[KCMike]

Here is a good tube data chart you can use to find all the tubes.
http://www.nj7p.org/Tubes/SQL/Tube.php
I haven't pulled the chassis yet on mine so I don't know the voltage drop across the field coil.
But just to guesstimate> lets say the total mA is 64.1 using just one 41 tube, and voltage drop is 100v that comes out to:
1562 ohms.
How did you determine your volt drop across the field coil?
I see Terry called out while I was typing. I always listen to him.