View single post by edward_davis
 Posted: 01-31-2006 04:53 pm
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Joined: 07-06-2005
Location: Eugene, Oregon USA
Posts: 162
I have replaced the insides of my original Smith's tach (RVI 1439/O3A) with those from an MGB tach I bought on e-bay (RVI 1439/O1A).  The ad said it was in working condition, and there seems to be no problem with the meter itself, like my old one was having.  We'll see when I get her all hooked up this weekend.  Interestingly, there were only two differences in the gauges, except for the design of the faceplate.  The MGB gauge was oriented upside-down relative to the JH gauge (the faceplate attaches 180 degrees).  And there was no mystery capacitor in the MGB gauge.  I did not check to see if the resistors were the same, though, and the potentiometer was of a slightly different design.  Hopefully it'll work.