Woodburner
New Member
Hi everyone, I need a 12v 5A supply to run an incubator. I've made up Ron J's thermostat with appropriate resistors, and while I could run that with his transformerless power supplly sircuit, I really want the heat source and fans to run at 12V too, and that needs more amps.
I thought I had a suitable transformer, rated 72VA 12V, (I found it in Dad's shed - Dad was a Marconi's research engineer. . .), but when I tested it (with a meter), it shows 12V to start, but dies rapidly. I can't see anything wrong with the coils so presume that the one and only component (rectifier? it's Russian) is the problem. Would it be possible to fix/replace this? I am on a tight budget, so can't afford to buy a complete new power supply.
I could also use some general information on transformers, and especially on rectifiers, and voltage regulation, or w/e it's called, too, as I have another tranformer, stripped of everything except the input and output wires.
Thanks for reading this. Hope you can help.
I thought I had a suitable transformer, rated 72VA 12V, (I found it in Dad's shed - Dad was a Marconi's research engineer. . .), but when I tested it (with a meter), it shows 12V to start, but dies rapidly. I can't see anything wrong with the coils so presume that the one and only component (rectifier? it's Russian) is the problem. Would it be possible to fix/replace this? I am on a tight budget, so can't afford to buy a complete new power supply.
I could also use some general information on transformers, and especially on rectifiers, and voltage regulation, or w/e it's called, too, as I have another tranformer, stripped of everything except the input and output wires.
Thanks for reading this. Hope you can help.