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And the 1N4004 diode provides reverse polarity protection in case someone =
(certainly not any of us!) connects the battery wrong way round.
In my line of work making stuff goof-proof pays off in the long run.=20
=20
Dave=20
=20
=20
-----Original Message-----
From: Anthony Rhodes <spamiam@comcast.net>
To: DAVID MASSEY <dave1massey@cs.com>
Cc: triumphs@autox.team.net; billbrewer59@yahoo.com
Sent: Wed, Jun 1, 2022 6:05 pm
Subject: Re: [TR] TR4/6 Voltage Stabilizer
Excellent circuit protection!
In automotive applications I don=E2=80=99t think there is TOO much protecti=
on. =C2=A0=C2=A0
So far the LM2940=E2=80=99s own protection has been sufficient. =C2=A0But t=
he car does not do very many miles each year. =C2=A0So it may simply be too=
soon to know=C2=A0
-Tony
On Jun 1, 2022, at 4:18 PM, DAVID MASSEY <dave1massey@cs.com> wrote:
=EF=BB=BF I go way beyond that.=C2=A0 First I use a 1N4004 to protect again=
st negative-going spikes (which car be as high as -80 volts), then I place =
a 15V Zener or TVS to clamp any positive-going pulses (which can be as high=
as 120V).=C2=A0 Depending on the application I also include a low value re=
sistor or polyfuse to limit the current the TVS needs to sink.=C2=A0 Then t=
here is the input filter as you pointed out.
This may be a bit of overkill but without the ability to test for optimum a=
nd considering I'm only going to build a few (or one) of these things a lit=
tle overkill is cheap insurance.
=20
Dave=20
=20
=20
-----Original Message-----
From: Anthony Rhodes <spamiam@comcast.net>
To: triumphs@autox.team.net
Cc: billbrewer59@yahoo.com
Sent: Wed, Jun 1, 2022 1:40 pm
Subject: Re: [TR] TR4/6 Voltage Stabilizer
I built my own voltage stabilizer.
At the time, Moss had one that used a diode and a transistor as a form of a=
crude shunt regulator.
I used a LM2940=E2=80=9310 automotive low dropout 10 V analog regulator.
Sense and I have seen photographs of the guts of the newer electronic regul=
ators. It appears they use a single voltage regulator with no other compone=
nts around it.
As I recall,=C2=A0 These used a through hole TO 220 device with the legs be=
nt over 90 degrees and no heat sinking.
Not ideal
All these analog regulators need proper capacitors on the input in output s=
ide of the regulator.
My regulator with the LM 2940=E2=80=9310 has been in use since probably abo=
ut 2004 with no problems in a TR4A
I can give further details, schematics, etc. to people if they are interest=
ed.
-Tony
>=20
> On Jun 1, 2022, at 2:01 PM, triumphs-request@autox.team.net wrote:
>=20
> Message: 1
> Date: Tue, 31 May 2022 19:12:36 -0700
> From: William Brewer <billbrewer59@yahoo.com>
> To: Triumph List <triumphs@autox.team.net>
> Subject: [TR] TR4/6 Voltage Stabilizer
> Message-ID: <4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com>
> Content-Type: text/plain; charset=3D"utf-8"; Format=3D"flowed"
>=20
> ???? I have a TR4 temperature gauge in my TR3. The Moss gauge voltage=20
> stabilizer only lasted a few thousand miles and the quit outputting the=
=20
> 10 volts. Anybody else having short lifespans on their voltage=20
> stabilizers? Are there better ones out there? Moss makes a big deal=20
> about "Modern electronics in a vintage style housing". Screw the vintage=
=20
> style housing, I want dependability. Is there an aftermarket one that=20
> has a long life?
