That's some great info! Thanks Dave!
On 16 Oct 2012, at 22:16, Dave Kendall wrote:
> OK - from memory, the trick is to connect a higher value cap in
> Parallel with the 47nF cap, so;
> * Connect a wire from each side of the 47nF cap to each centre lug of a
> DPDT toggle switch.
> * Connect a larger value non polarised cap across one pair of outer
> lugs. Try a 1uF or bigger.
> * Leave the other outer lugs unconnected.
> * OR: If you have a centre-off type DPDT switch, try connecting a
> different value cap across the other outer pair, for even greater range
> changes. If doing this, you might want to experiment with decreasing
> the 47nF a bit for faster MAX speeds.
>
> The 10K resistor between the wiper of the 500K SHAPE pot and pin 2 of
> the TLO74 can also be increased to lower the MINIMUM speed.
> For some very slow sweeps, I increased the 10K up to as much as 1M2,
> and used a 1uF cap. There is a relationship between the two which can
> affect the waveshape at extremes of speed - again, this is from
> memory....
>
> Lastly, changing the 4K7 to GND from the SPEED pot has an effect on MAX
> speed.
>
> Hope this helps. :-)
>
>
> cheers,
> Dave
>
>
>
>
> On 16 Oct 2012, at 20:51, sirolffoonav wrote:
>
>> Great it will clock too.
>> Haven't found timing info on electro-music.com and muffwiggler search
>> function seems to be out. any wild guess is welcome too. I'll have to
>> install a resonant gate first tonight.
>>
>> --- In cgs_synth@yahoogroups.com, Dave Kendall <davekendall@...>
>> wrote:
>>>
>>> Hi.
>>>
>>> On 16 Oct 2012, at 07:54, sirolffoonav wrote:
>>>> Looking forward to handy extra modulation with this module! How
>> fast
>>>> or how slow would the LFO go with just the 47n cap and no mods?
>>>> I'd love to have it at least from around 30 seconds to almost
>> audio.
>>>> Will this go without mod? Curious for other cap speeds too.
>>>
>>> Have a look on the muffwiggler.com DIY forum, and on
>> electro-music.com
>>> DIY forum - there's a wealth of information in there about modding
>> the
>>> CGS LFO.
>>> Do a search - (you need to be logged into Muff's to do this) and all
>>> sorts of goodies will turn up.
>>>
>>> Short answer, wire a DPDT switch with an extra cap(s) across the
>> timing
>>> cap, and you can go reeeeaaallllllyyyy sssslllllloooooooowwwww.
>>> You can get non-polarized 3.3uF caps quite cheap nowadays.....
>>>
>>>>
>>>> I'll only use the vari outs for now. This way all the knobs
>> (speed,
>>>> shape, vari) will affect the lfo, no?
>>>> And is it still possible to trigger the cgs programmer/sequencer
>>>> while running the LFO on 12V (80%) with a very narrow
>> pulse/square?
>>>
>>> Most CGS modules have comparators on their CLOCK and TRIGGER
>> inputs, so
>>> the answer is very probably yes :-)
>>>
>>> cheers,
>>> Dave
>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>>
>
>
>
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