Compare to a Fender AB763 Non-reverb. Also compatible with a Dumble-style UltraPhonix. For an example of a Dumble UltraPhonix-style build, check out my blog post https://www.thetonegeek.com/single-post/crafting-the-ultimate-tone-building-a-dumble-ultraphonix-bandmaster-inspired-by-john-mayer-s-dead
 
Note: On v1.0 preamp boards Trebel-1 and Bass-3 labels are reversed. So Treble-1 wire should go to Bass-3 on the board, and Bass-3 wire should go to Treble-1 on the board.