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Old 09-19-2019, 06:50 PM   #6
Pete
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Join Date: May 2010
Location: Wa.
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Default Re: Ol man thinkin & seeking to learn

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The only way to be sure what you have is with a capacitor checker that checks it with voltage applied. First, you need to know what capacity is required for the coil you are using.
If you are using ALL original TYPE numbered catalog parts, matching the numbers up will usually get you by.
If you have an unknown coil, matching a proper capacitor to it is either guess work or requires some lab equipment the average mechanic does not have or can not afford.

Technically, the capacitor has to have the right value to tune the coil primary circuit to resonance. This results in the longest possible point life.
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