A+.
The M and B pots down become zero ohms to ground - grounding the bottom of the T pot. Turn T all the way down and the T wiper is now connected to ground through those other two pots. AS soon as you turn up the T, then it is no longer grounded and signal starts to pass. On the other hand, leave T at its zero, but raise one of the other ones. Now the bottom of the T pot is no longer at ground, so neither is its wiper even though at zero. So sound passes.
SOunds like you probably have it now. I hope you learned somethng about the process of troubleshooting, as opposed to just finding out what to change to make this amp work.
The M and B pots down become zero ohms to ground - grounding the bottom of the T pot. Turn T all the way down and the T wiper is now connected to ground through those other two pots. AS soon as you turn up the T, then it is no longer grounded and signal starts to pass. On the other hand, leave T at its zero, but raise one of the other ones. Now the bottom of the T pot is no longer at ground, so neither is its wiper even though at zero. So sound passes.
SOunds like you probably have it now. I hope you learned somethng about the process of troubleshooting, as opposed to just finding out what to change to make this amp work.
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