phobos 4 input mixer

Estebandito

I want to use PHoBos’ - Bandersnatch - 4 input mixer in my lunetta build and am wondering if it is possible to increase its output level (by changing the feedback resistor values?) . I am asking because I am sending a signal from a vactrol controlled passive low pass gate into the mixer and the output volume of the mixer is very low.

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PHOBoS · Posted: Mon Jan 22, 2024 9:11 am Post subject:

Instead of increasing the feedback resistor I would reduce the input resistor(s), the ones that are now 150K.
I choose those values to add some extra attenuation so the output would be more or less a standard line level voltage.

You could change the feedback resistor but it's a bit silly to first attenuate the signal and than amplify it again.
The only thing you have to check is if the signal isn't clipping in the first stage.

Estebandito · Posted: Tue Jan 23, 2024 1:13 am Post subject:

Ah yes of course that makes much more sense: simply changing the 150K resistor values. Thanks!

Estebandito · Posted: Sat Feb 03, 2024 11:41 am Post subject:

UPDATE: As it turned out there was no need to replace the resistors at all. I found out I forgot to connect the 358 to VCC Embarassed

blue hell · Posted: Sat Feb 03, 2024 12:15 pm Post subject: