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Re: [SPAM] [cgs_synth] cgs tube VCA

Re: [SPAM] [cgs_synth] cgs tube VCA

2009-03-10 by sasami@hotkey.net.au

You won't damage it. You'd probably lose a little gain, and maybe get some
more distortion.

Ken
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>hello,
>i intend to start building a couple of the tube VCAs and i am hoping to add
them to a 12volt system. will this work? should i just test them with 12v
and hope for the best or could this potentially damage the VCA? is a 15volt
supply absolutely nessecary for these VCAs? any info greatly appreciated!
>thanks
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: [SPAM] [cgs_synth] cgs tube VCA

2009-03-11 by analogback

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
Show quoted textHide quoted text
>
> You won't damage it. You'd probably lose a little gain, and maybe get some
> more distortion.
>
> Ken
>
> >hello,
> >i intend to start building a couple of the tube VCAs and i am hoping to add
> them to a 12volt system. will this work? should i just test them with 12v
> and hope for the best or could this potentially damage the VCA? is a 15volt
> supply absolutely nessecary for these VCAs? any info greatly appreciated!
> >thanks
> >
> >
> >
> >------------------------------------
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >Yahoo! Groups Links
> >
> >
> >
> >
> _______________________________________________________________________
> Ken Stone sasami@... otherunicorn@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>

Thats great,
thanks for the answers guys.. i'll test it out first and let you know the results, hopefully it works! I am planning to drive a spring reverb with one of the VCAs so it may or may not need the extra gain.
regards, gab

Re: [SPAM] [cgs_synth] cgs tube VCA

2009-03-11 by Mark

On 3/11/09, analogback put forth:
>Thats great,
>thanks for the answers guys.. i'll test it out first and let you
>know the results, hopefully it works! I am planning to drive a
>spring reverb with one of the VCAs so it may or may not need the
>extra gain.
>regards, gab

Sure, increasing the power supply will increase the maximum amplitude
of the signal the module can produce. It's also dependent on which
op-amp you choose (some can operate closer to the rails than others).
However, you can increase the gain of the output amp by changing the
resistors. Although, that still may not be adequate for driving a
spring reverb. It depends on the transducer. You might want to look
at the use of discrete transistor followers used to drive speakers.

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