I kinda knew that. The main idea flash @ the time was to be able to run and listen to some 300B's I bought cheap. From everything I've been reading, most people prefer the 2A3 tube. If it sounds like the 300B will be a clear winner, I'll change parts to adjust for the 300B's. If I had a place to post some pictures, I would. I'll have to look into that. Thanx for the encouragement.