| The AB763 circuit is
not just one amplifier. It can be made into several different
amplifiers by just using a different transformer set. What is the
difference between a Deluxe reverb, Vibrolux reverb, Bandmaster
reverb, Pro reverb, Super reverb, Black face Vibroverb and the Twin
reverb? About the only difference is the transformers, the power tubes
and the cabinet/speaker box. There are a few minor differences on the
circuit boards themselves but it is not a different circuit. There may
be a .01 capacitor on one model and there may be a .02 cap in the
exact same spot on another model. The differences between any of the
models above are very few if any.
If you are building a Deluxe reverb for
example and you are an anal retentive type of person, you may want to
look at an original layout diagram to see if there are any differences
in the components. For example, if you feel that the original .02
capacitor may sound better than a .01 capacitor, then by all means
swap them out. I would wait till you get the actual amp running before
you do any parts swapping. Then you can do a before and after type of
listening test.
My AB763 board does have one major
difference, I use the tremolo from the Black face Vibroverb. This is
not an opto isolator tremolo. This tremolo pulses the power tube bias
voltage up and down and sounds way better than the opto tremolo to me.
It is a very smooth tremolo.
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