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Old 05-22-2007, 08:43 PM   #3
Jwill41
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Join Date: Aug 2002
Location: Farmers Branch, Tx
Posts: 1,009
Re: my cheap and easy tach

I am trying to do mine the same way with a older Sun tach that maxes at 5000 rpm. I can not get it to work right though. When I hook it up the needle jumps all over the place. It has a sticker on the back that says "use with model EB or WPA series transmitters" and it is a model ST-505. Anybody got any ideas about this?
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67 1/2 ton GMC short step side
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