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Volume pot issue
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Bender:
Thanks for the heads up!

OK, full disclosure here
I'm using a 60 in 1 Jamma board that acts as the amp too. It has a mini pot on it to control volume and I want to put a volume knob on the cab

What is the best way to do this?

It looks like there are 3 pins to this pot. It is mono.
So could I just run some wires from the pins to a pot on the cab?
How do I test to see what pin goes to what on the new pot?
DaOld Man:
Best case scenario would be to de-solder that pot and solder in jumper wires to your new pot, but since Im sure you dont want to take a chance of screwing up that board, you can try just connecting the new pot to those solder pads.
Then you can leave the old pot turned to midway position.

To find out what connections are what, use an ohm meter (DVM is best), turn old pot all the way down (silent).
measure between two of the solder pads. The two reading the lowest resistance (very close to zero) will be the ground and the wiper.
Now turn the pot all the way up (loud). The two measuring the lowest resistance will be the wiper and the input.
By process of elimination, pick out the wiper. That will be center tap on the new pot.
If the new pot acts reverse (up is silent, down is loud), just swap the two outside taps on the new pot.
Your modification will work a lot better if you just remove the old pot though.

Zebidee:
Despite my former advice, most game PCBs are designed to go into cabs, most cabs are fitted with volume pots and the PCB amplifiers are designed for encountering variable situations sooooo ....... maybe you just have a look at what pots they use in other cabs and try that first.  We don't want you to hack up your PCB unnecessarily. I'll have a look at some typical pot values for you tonight (off to work in a minute).
Encryptor:
Check out this thread from the Oscar Mirror Site.

http://mirrors.arcadecontrols.com/OscarControls/volume/index.shtml

Encryptor
Bender:
Thanks so much everyone, keep the info coming! :cheers:

Right now I think I'll try soldering in to the existing pot and see how that works, then I'll move on to desoldering the old pot if necessary

I'll post back and let you know how it went
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