Well it's a lonnnng story....but in short....I'm working on a Ducati 250.
Originally 6V, with a permanent magent alternator. Couldn't find a 6v
rectifier/regulator for love or money, so I figured WTF, I'll just put in a
12v reg, rect. and a 12v battery, seeing as how the alternator is putting
out between 12 and 42V AC. That leaves the 6V coil. Now I have to rethink
the wisdom of converting to 12V......I don't thing I'll have a problem with
the alternator, but I didn't think I'd have a problem with the coil, now did
I????LOL!
Am I gonna burn the alternator?
Geoff Branch
----- Original Message -----
From: "Paul Asgeirsson" <pasgeirsson@worldnet.att.net>
To: "Geoff Branch" <gjbranch@comcast.net>; "Spridgets"
<spridgets@autox.team.net>
Sent: Sunday, July 09, 2006 9:44 PM
Subject: Re: calling electrical engineers...
> That's pretty close to what you're using now. Most resistor type coils
> are
> designed to run on less than the nominal 12 volts of your car system.
> When
> the resistor is cold, it passes higher voltage, such as the 12 so the coil
> has a hot spark, much needed at cranking speeds. As the resistor heats
> up,
> it passes less voltage, until it might be as low as 8 volts. The coil
> functions fine at this voltage as that's what the design spec is. Car
> runs
> fine with the coil spark at this level, also.
>
> I'm aware of Ford using this system as early as 1933. Might be sooner
> than
> that for all I know. Anyone remember before that time??? LOL!! It went
> from 6 volts to 3 volts on the coil.
>
> So why are you wanting to use a 6 volt coil on 12 volts? Because you have
> one?
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