Fryette Two Fifty Two Power Amp Standard Retube Kit

The bias pots are accessed from the top of the amp. We use bias probes to test and set the bias on these amps. You can bias one tube on one side and then one tube on the other side. All you need to check and adjust the bias is a bias probe and a Multimeter, or our all-in-one Eurotubes "Pro One" bias probe that reads both the plate current and the plate voltage simultaneously.

You can find all these under the Related Products Tab. 

You can use our Generic Bias Video for reference.

The video below explains the difference between bias probe types.