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<p class="MsoNormal">Now I want to build one to have on hand as a spare.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Care to share a schematic?</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cliff</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:dave1massey@cs.com">DAVID MASSEY</a><br>
<b>Sent: </b>Wednesday, June 1, 2022 2:19 PM<br>
<b>To: </b><a href="mailto:spamiam@comcast.net">spamiam@comcast.net</a>; <a href="mailto:triumphs@autox.team.net">
triumphs@autox.team.net</a><br>
<b>Cc: </b><a href="mailto:billbrewer59@yahoo.com">billbrewer59@yahoo.com</a><br>
<b>Subject: </b>Re: [TR] TR4/6 Voltage Stabilizer</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">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 can 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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Arial",sans-serif;color:black">Dave
</span><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">-----Original Message-----<br>
From: Anthony Rhodes <spamiam@comcast.net><br>
To: triumphs@autox.team.net<br>
Cc: billbrewer59@yahoo.com<br>
Sent: Wed, Jun 1, 2022 1:40 pm<br>
Subject: Re: [TR] TR4/6 Voltage Stabilizer<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I built my own voltage stabilizer.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">At the time, Moss had one that used a diode and a transistor as a form of a crude shunt regulator.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I used a LM2940–10 automotive low dropout 10 V analog regulator.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">As I recall, These used a through hole TO 220 device with the legs bent over 90 degrees and no heat sinking.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Not ideal<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">All these analog regulators need proper capacitors on the input in output side of the regulator.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">My regulator with the LM 2940–10 has been in use since probably about 2004 with no problems in a TR4A<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">I can give further details, schematics, etc. to people if they are interested.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">-Tony<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> On Jun 1, 2022, at 2:01 PM,
<a href="mailto:triumphs-request@autox.team.net">triumphs-request@autox.team.net</a> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> Message: 1<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> Date: Tue, 31 May 2022 19:12:36 -0700<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> From: William Brewer <<a href="mailto:billbrewer59@yahoo.com">billbrewer59@yahoo.com</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> To: Triumph List <<a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> Subject: [TR] TR4/6 Voltage Stabilizer<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> Message-ID: <<a href="mailto:4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com">4b9c278c-ffbf-4d70-5f30-9e75ceb2468c@yahoo.com</a>><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> Content-Type: text/plain; charset="utf-8"; Format="flowed"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> ???? I have a TR4 temperature gauge in my TR3. The Moss gauge voltage
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> stabilizer only lasted a few thousand miles and the quit outputting the
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> 10 volts. Anybody else having short lifespans on their voltage
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> stabilizers? Are there better ones out there? Moss makes a big deal
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> about "Modern electronics in a vintage style housing". Screw the vintage
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> style housing, I want dependability. Is there an aftermarket one that
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">> has a long life?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">**
<a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Donate:
<a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Archive:
<a href="http://www.team.net/pipermail/triumphs" target="_blank">http://www.team.net/pipermail/triumphs
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Unsubscribe/Manage:
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