what does a KW master vibrator do?

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TBones12
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what does a KW master vibrator do?

Post by TBones12 » Mon Oct 14, 2019 5:24 pm

I noticed a KW master vibrator for sale and I have seen them before but it has one coil, what does it do?

Thank you in advanced!
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Rich Eagle
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Re: what does a KW master vibrator do?

Post by Rich Eagle » Mon Oct 14, 2019 5:40 pm

I found this and hope it helps.
http://www.mtfca.com/discus/messages/17 ... 1322828994
When did I do that?
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Re: what does a KW master vibrator do?

Post by JohnH » Mon Oct 14, 2019 7:42 pm

Early coils did not have a cushion spring which made it very difficult to adjust the coils for consistent firing, particularly when operating on magneto.
By using a master vibrator, the contacts in each of the four coils is bypassed, and the single contact in the master vibrator takes over the function. All coils fire the same as each other. Once the cushion spring was introduced, the master vibrator became unnecessary.
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Ron Patterson
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Re: what does a KW master vibrator do?

Post by Ron Patterson » Sat Oct 19, 2019 5:10 pm

Se attached diagrams contrasting a Model T engine with and without a Master Vibrator.
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Save-Master Vibrator Diagrams.jpg
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