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Post by sawnami on Feb 6, 2018 8:11:27 GMT -5
I refurbished a 100-year old Model T Ford coil recently. I remembered that there was a way to use it as a coil tester by using the primary side of it to trigger a coil. After a few trys, I got it figured out. The first video is the Model T coil by itself and the other is using it to trigger a test coil. youtu.be/f81eh6C5f8Eyoutu.be/e9rcUJh5poU |
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Post by tjthechainsawmech on Feb 6, 2018 10:32:23 GMT -5
I was gonna say just use your tongue....but that might fry it. lol
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Post by jerseyhighlander on Feb 6, 2018 13:41:11 GMT -5
I refurbished a 100-year old Model T Ford coil recently. I remembered that there was a way to use it as a coil tester by using the primary side of it to trigger a coil. After a few trys, I got it figured out. The first video is the Model T coil by itself and the other is using it to trigger a test coil. youtu.be/f81eh6C5f8Eyoutu.be/e9rcUJh5poUVery cool. Care to explain the mechanics of how it works? What constitutes a pass or fail? |
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Post by sawnami on Feb 6, 2018 22:13:11 GMT -5
I refurbished a 100-year old Model T Ford coil recently. I remembered that there was a way to use it as a coil tester by using the primary side of it to trigger a coil. After a few trys, I got it figured out. The first video is the Model T coil by itself and the other is using it to trigger a test coil. youtu.be/f81eh6C5f8Eyoutu.be/e9rcUJh5poUVery cool. Care to explain the mechanics of how it works? What constitutes a pass or fail? This link explains it better than I can. www.princeton.edu/ssp/joseph-henry-project/spark/ford-model-t-buzz-coil/A battery is connected to the ground contact on the bottom of the coil box and the positive to the upper contact on the side of the box with a momentary switch in the wire. The secondary output is from the bottom contact on the side of the box. To test a coil, you connect the primary post on top of the Model T coil to the primary terminal or one wire of the test coil and ground the frame or the other wire from the test coil to the battery negative. You then connect the secondary wire from the test coil to the spark plug which is grounded to battery negative. Just push the switch to start and stop the input to the test coil. An adjustable gap spark tester will give you an idea of the strength of the spark. I scribbled out a diagram.  |
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Post by jerseyhighlander on Feb 7, 2018 1:24:22 GMT -5
That's awesome, thank you. One more thing on my shopping list for the upcoming spring auto swapmeet.
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Post by sweepleader on Feb 7, 2018 7:50:13 GMT -5
I have a setup that I used to use to test car systems, Chryslers in particular, back when cars were testable. Its basically the same thing as the Model T coil but uses only a normally open momentary switch and an automotive condenser. I hooked the condenser across the momentary switch like it would be with points and connected a wire with an alligator clip to each side of the switch/condenser assembly.
It is used by connecting one clip to 12v+, the other to the coil. The second coil connection or frame goes to 12v-. Each press of the switch gives a spark with a good coil. The Model T gives lots of sparks and may be more positive in use. The switch should not be closed for too long as current could be excessive.
I will try to remember to get a picture of it.
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Post by sweepleader on Mar 31, 2018 15:36:04 GMT -5
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