"Ft.peoplepc.com"


But the resistor that burned in this amp was the 2.7K 10W that normally
only
dissipates about 2W.


** Nope.

See:

http://www.blueguitar.org/new/schem/fender/the_twin.gif


When the amp is used in "low power" mode, the voltage across that 2.7
kohms rises to circa 100 volts - makes it dissipate 4 watts.

PLUS it is mounted on a PCB, side by side and in contact with the very hot
running 30 kohms one.

PLUS there is SFA air flow in the chassis.

Once the 30 kohms is on its own, bolted to the chassis, life is sweet for
the 2.7 kohms one.




......... Phil