This is a very handy tool to own. It's a variable power supply and battery charger with 2 ranges, 0-8 volts, and 0-16 volts. I bought mine at the local surplus store, thinking it was a working unit. It turned out it wasn't and it only put out 5 volts, which dropped to 3 volts after a couple minutes. I did some serious cleaning, and got mine to look as nice as this one on ebay. I took the case off and checked the transformer and selenium rectifiers. The rectifiers were bad, and I found a pair of full wave bridge rectifiers for only $2 on ebay, but had to wait a few weeks for them to come form China. I tried to buy local, but with Radio Shack and my favorite electronics surplus store both gone, that pretty much only leaves ebay to find many parts.
I tried to find a matching pair of selenium rectifiers, but could only find small ones with large prices. I mounted the bridge rectifier to a 3" x 6" piece of aluminum to act as a heat sink. The new rectifier is rated 1000 volts and 25 amps, which you can see I marked it in the picture. This is a handy tool to use for testing cutouts, generators, blower motors, lights, horns, etc. because you can control the voltage and monitor the voltage and amps without having to wire up additional gauges.
BTW, the selenium rectifier is what usually goes bad in older battery chargers, and can be easily fixed by replacing it with a diode or two.
Here's 4 pictures of my repair and a link to a nice looking one on ebay. My last picture shows me testing a 6 volt blower motor, and it draws 5 amps at 6.2 volts.
BTW, that large capacitor is to give a smoother output, more like that of a battery.
https://www.ebay.com/itm/EICO-BATTER...8AAOSwfpVZFfzs
I tried to find a matching pair of selenium rectifiers, but could only find small ones with large prices. I mounted the bridge rectifier to a 3" x 6" piece of aluminum to act as a heat sink. The new rectifier is rated 1000 volts and 25 amps, which you can see I marked it in the picture. This is a handy tool to use for testing cutouts, generators, blower motors, lights, horns, etc. because you can control the voltage and monitor the voltage and amps without having to wire up additional gauges.
BTW, the selenium rectifier is what usually goes bad in older battery chargers, and can be easily fixed by replacing it with a diode or two.
Here's 4 pictures of my repair and a link to a nice looking one on ebay. My last picture shows me testing a 6 volt blower motor, and it draws 5 amps at 6.2 volts.
BTW, that large capacitor is to give a smoother output, more like that of a battery.
https://www.ebay.com/itm/EICO-BATTER...8AAOSwfpVZFfzs
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