VCA-1 using 12 volts

adambee7 · Joined: Apr 04, 2009 Posts: 420 Location: united kingdom

Has anyone used this with +/-12v instead of +/-15v. Very Happy

drapdap · Posted: Fri Jun 25, 2010 5:12 am Post subject: Re: VCA-1 using 12 volts

Absolutely. Works just fine. Smile

adambee7 · Joined: Apr 04, 2009 Posts: 420 Location: united kingdom

Cheers man. Very Happy

Sound · Joined: Jun 06, 2006 Posts: 842 Audio files: 1

But you should change the value of R23 for unity gain.

At first look , if R12=100K for unity gain at 5V.
R23 should be 240K for unity gain at 12V.

adambee7 · Joined: Apr 04, 2009 Posts: 420 Location: united kingdom

Thanks sound. I did wonder if one or few values would change. Very Happy

alanwilder81 · Joined: Sep 03, 2016 Posts: 310 Location: italy

hello guys,
i am also running my VCA 1 with 12 V.
Although working, it's output volume is very quite.
it's not clear to me what the R 23 and R 12 should be Smile

and, what's the unity gain?
thanks Smile

wackelpeter · Posted: Mon Sep 04, 2017 1:13 pm Post subject:

unity gain: 1:1 amplification

put in 10V p/p and get 10V p/p out, for example...