Not Ranked
I took my Smith's tach to a lady in Albuquerque with a business that has a ton of customers. She restores old instruments for vintage cars as well as newer ones. They put my tach on the bench and hooked it up to a signal generator that simulates actual operation, no dizzy involved.
The name of the business is MO-MA, the owner is Margaret Lucas (wow, what's that about?), phone number is (505) 766-6661.
I have no idea whether she'll tell you what they use, but it's worth a try.
By the way, she fixed my Smith's tach and gave me a wiring diagram to use with my MSD so it would work in the car. It did.
Paul
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