Quote:
Originally Posted by bandersen
No wonder the transformer got so hot - you were basically shorting it out.
Saying 6.3 volt heater load is meaningless. What is the current or resistance?
Since this load is so light, better to adjust calculations for 8.5 volts.
(8.5 - 0.55)V / 0.06A = about 130 ohms. Wattage = (0.06 * 0.06) * 130 = 0.5.
Use a 1 watt resistor to be safe. Carbon comp, metal film, wirewound. Makes no difference.
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So if I use a 130 ohm resistor in series and then check the voltage it will show the full voltage at the resistor but putting it on the heater if it drops to where it should be what happens with the initial surge to the heater it could open ?