[sdiy] Volume control help

[Scott Gravenhorst]

One thing to try is to replace the one meg resistor (R14)
with a one meg pot used as a voltage divider.  That way, all
of the expected impedances are what the circuit expects. 

Mikael =?iso-8859-1?b?TfhydXA=?= <Mikael at mikmo.dk> wrote:
>Hi list.
>
>I'm building a small mixer for mixing audio signals in the
>modular synth i'm building. The mixer i build does not have
>a master volume control, so i figured it could not be too
>difficult to ad one but....
>
>The schematics for the mixer is here :
>
>http://www.generalguitargadgets.com/diagrams/mixer_sc.gif
>
>Rather standard as far as i can tell.
>
>What i tried was to just put a 10k pot wired as a voltage
>divider between output and ground, so that i had output
>from the mixer one side lug on the pot, ground to the other
>and my output jack to the center lug.
>
>What i achieved was a very very low output level, i had to
>use the mic input on the main mixer to hear anything.
>
>If i bypass my futile attempt on the master volume control,
>the mixer works fine. What have i done wrong, and how could
>i implement a master volume control on the mixer ?
>
>Thanks
>
>Mikael
>

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