Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html
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in keeping this site going.
I replaced the filament dropper with three Dale power resistors. The thermistor was replaced with a couple Ametherm 220 ohm in series to simulate the 400 ohm original.
I stuck a 15 ohm resistor in the CRT socket to simulate it's filament.
Success