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From: Mark Beckles Willson
Date: Sun, 06 Apr 1997 22:10:27 +0100
Subject: Re: 1964 FENDER AMPLIFIER MOD. HELP!

At 01:43 PM 4/6/97 -0400, you wrote:
> What the circuit
>essentially does is create a variation in output of the power tube. Even
>when turned "off" there is still a draw on the power tube, which takes away a
>little bit of output. taking the circuit out of line will allow for the
>power tube to get full power. Hence, a change in the amp's sound.
>
>

The vibrato circut in the Vibro Champ works on the bias of the driver rather
than on the bias of the power tubes or the input signal to the phase
inverter as in some larger Fender amps. I am not sure that you will gain
much by simply disconnecting the circuit as you might in, say, a Super
Reverb but why not give it a try and let us know....

Mark