AB165 to AA864 'plus' tweed preamp for BLACKFACE AB165 Bassman

This kit is specifically designed for BLACKFACE AB165 Bassman amps with the Blue ‘Molded’ signal caps!

It converts the phase inverter to classic AA864 specs (the same circuit as found in the classic blackface AB763 amps, such as the Twin Reverb, Super Reverb, Deluxe Reverb etc). It also converts the Bass channel to a tweed style preamp.
The major bonus here is that you get to keep all of the highly regarded Blue ‘Molded’ signal caps in the amp!! Doing both the AA864 conversion and tweed preamp mod, you can swap two signal caps from the phase inverter with two from the Bass channel and re-purpose these fantastic caps!!
NOTE: This will also work in the early silverface AB165 amps with Blue ‘Molded’ caps!

We now proudly offer NOS rolled foil/mylar signal cap upgrades for our this mod kit!  These selected NOS capacitors replace the standard ceramic caps used in our standard kits (as found in the original blackface amps).  The entire preamp signal passes through this one cap on the way to the phase inverter, and the quality of this one cap has a significant impact on the tone and performance of the entire amp. These NOS mylar caps bump everything up a few notches, giving you more depth and dimension (more of a '3D' sound), a bit more clean sustain, and more 'oomph' overall; with smoother, sweeter top end. Don't get me wrong, the ceramic version is excellent and true to the original blackface models!  But the NOS version is definitely a significant upgrade, giving you 'more of everything' we like about vintage Fenders!

All of our kits contain detailed instructions and diagrams!