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Old 01-31-2020, 03:16 AM   #21
flatheadmurre
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Default Re: 6 volt/12 volt jump box

You could build a jumper cable with a solenoid on it and a remote starter button.
That way you can jumpstart from any 12v source available directly to the starter.
Using you battery for the ignition (since leadbatteries recover there is usually enough to run ignition after waiting a bit).
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Old 01-31-2020, 09:34 AM   #22
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Default Re: 6 volt/12 volt jump box

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Originally Posted by 51 MERC-CT View Post
Whenever I had to use a 12 volt battery to jump start my 6 volt cars I would do so by connecting the ground side to somewhere convenient on the engine block (not the battery) and then momentarily touch the starter side of the solenoid or directly to the starter cable lug on the starter.

……...which exposes only the 6v STARTER to 12v, which many of us get away with for years on end anyway. DD
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Old 01-31-2020, 10:02 AM   #23
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Default Re: 6 volt/12 volt jump box

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Last edited by tubman; 01-31-2020 at 10:08 AM.
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Old 01-31-2020, 10:17 AM   #24
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Default Re: 6 volt/12 volt jump box

Hooked-up the way 51 Merc described passes 12v current ONLY through the starter and to the grounding point. The ONLY place you'll see 12v is the measured differential between the two jumper cables. The radio/lights are essentially in a completely different circuit. The key here is hooking-up to the STARTER side of the solenoid. Same difference as connecting one cable to starter lug, and the other cable to the starter case. You will NOT see 12v anywhere else in the system. DD
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Old 01-31-2020, 10:18 AM   #25
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Default Re: 6 volt/12 volt jump box

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...

I knew you knew better. Sometimes, that second cup of coffee really helps. DD
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Old 01-31-2020, 10:33 AM   #26
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Default Re: 6 volt/12 volt jump box

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So, I did it wrong once and lost my radio.

(I was just gonna reinforce what "51 Merc" said, but you beat me to it.)
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Old 01-31-2020, 10:33 AM   #27
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Default Re: 6 volt/12 volt jump box

Y'all ever thought about the everyday 6v/12v conflict that occurred umpteen times a day way back when? Neighbor's '49 Ford battery (6v) is too weak to crank the old flathead over. Since SHE is so good looking (and a really NICE person, too), I decide to give her a push with my new '55 Chevy (12v). When both bumpers line-up and touch, we now have a COMMON ground between 6v POS ground system and a 12V NEG ground system. Even with this common ground, the fact remains that electrically, you have two separate circuits that have no detrimental effect on each other. DD
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Old 01-31-2020, 02:09 PM   #28
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Default Re: 6 volt/12 volt jump box

Thanks for the help/advice. Gave up on the idea and picked up a 6v/12v charger/maintainer at AutoZone today (Schumaker).
Thanks again.
Paul in CT
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Old 01-31-2020, 02:10 PM   #29
1931 flamingo
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Default Re: 6 volt/12 volt jump box

Gave up on the original plan. I picked up a 6v/12v battery charger/maintainer at AutoZone today (Schumaker).
Thanks again for the help and advice.
Paul in CT
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Old 01-31-2020, 02:55 PM   #30
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Default Re: 6 volt/12 volt jump box

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19fordy: I'm still 6 volts.


Paul
What are you running for solid state ignition on 6 volts? I wasn't aware that there was a 6 volt solid state conversion?
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Old 01-31-2020, 09:27 PM   #31
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Default Re: 6 volt/12 volt jump box

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Old 02-01-2020, 09:27 AM   #32
1931 flamingo
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Default Re: 6 volt/12 volt jump box

Pertronix.
Paul in CT
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