Did Fender build some amps with tube rectifiers and some with SS ? Seems to be no rhyme or reason I can think of, except most of the low to mid powered amps had tube rectifiers ( champ to super reverbs ) and most higher powered amps had ss rectifiers ( BF Bassmans to Showmans ). There were exceptions, like the mid powered BF Bandmaster with 40 watts and a SS rectifier, except in the SF Reverb model, it's more like a Super Reverb, with a tube recifier. Even the blond Bassmans went from tube to ss rectifiers, but the Tremolux, Vibrolux, Deluxe and Supers kept the tube recifiers, along with the Princetons and Champs. It seems it would have been easy for Fender to switch to all ss rectifiers, like Marshall eventually did. And yeah, I know they did in the 80's, but I just don't understand why not sooner. Any ideas on this?