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#13
July 22nd 07, 07:15 PM
posted to uk.radio.amateur,rec.radio.amateur.misc,rec.radio.amateur.homebrew
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How to make a 3 Dollar Battery Charger
In article ,
Mick wrote: On Sun, 22 Jul 2007 10:33:37 +0000, Mike G4KFK wrote: On Sat, 21 Jul 2007 00:12:59 +0000, RMS wrote: "Dr.Ace" wrote in message ... 3 Dollar lead acid Battery Charger http://www.alpharubicon.com/elect/3dollarbattggn.htm Don't try this at homes with 240V AC, kiddies! ...even though it works if you pick a lower wattage bulb to keep the charging current down. Not a good idea really. :-) I've used series lamps a few times when testing "unknown" valve gear as it helps keep the "holy smoke" inside the transformer box. Cheaper and less noisy than fuses. I use a variac and monitor the current as I turn it up. Al |
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