Install a Variable Voltage Regulator in Guitar Amplifier

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21:29 Thursday.15 October 2015
have a Gretch 6172 amp and i am replacing both 6973 tubes with 6CZ5’s and making the pin 8 change to pin 1

I need to lower the plate voltage from 440V to 350V for the 6CZ5’s Will your VVR work

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