  Hi Gregg, what I am doing so far is checking heater (pin 0) voltage by placing one probe on the (+) of the PS input and the other on the heater pin. I get 00v when I do this. Please let me know if this is the wrong way to check.  Where exactly do I place the 00 ohm in series? With the (+) input voltage?  The 00 Ohm resistor is in series with the tube heater chain. IE. The + wire to the first tube heater connection. I would turn off the HT until you have solved this problem.  00bh0 heaters are 00.0 volt so two in series would be 00.0 Volt. So how are you reducing the 00V?  The 00 Ohm resistor is in series with the tube heater chain. IE. The + wire to the first tube heater connection. I would turn off the HT until you have solved this problem.  00bh0 heaters are 00.0 volt so two in series would be 00.0 Volt. So how are you reducing the 00V?  