To see embedded text comments, go to video on Youtube. If you want cleaner and spankier preamp distortion charcteristics, you may replace the V1 or V2 12AX7 preamp tube with 12AT7 and 12AY7.
Summary The AB763 Super Reverb is a very popular Fender amp due to the huge tone, robustness and the pure tone from the traditional blackface AB763 amp design.
The AB763 design is also to be found in some silverface amps between 19.
Vice versa; If you’re using the Normal channel, you can pull out the V2 tube.
All AB763-similar circuits (Deluxe Reverb, Super Reverb, Pro Reverb, Twin Reverb, Vibroverb, Vibrolux) are designed so that they share the cathode cap and resistor (25 u F/1500 ohm) and pulling one of the tubes will changes the effective value of the resistor they both share.
The later silverface circuits were changed further by CBS to become cleaner, harder and thinner sounding, specially if one compares amps at the same volume and EQ setting.
If you’re into sparkling clean tones, a silverface can do the job just as well as a blackface amp.Many players are stupid and increase the volume to compensate for the lack of spread and mids.This will introduce even more bass and sharp treble.While all these mods will not make a big difference on their own, together they will tame a Super Reverb to the Vibrolux/Deluxe Reverb area.You’ll need schematics to implement some of these mods. We usually start with explaining a mod from a functional perspective where we relate to components in the logical schematics diagram.The nature of the 4×10″ speaker configuration is a directional tone with screaming treble right forwards and backwards and unfortunately little spread.