Harmonic Distortion Mod

Amplifiers contain voltages high enough to Kill you even after the amp has been powered Off !!! If you don't have enough electronic experience to identify and discharge the Filter Capacitors which contain these Deadly voltages, take your amp to a Qualified tech. If you don't know a qualified tech in your area, post a request in the alt.guitar.amps newsgroup, the folks there will be happy to help you.

The Mod:

In small amounts Harmonic Distortion can actually be a Desirable addition to your amp's tone. This mod allows you to add or remove harmonic distortion at will, as well as allowing you to easily bias unmatched tubes.

1. Remove the single bias adjustment pot in your amp.


2. Install small cathode resistors and separate bias adjustment pots for each output tube.

Now you can slightly "Unmatch" the power tubes via the new separate adjustment pots to add harmonic distortion to your amp. And even if harmonic distortion isn't your thing, the extra adjustment pots allow for more exact and easier biasing of matched or unmatched power tubes.