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
sey@cs.com
------=_Part_6103411_2125703360.1654138242121
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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">And the 1N4004 diode provides reverse polarity prote=
ction in case someone (certainly not any of us!) connects the battery wrong=
way round.</font></div>
<div><br>
</div>
<div><font size=3D"3">In my line of work making stuff goof-proof pays off i=
n the long run. </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>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
size=3D"2">-----Original Message-----<br>
From: Anthony Rhodes <spamiam@comcast.net><br>
To: DAVID MASSEY <dave1massey@cs.com><br>
Cc: triumphs@autox.team.net; billbrewer59@yahoo.com<br>
Sent: Wed, Jun 1, 2022 6:05 pm<br>
Subject: Re: [TR] TR4/6 Voltage Stabilizer<br>
<br>
<div id=3D"yiv1995652322">
<div>Excellent circuit protection!
<div><br clear=3D"none"></div>
<div>In automotive applications I don=E2=80=99t think there is TOO much pro=
tection. </div>
<div><br clear=3D"none"></div>
<div>So far the LM2940=E2=80=99s own protection has been sufficient. =
But the car does not do very many miles each year. So it may simply b=
e too soon to know </div>
<div><br clear=3D"none"></div>
<div>-Tony</div>
<div><br clear=3D"none">
<div id=3D"yiv1995652322yqt35946" class=3D"yiv1995652322yqt4704392192">
<div dir=3D"ltr"><blockquote type=3D"cite"><br clear=3D"none">On Jun 1, 202=
2, at 4:18 PM, DAVID MASSEY <dave1massey@cs.com> wrote:<br clear=3D"n=
one"><br clear=3D"none"></blockquote></div>
<blockquote type=3D"cite">
<div dir=3D"ltr">=EF=BB=BF
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">I go way beyond that. First I use a 1N4004 to =
protect against negative-going spikes (which car be as high as -80 volts), =
then I place a 15V Zener or TVS to clamp any positive-going pulses (which c=
an be as high as 120V). Depending on the application I also include a=
low value resistor or polyfuse to limit the current the TVS needs to sink.=
Then there is the input filter as you pointed out.</font></div>
<div><br clear=3D"none">
</div>
<div><font size=3D"3">This may be a bit of overkill but without the ability=
to test for optimum and considering I'm only going to build a few (or one)=
of these things a little overkill is cheap insurance.</font><br clear=3D"n=
one">
</div>
<div> <br clear=3D"none">
</div>
<div style=3D"clear:both;">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size=3D"4">Dave <br clear=3D"none">
</font></div>
<div><font size=3D"3"><span style=3D"font-size:10pt;color:black;"><br clear=
=3D"none">
</span></font></div>
<br clear=3D"none">
</div>
</div>
<div> <br clear=3D"none">
</div>
<div> <br clear=3D"none">
</div>
<div style=3D"font-family:arial, helvetica;font-size:10pt;color:black;"><fo=
nt size=3D"2">-----Original Message-----<br clear=3D"none">
From: Anthony Rhodes <spamiam@comcast.net><br clear=3D"none">
To: triumphs@autox.team.net<br clear=3D"none">
Cc: billbrewer59@yahoo.com<br clear=3D"none">
Sent: Wed, Jun 1, 2022 1:40 pm<br clear=3D"none">
Subject: Re: [TR] TR4/6 Voltage Stabilizer<br clear=3D"none">
<br clear=3D"none">
</font>
<div dir=3D"ltr">I built my own voltage stabilizer.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">At the time, Moss had one that used a diode and a transist=
or as a form of a crude shunt regulator.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">I used a LM2940=E2=80=9310 automotive low dropout 10 V ana=
log regulator.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">Sense and I have seen photographs of the guts of the newer=
electronic regulators. It appears they use a single voltage regulator with=
no other components around it.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">As I recall, These used a through hole TO 220 device=
