29-01-2017, 11:01 AM
Not sure I remember but it may have been either a low watt or low current transformer maybe with a resistor in series. The idea was to simply heat a filament. I wanted to better understand parallel resistances with filaments. I found larger capacity batteries at low volt outdid higher voltage but low watt supply. I may have used a simple voltage divider to find a resistor gave out 6 volts and the other 3.
I recall to being very puzzled that one side of a heater filament circuit was showing continuity between LT+ and chassis. At least with the valves out I'd have expected only LT - to be at chassis potential and LT + to simply be a direct feed to the LT + terminal. Maybe a faulty valve pin holder.
Sometimes if I have doubts I will make a simple circuit up of torch bulbs or something.
I recall to being very puzzled that one side of a heater filament circuit was showing continuity between LT+ and chassis. At least with the valves out I'd have expected only LT - to be at chassis potential and LT + to simply be a direct feed to the LT + terminal. Maybe a faulty valve pin holder.
Sometimes if I have doubts I will make a simple circuit up of torch bulbs or something.
