Less Straightforward Modifications
Besides the straightforward modifications, also some topological changes to the circuitry have been applied. Uptil now, two of the following modifications have been applied, and one is currently in development phase:
  • Mod1: Change the driver stage and phase splitter according to some ideas of Peter van Willenswaard.
  • Mod2: More improvements on Peter's circuit, and getting rid of some elco's.
  • Mod3: Some new developments: change the driver tube, cascode and apply current sources.