***Argh! I made a mistake. In my zeal for simplicity I overstated the longevity of the simple three tube compliment in Champs. Many of my august comrades here (thank you, sincerely) pointed out that the earliest Champs had an octal, 6SJ7 preamp tube, which is absolutely correct. Mea culpa. Thanks for helping a brother out...and thanks for watching with such a keen eye.