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<div class="moz-cite-prefix">The later Smiths/Jaeger gauges in many
UK cars, and in the later AH for that matter, are bimetal operated
gauges, a current regulated by the variable resistor in the sender
heats a bimetal which will react in bending, driving the needle
pointer, however it reacts very slowly hence a stable reading.
These are fed by 10V provided by a small regulator somewhere
behind the dash. They have a ca. 90º window over the scale.<br>
The early ones are coil operated which react instantly. A
capacitor to damped the reading is a good idea.<br>
Kees Oudesluijs<br>
<br>
<br>
<br>
Op 10-2-2017 om 23:29 schreef <a class="moz-txt-link-abbreviated" href="mailto:dwflagg@juno.com">dwflagg@juno.com</a>:<br>
</div>
<blockquote
cite="mid:20170210.172958.22737.0@webmail13.dca.untd.com"
type="cite">
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<div>Hey Simon,</div>
<div> </div>
<div>The Triumph Spitfires and GT6, I believe, had voltage
stabilizers for the fuel gauge. Maybe they could be used in a
Healey? I would defer to Michael for an answer.</div>
<div> </div>
<div>Cheers,</div>
<div> </div>
<div>Doug<br>
<br>
Hi Simon, I think that keeping any sort of energy storage
device well away from the fuel gauge circuit is sage advice.</div>
<div dir="auto">I would suggest that you try this:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.netbug.net/blogmichael/2015/09/06/smiths-and-jaegar-fuel-gauge-solution/">http://www.netbug.net/blogmichael/2015/09/06/smiths-and-jaegar-fuel-gauge-solution/</a><br>
Michael S<br>
BN1 #174</div>
<div><br>
<br>
<br>
</div>
<div class="gmail_quote">On Sat, Feb 11, 2017 at 7:29 AM +1300,
"Simon Lachlan" <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:simon.lachlan@homecall.co.uk" target="_blank">simon.lachlan@homecall.co.uk</a>></span>
wrote:<br>
<br>
<blockquote class="gmail_quote">
<div dir="3D"ltr"">
<div class="WordSection1">
<div class="MsoNormal">Hi,</div>
<div class="MsoNormal">I’d saved something relating to
damping the fluctuations in my fuel gauge. I don’t
recall if it was originally posted here or if I trawled
it off the net. I’d made a few notes and filed it
appropriately against some day in the future when I
might get round to actually doing it.</div>
<div class="MsoNormal">So, my nephew’s fuel gauge bounces
around far more than mine and this prompted me to dig
out the article/notes.</div>
<div class="MsoNormal">First off, I agree that there’s no
sense in putting the capacitor anywhere near the fuel
tank.</div>
<div class="MsoNormal">Having said that, I read the advice
that I’d stored so carefully and began to wonder if I’d
understood it correctly.</div>
<div class="MsoNormal">Is the capacitor really supposed to
be wired across the two terminals on the gauge? Would it
have any effect? To put it crudely, but in the language
that I can understand, wouldn’t the fluctuations still
come down the Green/Black wire from the sender unit and
hit the gauge’s terminal T? And wouldn’t those
fluctuations still register as such on the gauge,
totally unaffected by the capacitor?</div>
<div class="MsoNormal">Shouldn’t the capacitor be wired in
such a fashion that the fluctuations cannot bypass it?</div>
<div class="MsoNormal">Maybe I’m over complicating things
and should just try it without understanding it. Maybe I
think too much.</div>
<div class="MsoNormal">Simon</div>
</div>
</div>
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