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| | |-+  Internal Trimmer in PI section		 « previous next »
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Author Topic: Internal Trimmer in PI section  (Read 5386 times)
shebbycaster
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« on: May 22, 2011, 12:55:41 AM »
My Expression has an internal trimmer that looks like it adjusts either the negative feedback loop or voltage in the Phase Inverter section.

How should I set it to get the best tone?
« Last Edit: May 24, 2011, 04:49:46 AM by shebbycaster » Logged
shebbycaster
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« Reply #1 on: May 25, 2011, 12:38:20 PM »
I found out from Nik that the trimmer is on the tail resistor of the phase inverter.  He suggested adjusting it by ear paying special attention to the overdriven sound.  I will also check to see if it affects the voltage on pins one and six of the phase inverter tube similar to the PI trimmer on an OTS.
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