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I have a PVX 20 preamp by gemini. the volume knob doesnt seem yo do anything. what is it suppose to gain?

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Hi there - did you ever solve the problem? I have one of these and it only seems to have a gain of about 5. As long as you're taking your output from 'Pre Out' 1 or 2, the volume control should adjust from no output to max.

Posted on Jan 29, 2010

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My recieve on cb radio doesnt work


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I have very low volume when plugged into any input and is full of static no matter the gain/drive setting, Is the whole preamp bad or do i just to replace the tube in it, it is supposedly brand new, i have...


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The preamp section has a problem. It could be anything in the preamp but is OFTEN the input jack itself. They take a lot of abuse.

Also the insert jack contacts that forward the preamp to the power amp if no external FX are used can go bad.

Additional things are circuit board cracks caused by rough handling and also controls that have had the knobs mashed in which can destroy the potentiometers they are connected to.

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Hi there

Check for a dry solder joint on one end of the vol control(earthy end). This will be causing your problem. The pot itself may actually be faulty to. You can always get stuff like that, just got to identify it. Check soldering to the pot first.

best regards
Graeme

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