When you put new tubes in most amps, you have to bring it to an amp tech to have him bias the power tubes for you… normally about a $75 job. If you get a Workhorse amp, you can say goodbye to your amp tech. As you can see in the photo, the back panel of the Workhorse amps has 4 holes in it; 2 for a screwdriver, 2 for seeing LED’s.
Once the amp is fully warmed up, you take the ceramic screwdriver provided with the amp (or any other Phillips screwdriver), put it through one of the lower holes and turn the pot inside until the LED above it turns green. If it turns red, the tube is biased a bit too hot. If the LED is off, the tube is biased a bit too cold.
That’s all there is to it. You can literally bias your power tubes in about 10 seconds with absolutely no knowledge of electronics required. |
