Posted by Sherman in Idaho [108.162.245.23] on Saturday, July 02, 2016 at 03:04:08 :
In Reply to: Re: Tach hookup posted by Jerry in Idaho [162.158.68.47] on Thursday, June 30, 2016 at 14:33:54 :
Did they even have electronic tachs back in the 6V days? I thought in the 6V days tachs were A) uncommon and B) only mechanical.
If it really is a 6V electronic tach, I would be wary of hooking it up to a 12V system unless I traced out the schematic and looked up the specs of the semiconductors first. Anything that old probably used germanium transistors and diodes and might not be able to take higher voltage. May well be positive ground too. It would be real easy to fry it before you even knew anything was wrong. But 30 years old isn't very old, and odds are it's a 12 volt tach.
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