Re: [TR] Troubleshooting TR3A fuel gauge

[DAVID MASSEY <dave1massey@cs.com>]

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 No, the TR3 gauges are quite different from the TR4-6 style gauges.=C2=A0 =
The TR3 gauge has a compensating coil to stabilize the reading over varying=
 supply voltages.=C2=A0 Since the TR3 has a mechanical temperature gauge th=
e fuel gauge is the only gauge that needs this feature.=C2=A0 The TR4 intro=
duced the electrical temperature gauge and the voltage stabilizer style was=
 adopted, probably for cost purposes since there are now two gauges that re=
quire voltage compensation.
I've calibrated (or attempted to) my TR3 fuel gauge and it is quite the fid=
dly process.=C2=A0 Probably another reason for the change.

An interesting note: the TR7 and TR8 reverted to the self-compensating gaug=
es which include the compensating coils.
=20
Dave=20

=20
=20
-----Original Message-----
From: Dave Connitt <dconnitt@fuse.net>
To: Wbeech@flash.net <wbeech@flash.net>
Cc: triumphs <triumphs@autox.team.net>; Dave MacKay <dave@mdmackay.ca>
Sent: Thu, May 30, 2019 2:22 am
Subject: Re: [TR] Troubleshooting TR3A fuel gauge

Hi Dave,Doesn=E2=80=99t the TR3 have a voltage regulator for the fuel and t=
emperature gauges like the TR4 and TR4A?=C2=A0Dave Connitt=C2=A0



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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">No, the TR3 gauges are quite different from the TR4-=
6 style gauges.&nbsp; The TR3 gauge has a compensating coil to stabilize th=
e reading over varying supply voltages.&nbsp; Since the TR3 has a mechanica=
l temperature gauge the fuel gauge is the only gauge that needs this featur=
e.&nbsp; The TR4 introduced the electrical temperature gauge and the voltag=
e stabilizer style was adopted, probably for cost purposes since there are =
now two gauges that require voltage compensation.</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">I've calibrated (or attempted to) my TR3 fuel gauge a=
nd it is quite the fiddly process.&nbsp; Probably another reason for the ch=
ange.<br>
</font></div>

<div><font size=3D"3"><br>
</font></div>

<div><font size=3D"3">An interesting note: the TR7 and TR8 reverted to the =
self-compensating gauges which include the compensating coils.</font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both"><font size=3D"4">Dave </font><br>
<br>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Dave Connitt &lt;dconnitt@fuse.net&gt;<br>
To: Wbeech@flash.net &lt;wbeech@flash.net&gt;<br>
Cc: triumphs &lt;triumphs@autox.team.net&gt;; Dave MacKay &lt;dave@mdmackay=
.ca&gt;<br>
Sent: Thu, May 30, 2019 2:22 am<br>
Subject: Re: [TR] Troubleshooting TR3A fuel gauge<br>
<br>

<div id=3D"yiv8048791274">
<div>Hi Dave,
<div>Doesn=E2=80=99t the TR3 have a voltage regulator for the fuel and temp=
erature gauges like the TR4 and TR4A?&nbsp;</div>

<div>Dave Connitt&nbsp;<br clear=3D"none"><br>
</div>
</div>
</div>
<br>
</div>
</div>

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