Jefferson coil tester
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Topic author - Posts: 18
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- First Name: Jim
- Last Name: Boyer
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Jefferson coil tester
I have a Jefferson coil tester with the power source missing. Can anyone tell me what was used to provide the 6 volts for
Testing the lamps and coil. I would think it would be a step down transformer? Did it uses rectifier?
Thanks for your input in advance.
Jim
Testing the lamps and coil. I would think it would be a step down transformer? Did it uses rectifier?
Thanks for your input in advance.
Jim
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Re: Jefferson coil tester
6 volt lantern battey.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Re: Jefferson coil tester
I don't know exactly what was used, but either a 6 volt auto battery or a stepdown transformer ought to work. A transformer with a 6-8 volt secondary would be suitable, and to test coils, it would need to be able to deliver about 2-3 amps at the secondary. Light bulbs don't care about AC or DC or polarity, but a coil will behave a little differently on 60 cycle AC as compared to clean DC, such as that provided by a car battery. An older battery charger with a 6 volt setting would provide 6-8 volts DC, probably a pulsed DC, rectified, but not filtered. The new type chargers usually have no 6 volt setting, and they use solid state regulation and safety features to prevent shorts and improper polarity connections. I suspect that they would not work well on a T coil. A full wave, filtered rectifier is a fairly simple device, but I don't know where you'd get parts today to build one.
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Re: Jefferson coil tester
If a lantern battery works, thats the ticket.
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Re: Jefferson coil tester
A
Four D cell batteries in series r its will work just as well.
Four D cell batteries in series r its will work just as well.
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Re: Jefferson coil tester
How much current can a new size D cell provide?
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Re: Jefferson coil tester
This is out of a pieces/parts tester I picked up at Hershey several years ago, it has six leads coming out of it. I believe the two reds are 110v and the other four are six or twelve volt. I tried at that time to test it but kept blowing the fuse on my test outlet. I've got a couple of older doorbell transformers I might try instead. Jim
Measures about 2 1/2"X 3" and maybe 2" thick.
Measures about 2 1/2"X 3" and maybe 2" thick.
Back road kinda guy stuck on the freeway of life.
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Re: Jefferson coil tester
Here is a schematic I made when I restored mine.
Respectfully Submitted,
Be_Zero_Be
I drive a Model T ... Microseconds don't matter
For every Absolute Model T Fact there are at least three exceptions.
Be_Zero_Be
I drive a Model T ... Microseconds don't matter
For every Absolute Model T Fact there are at least three exceptions.
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Re: Jefferson coil tester
It looks like the operational test applies 6 volts AC at 60 cycles. I assume the lamps are for continuity testing. The 18 volt tap is unused. It could be used to "high-pot" a coil to simulate operation on MAG.
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Re: Jefferson coil tester
Thanks for the diagram Bob. Jim
Back road kinda guy stuck on the freeway of life.
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Topic author - Posts: 18
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Re: Jefferson coil tester
I want to thank you guys for the information regarding the Jefferson. Coil tester. I can see I am missing
A transformer of some sort. I think I will use a small transformer, maybe 6 /12 volt unit. I realize the tester
Is basically a go- no go device but I just wanted to restore it as a working novelty.
Jim-B
A transformer of some sort. I think I will use a small transformer, maybe 6 /12 volt unit. I realize the tester
Is basically a go- no go device but I just wanted to restore it as a working novelty.
Jim-B
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Re: Jefferson coil tester
A transformer from an older 5 to 10 amp 6-12 volt battery charger would be a good choice. The crackerbox 6-12 V chargers used to be cheap, but I suppose that's changed. These newfangled chargers are so smart and safe they would probably shut down, take over your mobile device, and report you if you to federal authorities if you attempted to do anything out of authorized protocol with one.
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Re: Jefferson coil tester
If the bulbs are simply continuity testers, you could use 12 volt bulbs and then you wouldn't need the 3 volt tap.