I bought a Marquette 39-100 battery charger at a sale yesterday. It appears the rectifier is not working. I get 12 volts DC output at maybe a few amps but if I switch the voltmeter to AC I have about 6 volts. Took the rectifier off and it looks as if it has been hot. The transformer has aluminum windings but does not appear to have been hot. I didn't pay too much for this thing but would like to learn to troubleshoot. I would also like to understand HOW a rectifier (like the one that has plates in this machine) works. The plates appear to have a soft metal coating. This one also has a center tap which is wired to the one side of the output the other 2 wires go to the transformer. Is this the 6 volt/12 volt part of the system. Thinking I know about just enough to make trouble but gotta try to learn.
Thanks,
Andy
Thanks,
Andy