How often do you see a resistor with a violet multiplier?
This 100M resistor sets the bias on the 6BK4 HV regulator tube.
None of my meters go that high directly, but I can put my Fluke 27 in nano Siemens (conductance) mode where 1nS = 1,000M.
This allows measurements up to 100,000M ohms and it is off as are the associated 1.8 M resistors.
Luckily, 100M resistors are still readily available.
Now, this is a simplification of the HV circuits used in the chassis that came before and after. They used fixed resistors in place of a HV control.
It's been recommended by EM that the circuit be modified and a control installed like the ctc-7 chassis.
That's detailed in this thread. I will do that once (if) I get this set actually working.
https://antiqueradios.com/forums/viewtopic.php?t=425833
