J Jamier Member Aug 10, 2025 #1 What would the values of dropping resistors for the AC heaters need to be to allow for a tube that has a 0.6 A heater draw? Jamie
What would the values of dropping resistors for the AC heaters need to be to allow for a tube that has a 0.6 A heater draw? Jamie
Paul Birkeland Moderator Staff member Aug 12, 2025 #2 With lower voltage stuff like this, it's helpful to measure for your specific situation and see where your voltages land. If you're within 10% of 6.3V, I wouldn't adjust the resistors.
With lower voltage stuff like this, it's helpful to measure for your specific situation and see where your voltages land. If you're within 10% of 6.3V, I wouldn't adjust the resistors.
J Jamier Member Aug 13, 2025 #3 Thanks PB, Just to be sure, if I want to measure this I would put in the tubes in question, clip lead the heater pins on the socket and measure AC voltage? Jamie
Thanks PB, Just to be sure, if I want to measure this I would put in the tubes in question, clip lead the heater pins on the socket and measure AC voltage? Jamie