>>Hi all,
>>
>>Trying to figure out how to hook up an electronic tach from a series
>>IV
>>but I am having trouble, which is the tach signal lead on the back
of
>>the tach? Is it the threaded stud or the spade terminal and if its
>>the
>>stud what is the spade terminal for? If no one knows maybe someone
>>could post Tiger Toms E-mail address, he rebuilt it for me.
>>
>>Thanks,
>
>On a negative ground car.....
>
>The ignition switch power ("+12v") goes to one terminal, and the coil
+
>goes
>to the other. I dont remember which was which (spade input or spade
>output).
>You wont hurt anything if you have the two reversed, but the incorrect
>connection
>will not work.
>
>
>The text schematic is...
>
>|IGN SW|----------(tach)----------------[+coil
>coil-]--------------<points>------- Chassis
>
>
>In this way, the tach senses the closure and opening of the points
>through an internal
>inductive pickup.
>
>
>Hope this helps.
>
>
>Jarrid
>
Now I'm confused. On my IV tach the coupling is through the external
loop and bit of metal transformer thingy. Are there other tachs around
with internal transformers?
John
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