Thread: 12V Charger
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Old 6th Dec 2014, 9:25 pm   #12
Radio Wrangler
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Location: Fife, Scotland, UK.
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Default Re: 12V Charger

The old transformer-rectifier-meter-crocclips jobs were a bit more sophisticated in the transformer department than might be apparent.

They were designed with a lot of leakage flux and a high-is open circuit output voltage so that they tended to look like current sources.

They were often connected to dead flat batteries that would take hours for cell voltages to come up... much longer than the thermal response time of the transformer in the charger. THe fuse was mostly to protect against reversed battery connection.

David
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