Traynor YCV 40 Standard Retube Kit

The original YCV 40 amps prior to April of 2008 have a bias compensation circuit but it's just to balance unmatched power tubes. It does not adjust the plate current up or down, it is basically a fixed bias amp. These amps can use 6L6GC's in a moderate grade and the bias will be right where it should be. They can also use hot grades of the JJ KT77's to get the bias right and give a little more British flavor.

All YCV 40 amps post April 2008 are full adjustable bias. 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. These are available under the "Related Products" tab.

You can use our Generic Bias Video for reference.

The video below explains the difference between bias probe types.