filament DC reference

[bigsmitty]

Make a voltage divider comprised of a 470K and a 47K or a 56K resistor from the screen node to ground. Strap a 10uF or higher @ 100V filter cap across the grounded resistor. The node where the two resistors connect together is your heater CT reference.

The 470K gets connected to the screen node...the smaller resistor gets connected to ground, then the two connect together. Use 2 watt resistors for both.

THANKS! This forum is Awesome! Sorry for the ignorance but where exactly is the screen node?
Amp is 5f1 circuit with the bixed -bias mod as described in Gerald Webers book. Am using Magnetic Components PT that has heater CT. Thanks, You guys Rock!