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Re: 78' Electronic Tach Wanted

To: "George Pasek" <pasek001@umn.edu>, spitfires@autox.team.net
Subject: Re: 78' Electronic Tach Wanted
From: doug@dougbraun.com
Date: Fri, 14 Oct 2005 14:17:53 -0400
Possibly you could get a new or used generic aftermarket tach, rip out its 
circuit board,
and install it in the Smiths tach?

Doug Braun
'72 Spit

At 11:44 AM 10/14/2005 -0500, you wrote:
>Hello...
>
>The Smith electronic tach in my '78 is in need of replacement.  At 3500rpm it
>is reading 4500 and it varies.  I know that there is suppose to be a
>calibration adjustment on the back, but the PO told me that It had died once
>on him and he repaired a cracked PC board in it and also replaces a few of the
>capacitors.  Apparently it is using a op-amp chip that is either unmarked or
>does not translate into a common number and there was also something about it
>not having a standard 8, 14, 16 pin configuration.
>
>So if someone has a known good one that they are willing to part with or if
>there is a schematic out there somewhere I'd like to hear about it.


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