At 05:33 PM 3/11/2007 -0400, TChirhart wrote: >I'm also restoring a nice Gonset Model 500W amplifier, uses quad 807's. 125 watts output from an 807????????? I don't think so, Charlie; at least, not in any linear class ;o\ But maybe from an 811. How many pins do the tubes have? 811s have four pins, 807s have five. Steve, K0XP