Traynor YBA-1A Post Phase Inverter Mod:
Installed:
Installed this lovely Post Phase Inverter back in 2010. Affectionately known as the "Rich Mod", installed in a YBA really allowed the customer to throttle this amp and get more groovy tones at lower volumes. These amps were tone secrets for years as the circuit is based off a JTM-45/Tweed Bassman. Note the Philips "mustard" caps.
Finished off the mod with a Marshall-style knob. Turned to the right like this pulls the MV out of curcuit and allows the amp to function as normal.
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