Hello,

I am restoring an "old" drake TR-6, I just noticed a 100 ohm resistor
connected between pin 1 and pin 7 of
the three 6JB6 finals. I understand these two pins are both connected
internally to the screen grid, so
I wonder what's the purpose of those resistors which should just be
shorted by the internal connection
of the tubes. Looking at the TR-4 schematics I saw they have 68 ohm
resistor in the same place, so it
surely has a meaning but I can only guess it's a sort of protection in
case of a failure.
Does anyone know what they are for?
Thanks and best 73

Francesco IS0FKQ