I have a d5-100w black and white crt I want to use in an oscilloscope clock it will work only problem is the heater voltage is .055 volts, .060 Ma so the question is the source on the clock board is 6.3 volts so would a resistor be able to take the voltage down to a half volt or maybe use a small transformer and use the 6.3 source on the primary of the small transformer. Any thoughts....
