View single post by subwoofer
 Posted: 06-22-2021 06:32 am
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subwoofer

 

Joined: 04-01-2008
Location: Sandefjord, Norway
Posts: 617
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 Hehe, I should have added a "YMMV" after "no problem". I find soldering surface mount electronics easier that through-hole, particularly when modifying circuits. I guess it's just what I have the most experience with.

As for the stock tach, if I remember correctly there is an electrolytic capacitor in there, that one will have nowhere close to it's original capacity by now. Also, the solder joints and the PCB are all likely to be well flaky by now.

If the needle sits at 0 and jumps into life when you tap the tach, I would say the problem is electronic. If it freezes or seems to stick in any random position and tapping it gets it going again the problem is mechanical - it needs a clean.

Tweaking the calibration screw will be very unlikely to improve matters.

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Joachim