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RE: More questions regarding voltage regulator tubes

Posted by shane. on August 4, 2017 at 01:36:19:
Vs 230VDC drop to 150V = 80V, so your calculation should not based on a 230V drop, but rather the 80V. (good news for you).
Load current is 10mADC
You have 10mA load current. Choose 15mA through the VR shunt, 25mA total.
And if you pull the load the VR tube can sink this 25mA with no problem, OK. We are talking DC current here.
If you want to drop 80V at 25mA = 3k2 (3k3) power dissipated is the DC current squared multiplied by the resistor value. In this case (0.025 x 0.025) x 3k3 = 2W. Use a 10W wire wound resistor and be done with it.

Shane.