hooking up an output transformer, correct phasing

[cjenrick]

you know i think you are right, here is a good thread that explains this complicated inverter>

http://www.fenderforum.com/forum.htm..._number=645399

bottom line: since the NFB is being applied to both the grid and cathode of bottom triode, the net voltage is zero. however since it is being applied to the cathode of the upper triode and not the grid, the top cathode will see the positive phase of NFB as cathode degeneration or a net voltage that equals NFB.

now for the 64 dollar question, if the two triodes are running 180 out of phase this would mean the cathode voltages would cancel, so how is the lower triode modulated?

[loudthud]

now for the 64 dollar question, if the two triodes are running 180 out of phase this would mean the cathode voltages would cancel, so how is the lower triode modulated?

Kind of an odd situation. (Small signal) The triode with the more positive input pulls the other's cathode higher. When the other triode's input is higher, it "wins". So you get sort of a double frequency slightly distorted looking sine wave. For larger signals big enough to cause clipping on the output the distorted wave on the cathodes looks worse. More like ice cycles hanging from a tile roof.