Want a FAT mid and a sparkling high end? This is our ECC803S V1 Option Retube Kit for the Dr Z. Galaxie. The kit contains a matched pair of the JJ 6L6GC's, a JJ 5U4GB, a Long Plate ECC803S for V1 and two JJ ECC83S's with one being current balanced for the phase inverter in V3.
All you need to adjust the bias on your amp is a bias probe and a multimeter or the Eurotubes "Pro One". All of these are are available in the "Related Products" tab. You can use the Generic bias video we did on a Marshall 800, the procedure is the same. The video below explains the difference between bias probe types.