12, 2006, at 5:49 AM, The Alison Project wrote:
>
> > Hey all
> >
> > Can the Utility LFO be modified to run at a slower rate???? If so can
> > anyone point me in the right direction for this modification,
> > preferably I would like to add a switch that can let me choose between
> > short and long lfo range times.
> >
> > thanks
> > Chris
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > The CGS Modular Synth home page: http://www.cgs.synth.net/
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>
>
> ------------------------------
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>
>
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> ------------------------------
>



--
listen to my tunes,

http://www.cubanpetemusic.com/12_21_04%20final%20mix.mp3

www.cubanpetemusic.com


[Non-text portions of this message have been removed]

On Apr 12, 2006, at 12:05 PM, Pete wrote:

> I was just about to ask this question. I just got my LFO boards, and
> this
> is a very simple mod. Cool stuff! What other value caps can be used?
>
> Thanks Romeo
>
> pete
>
> On 4/12/06, Romeo Fahl <rfahl@...> wrote:
>>
>> I did this. The 47n cap attached to the opamp labelled "integrator"
>> is
>> what determines the oscillation rate. I put a larger and a smaller
>> cap
>> in parallel so that I'd have three ranges to switch between. Pretty
>> simple mod, actually. Take a look at Ray Wilson's LFO design for a
>> visual diagram:
>>
>> http://www.musicfromouterspace.com/analogsynth/coolnewlfo.html
>>
>> I think I used 2.2uF electrolytics back to back for a really slow
>> rate,
>> similar to the way Ray used C1 and C2 in his circuit.
>>
>> Romeo
>>
>>
>>
>>
>>
>> On Apr 12, 2006, at 5:49 AM, The Alison Project wrote:
>>
>>> Hey all
>>>
>>> Can the Utility LFO be modified to run at a slower rate???? If so can
>>> anyone point me in the right direction for this modification,
>>> preferably I would like to add a switch that can let me choose
>>> between
>>> short and long lfo range times.
>>>
>>> thanks
>>> Chris
>>>
>>> [Non-text portions of this message have been removed]
>>>
>>>
>>>
>>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>>
>>> Yahoo! Groups Links
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>>
>>
>> ------------------------------
>> YAHOO! GROUPS LINKS
>>
>>
>> - Visit your group
>> "cgs_synth<http://groups.yahoo.com/group/cgs_synth>"
>> on the web.
>>
>> - To unsubscribe from this group, send an email to:
>>
>> cgs_synth-unsubscribe@yahoogroups.com<cgs_synth-
>> unsubscribe@yahoogroups.com?subject=Unsubscribe>
>>
>> - Your use of Yahoo! Groups is subject to the Yahoo! Terms of
>> Service <http://docs.yahoo.com/info/terms/>.
>>
>>
>> ------------------------------
>>
>
>
>
> --
> listen to my tunes,
>
> http://www.cubanpetemusic.com/12_21_04%20final%20mix.mp3
>
> www.cubanpetemusic.com
>
>
> [Non-text portions of this message have been removed]
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>
>
>

> With lower freq stuff it doesn't seem to matter too much. I used a
> 3.3uF non-polarized cap on one, two polarized 2.2uF caps back to back
> on another. I got the idea from an LFO in Barry Klein's book, which I
> think used two 1 uF caps back to back. For a faster range, I would try
> the default cap value x 10. Since you're working with a utility LFO,
> there's probably no hard and fast rule as to what will work best.
>
> Romeo

>
> On 4/12/06, Romeo Fahl <rfahl@...> wrote:
> > With lower freq stuff it doesn't seem to matter too much. I used a
> > 3.3uF non-polarized cap on one, two polarized 2.2uF caps back to back
> > on another. I got the idea from an LFO in Barry Klein's book, which I
> > think used two 1 uF caps back to back. For a faster range, I

> > the default cap value x 10. Since you're working with a utility LFO,
> > there's probably no hard and fast rule as to what will work best.
> >
> > Romeo
>
> In MANY LFOs built over the years from Electronotes and Barry Klein
> originals, I've gone anywhere from 0.1 to 10uF in values. Try
> different combinations out, to see which you like the best. :)
>
> --
> Take care,
> Warmth and Peace,
> Ryk
>
> http://www.sdiy.org/damian/index.html - still transferring all from
> the old site - Mar 2706
>
> Schematics coming to the webpage soon - as I'm following Scott G.'s
> method of using Microsoft Paintshop to make my schem's with. :) :)
>