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Hi Guys,
Has anyone ever hooked up a scope to the coil to see what the waveform is that is being sent to the electric tach?
 

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I have not done it. But thinking about it, should it be a regular wave. You know curved and what not. I know some guys like use a frequency generator to test tachs out with. Ya I would like to know as well. Cheers Neil.
 

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I know some guys like use a frequency generator to test tachs out with.
That is how I calibrated mine. Set it to square wave and measured with a frequency counter. I doubt that the signal at the coil is a "clean" square wave but I have had no reason to look at it.
 
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