Re: [TR] TR4/6 Voltage Stabilizer

[DAVID MASSEY <dave1massey@cs.com>]

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 Not to be pedantic, but the original is a digital regulator.=C2=A0 It is c=
omposed of the bimetal spring and a heater=C2=A0 As the heater heats up the=
 bimetal spring will open the contacts and switch off the heater (and the v=
oltage to the gauges).=C2=A0 As the spring cools off the spring will switch=
 the power back on and so the cycle continues giving an average voltage of =
10 volts.
The electronic versions are actually analog.=C2=A0 They use a classic integ=
rated circuit voltage regulator that is a tried and proven part.=C2=A0 If t=
hey are prone to failure it is because the designer did not make proper pre=
cautions against the very unfriendly environment a car's electric power sys=
tem is.=C2=A0 This is especially true in older cars.=C2=A0 When loads are s=
witched on and off there are voltage spikes, both positive and negative, th=
at will far exceed the ratings on typical solid state components.=C2=A0 Mot=
ors are especially prone to doing this.=C2=A0 Heater fans, wipers, starter =
motors.
I have designed many custom electronic devices for my cars and I have never=
 had one fail.=C2=A0 But I don't cheap out on the protection devices.=C2=A0=
 The Crane ignition module is another example of an electronic device that =
stands up well to the nastiness doled out by the car's electrical system.

All that said, I still run an OE voltage stabilizer in my TR6.=C2=A0 Never =
found a need to change it.
=20
Dave=20


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tion1 {}-->I went through three digital stabilizers in my TR4 before I reve=
rted to an original analog one and haven=E2=80=99t had a problem since.

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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">Not to be pedantic, but the original is a digital re=
gulator.&nbsp; It is composed of the bimetal spring and a heater&nbsp; As t=
he heater heats up the bimetal spring will open the contacts and switch off=
 the heater (and the voltage to the gauges).&nbsp; As the spring cools off =
the spring will switch the power back on and so the cycle continues giving =
an <span style=3D"text-decoration: underline;">average</span> voltage of 10=
 volts.</font></div>

<div><br>
</div>

<div><font size=3D"3">The electronic versions are actually analog.&nbsp; Th=
ey use a classic integrated circuit voltage regulator that is a tried and p=
roven part.&nbsp; If they are prone to failure it is because the designer d=
id not make proper precautions against the very unfriendly environment a ca=
r's electric power system is.&nbsp; This is especially true in older cars.&=
nbsp; When loads are switched on and off there are voltage spikes, both pos=
itive and negative, that will far exceed the ratings on typical solid state=
 components.&nbsp; Motors are especially prone to doing this.&nbsp; Heater =
fans, wipers, starter motors.</font></div>

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

<div><font size=3D"3">I have designed many custom electronic devices for my=
 cars and I have never had one fail.&nbsp; But I don't cheap out on the pro=
tection devices.&nbsp; The Crane ignition module is another example of an e=
lectronic device that stands up well to the nastiness doled out by the car'=
s electrical system.<br>
</font></div>

<div><br>
</div>

<div><font size=3D"3">All that said, I still run an OE voltage stabilizer i=
n my TR6.&nbsp; Never found a need to change it.</font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size=3D"4">Dave <br>
</font></div>

<div><font size=3D"3"><span style=3D"font-size: 10pt; color: black;"><br>
</span></font></div>
<br>
</div>
</div>

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</div>

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<div class=3D"yiv2589538093MsoNormal"><span style=3D"font-family:New serif;=
color:#1F497D;">I went through three digital stabilizers in my TR4 before I=
 reverted to an original analog one and haven=E2=80=99t had a problem since=
.</span></div>
<br>
</div>
</div>
</div>
</font></div>
</div>

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