65 Formula S tach rebuild service

pishta said
@pbiggs, I fixed your board...maybe you can test it when you get it back? I don't have a way to test it but all components are good now.

Well, I connected the rebuilt tach board to my Barracuda tach....and the tach doesn't work.
I did the bench test using a 1.5 volt battery and the tach read 2000 rpm, so I guess the board is the culprit.
Thanks for the try, you never know unless you try.
Pat