On Friday, April 20, 2018 at 5:15:13 PM UTC-3, westdave wrote: > > Using a all spectrum electronics 4 digit clock chip outputting BCD > running from a lm7805 off a 12 vdc 3a Wall wart using cd4028 BCD counters > (also running at 12 volts ) a 1700 vdc high voltage power supply from three > neurons ebay site And transistor level shifters 12 v to 5 v Each high > voltage number output has a 1.2 meg resistor between the cd4028 output & > the tube pin per number, I am now Working now to reduce the heat from the > two 27 ohm resistors 2W across the 12 vdc > To give 1.1 filament voltage with a 6 volt bias > Mikes power supply is wicked good and works with a nimo tube >
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