with the legs bent over 90 degrees and no heat sinking.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">Not ideal<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">All these analog regulators need proper capacitors on the =
input in output side of the regulator.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">My regulator with the LM 2940=E2=80=9310 has been in use s=
ince probably about 2004 with no problems in a TR4A<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">I can give further details, schematics, etc. to people if =
they are interested.<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">-Tony<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">> <br clear=3D"none">
</div>
<div dir=3D"ltr">> On Jun 1, 2022, at 2:01 PM, <a rel=3D"nofollow noopen=
er noreferrer" shape=3D"rect" ymailto=3D"mailto:triumphs-request@autox.team=
.net" target=3D"_blank" href=3D"mailto:triumphs-request@autox.team.net";>tri=
umphs-request@autox.team.net</a> wrote:<br clear=3D"none">
</div>
<div dir=3D"ltr">> <br clear=3D"none">
</div>
<div dir=3D"ltr">> Message: 1<br clear=3D"none">
</div>
<div dir=3D"ltr">> Date: Tue, 31 May 2022 19:12:36 -0700<br clear=3D"non=
e">
</div>
<div dir=3D"ltr">> From: William Brewer <<a rel=3D"nofollow noopener =
noreferrer" shape=3D"rect" ymailto=3D"mailto:billbrewer59@yahoo.com"; target=
=3D"_blank" href=3D"mailto:billbrewer59@yahoo.com";>billbrewer59@yahoo.com</=
a>><br clear=3D"none">
</div>
<div dir=3D"ltr">> To: Triumph List <<a rel=3D"nofollow noopener nore=
ferrer" shape=3D"rect" ymailto=3D"mailto:triumphs@autox.team.net"; target=3D=
"_blank" href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a=
>><br clear=3D"none">
</div>
<div dir=3D"ltr">> Subject: [TR] TR4/6 Voltage Stabilizer<br clear=3D"no=
ne">
</div>
<div dir=3D"ltr">> Message-ID: <<a rel=3D"nofollow noopener noreferre=
r" shape=3D"rect" ymailto=3D"mailto:4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@ya=
hoo.com" target=3D"_blank" href=3D"mailto:4b9c278c-ffbf-4d70-5f30-9e75ceb24=
68c@yahoo.com">4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com</a>><br cl=
ear=3D"none">
</div>
<div dir=3D"ltr">> Content-Type: text/plain; charset=3D"utf-8"; Format=
=3D"flowed"<br clear=3D"none">
</div>
<div dir=3D"ltr">> <br clear=3D"none">
</div>
<div dir=3D"ltr">> ???? I have a TR4 temperature gauge in my TR3. The Mo=
ss gauge voltage <br clear=3D"none">
</div>
<div dir=3D"ltr">> stabilizer only lasted a few thousand miles and the q=
uit outputting the <br clear=3D"none">
</div>
<div dir=3D"ltr">> 10 volts. Anybody else having short lifespans on thei=
r voltage <br clear=3D"none">
</div>
<div dir=3D"ltr">> stabilizers? Are there better ones out there? Moss ma=
kes a big deal <br clear=3D"none">
</div>
<div dir=3D"ltr">> about "Modern electronics in a vintage style housing"=
. Screw the vintage <br clear=3D"none">
</div>
<div dir=3D"ltr">> style housing, I want dependability. Is there an afte=
rmarket one that <br clear=3D"none">
</div>
<div dir=3D"ltr">> has a long life?<br clear=3D"none">
</div>
<div dir=3D"ltr"><br clear=3D"none">
</div>
<div dir=3D"ltr">** <a rel=3D"nofollow noopener noreferrer" shape=3D"rect" =
ymailto=3D"mailto:triumphs@autox.team.net"; target=3D"_blank" href=3D"mailto=
:triumphs@autox.team.net">triumphs@autox.team.net</a> **<br clear=3D"none">
</div>
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</div>
<div dir=3D"ltr">Donate: <a rel=3D"nofollow noopener noreferrer" shape=3D"r=
ect" target=3D"_blank" href=3D"http://www.team.net/donate.html";>http://www.=
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</div>
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</blockquote></div>
</div>
</div>
</div>
</font></div>
</div>
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