...that a rectifier tube does not directly impact the tone of an amp. Well, whether directly or indirectly, my amp hasn't sounded as good since I replaced an original Amperex Bugle Boy with a modern tube. I'll have to look and see what the modern tube is, but for now my amp is not with me. The amp is an all original 1965 Fender Princeton non-reverb. I spent a little time looking into getting an NOS tube, but I couldn't seem to find the same one. Can anyone who has experience and who can relate offer me some suggestions or advice on a replacement? Thanks.