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Tool Talk Discussion Forum

Re: 48v delco alternator?

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John T

06-03-2013 18:47:16

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Despite those who say NO, I still say YES its possible to do that, and I just remembered at one time I had a device (maybe from JC Whitney???) where you took a car alternator and wired it to ths black box and it could be used to power even 120 volt (say perhaps a Universal AC/DC Motor) let alone 48 volt devices........

I still vote YES its possible

John T

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36 coupe

06-04-2013 02:40:47

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 Re: 48v delco alternator? in reply to John T, 06-03-2013 18:47:16  
I have the booklet that describes the regulators.The devise you had contained a double pole double throw switch and an ac outlet.I have one under the bench.My 13v regulator had fewer parts.Simple to make.A heat sink, a power transistor and 6 other parts made a regulator.I used a 5hp briggs to spin the alternator.It was a heavy rig because you needed a 12 battery to supply rotor voltage.When the battery got low you threw the switch to charge.People are so used to mooching stuff for free they wont buy books now.Lindsay had booklets on running 3 phase motors on single phase power.Lead acid batteries,Making welders.I built a DC converter for my Lincoln 225 using information from the welder booklet.The Lejay manual is a good reference book even though it is dated.I bought a Lejay manual in the 50s.The Lejay Co sold aircraft generators and welders made from them.When Lindsay did a reprint I sold copies of it.I kept the last new copy I had.My old copy was well worn.To those who say it cant be done Ive all ready done it.There is a co making welders with alternators now.

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George Marsh

06-04-2013 05:33:26

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 Re: 48v delco alternator? in reply to 36 coupe, 06-04-2013 02:40:47  
36 coupe,
I had a 1966 cuda. The voltage regulator was a single relay that would burn out in 10-12k. In the early 70's crysler used an external solid state reg which was a power transistor. I had to un-ground the one brush and send it to the collector of the NPN power transistor, emitter went to ground and the base voltage determined how hard the transistor conducted.

I'll google Lejay Co and see if there is something I can use.

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36 coupe

06-04-2013 17:13:43

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 Re: 48v delco alternator? in reply to George Marsh, 06-04-2013 05:33:26  
Lejay Co is long gone but still a good read if you can find the manual.I have the Chrysler relay in the shop and thers a transistor version out in the shed.I dont have the same interest I had 30 years ago.You could put new brushes in the early Chrysler alternator in a parking lot to get it charging again.

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