[sdiy] Top DIY VCO

[Scott Gravenhorst]

=?ISO-8859-1?Q?Fr=E9d=E9ric_Bourgeais?= <fred at upian.com> wrote:
>Hello all,
>
>Thanks for your comments  ;-)
>Ok for using several VCO instead one for fatness.
>
>About discret componants:
>I didn't understood 'discret', I don't want to use expensive or too 
>exotics chips as CEM. I just want easy to find componants : )
>
>So, I got only 3 links,
>
>MOTM-310 kit n@ www.synthtech.com
>ARP 2600 VCO
>Ray wilson VCO
>
>Nothing else ? what's about Rene Schmitz's one ? 

Do you mean his 4069UB VCO?  He calls it a "bench test" VCO, but I think
it's better than that.  It has PWM as well as sawtooth output and uses
one of the easiest parts to find (and least expensive) ever, the 4069UB.
 The one I built covers a 9 octave range (I stopped testing after 9),
it's extremely simple, it took me an hour or so to build on stripboard. 
It's very musically linear.

>Some are more 
>recommended than other ones?
>
>thanks
>fred
>
>
>Le 8 mars 05, à 08:35, nN AAt e e a écrit :
>
>> actually... going back to that original PHAT comment... the two main 
>> axis of
>> a wave is frequency and amplitude... but what do you call the 
>> thickness of
>> the wave? is it possible to increase the 'bandwidth' of the output... 
>> an
>> actual thick wave? i don't think it would make any difference... i 
>> don't
>> know. it's a weird thing to think about...
>>
>> i guess it could be done easily with some additive work... modulating 
>> too.
>>
>> the idea of a wave that isn't a single voltage/base pitch being 
>> modulated s
>> just really awkward or just wierd i think... wideband voltage?
>>
>> - nate... i need to sleep. badly.
>>
>
>

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