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Yes, electronic ones are polarity sensitive but easily converted. Plenty
about that on the internet.
Kees Oudesluijs
Op 7-3-2020 om 17:29 schreef i erbs:
> What about tachometers?
>
> Ira Erbs
> Portland,OR
> 1959 Austin Healey BN4
> 1967 MGB
>
> On Sat, Mar 7, 2020, 6:00 AM Kees Oudesluijs <coudesluijs@chello.nl
>
> The original pumps had a capacitor over the points which made them
> dual polarity. At a later stage SU changed the capacitor for a
> diode which made the pump polarity sensitive. If you remove the
> diode and fit a transil over the points the pump becomes dual
> polarity.
>
> The very early pumps with the single points may not have had any
> capacitor or diode fitted, which would lead to spark erosion of
> the points. These were also dual polarity.
>
> The later electronic/solid state versions are all polarity sensitive.
>
> Kees Oudesluijs
>
>
>
> Op 7-3-2020 om 14:49 schreef David P:
>>
>> SU fuel pumps are generally polarity sensitive...
>>
>>
>> On 3/7/2020 1:18 AM, Kees Oudesluijs wrote:
>>>
>>> In addition to the article:
>>>
>>> -Change polarity to the radio if fitted. Some older radio's have
>>> a polarity switch.
>>>
>>> -Check if clock is polarity sensitive. Some older Smiths/Jaeger
>>> clocks are dual polarity. Later ones are polarity sentive.
>>>
>>> -Change over the wires from the Amp gauge.
>>>
>>>
>>> Kees Oudesluijs
>>>
>>>
>>>
>>> Op 7-3-2020 om 04:48 schreef Max Byers:
>>>>
>>>> See attachment.
>>>>
>>>> Steve Byers
>>>>
>>>> HBJ8L/36666
>>>>
>>>> BJ8 Registry
>>>>
>>>> AHCA Delegate at Large
>>>>
>>>> Havelock, NCÂ USA
>>>>
>>>> *From:*Healeys [mailto:healeys-bounces@autox.team.net] *On
>>>> Behalf Of *ahbn6--- via Healeys
>>>> *Sent:* Friday, March 6, 2020 9:32 PM
>>>> *To:* Healey List
>>>> *Subject:* [Healeys] Polarity
>>>>
>>>> *Is there any step by instructions on how to change to negative
>>>> ground?*
>>>>
>>>> **
>>>>
>>>> *John Sims*
>>>>
>>>> *www.healey6.com <http://www.healey6.com/>*
>>>>
>>>> *Matawan, NJ*
>>>>
>>>>
>>>> _______________________________________________
>>>> Support Team.Nethttp://www.team.net/donate.html
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>>>>
>>>> Unsubscribe/Manage:http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl
>>>>
>>>
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>>> Unsubscribe/Manage:http://autox.team.net/mailman/options/healeys/frogeye@porterscustom.com
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>> --
>> Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My
>> World go here:WWW.PORTERBIKES.COM/ <http://WWW.PORTERBIKES.COM/>
>>
>> _______________________________________________
>> Support Team.Nethttp://www.team.net/donate.html
>> Suggested annual donation $12.75
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> _______________________________________________
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<p>Yes, electronic ones are polarity sensitive but easily converted.
Plenty about that on the internet.</p>
<p>Kees Oudesluijs<br>
</p>
<div class="moz-cite-prefix">Op 7-3-2020 om 17:29 schreef i erbs:<br>
</div>
<blockquote type="cite"
cite="mid:CABXhz89ErWxwmfy4uHYRk+9G62OC-_3tXpTYF27m03KFrKWePg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">What about tachometers? <br>
<br>
<div data-smartmail="gmail_signature">Ira Erbs<br>
Portland,OR<br>
1959 Austin Healey BN4<br>
1967 MGB</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Mar 7, 2020, 6:00 AM
Kees Oudesluijs <<a href="mailto:coudesluijs@chello.nl";
moz-do-not-send="true">coudesluijs@chello.nl</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>The original pumps had a capacitor over the points which
made them dual polarity. At a later stage SU changed the
capacitor for a diode which made the pump polarity
sensitive. If you remove the diode and fit a transil over
the points the pump becomes dual polarity.</p>
<p>The very early pumps with the single points may not have
had any capacitor or diode fitted, which would lead to
spark erosion of the points. These were also dual
polarity.<br>
</p>
<p>The later electronic/solid state versions are all
polarity sensitive.</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div>Op 7-3-2020 om 14:49 schreef David P:<br>
</div>
<blockquote type="cite">
<p>SU fuel pumps are generally polarity sensitive...</p>
<p><br>
</p>
<div>On 3/7/2020 1:18 AM, Kees Oudesluijs wrote:<br>
</div>
<blockquote type="cite">
<p>In addition to the article:</p>
<p>-Change polarity to the radio if fitted. Some older
radio's have a polarity switch.</p>
<p>-Check if clock is polarity sensitive. Some older
Smiths/Jaeger clocks are dual polarity. Later ones are
polarity sentive.</p>
<p>-Change over the wires from the Amp gauge.</p>
<p><br>
</p>
<p>Kees Oudesluijs</p>
<p><br>
</p>
<p><br>
</p>
<div>Op 7-3-2020 om 04:48 schreef Max Byers:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span style="color:#1f497d">See
attachment.</span></p>
<p class="MsoNormal"><span
style="color:#1f497d">Â </span></p>
<p class="MsoNormal"><span style="color:#1f497d">Steve
Byers</span></p>
<p class="MsoNormal"><span
style="color:#1f497d">HBJ8L/36666</span></p>
<p class="MsoNormal"><span style="color:#1f497d">BJ8
Registry</span></p>
<p class="MsoNormal"><span style="color:#1f497d">AHCA
Delegate at Large</span></p>
<p class="MsoNormal"><span style="color:#1f497d">Havelock,
NCÂ USA</span></p>
<p class="MsoNormal"><span
style="color:#1f497d">Â </span></p>
<div>
<div style="border:none;border-top:solid #b5c4df
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
Healeys [<a
href="mailto:healeys-bounces@autox.team.net";
target="_blank" rel="noreferrer"
moz-do-not-send="true">mailto:healeys-bounces@autox.team.net</a>]
<b>On Behalf Of </b>ahbn6--- via Healeys<br>
<b>Sent:</b> Friday, March 6, 2020 9:32 PM<br>
<b>To:</b> Healey List<br>
<b>Subject:</b> [Healeys] Polarity</span></p>
</div>
</div>
<p class="MsoNormal">Â </p>
<p class="MsoNormal"><b><span>Is there any step by
instructions on how to change to negative
ground?</span></b></p>
<p class="MsoNormal"><b><span>Â </span></b></p>
<p class="MsoNormal"><b><span>John Sims</span></b></p>
<p class="MsoNormal"><b><span><a
href="http://www.healey6.com/";
target="_blank" rel="noreferrer"
moz-do-not-send="true">www.healey6.com</a></span></b></p>
<p class="MsoNormal"><b><span>Matawan, NJ</span></b></p>
<p class="MsoNormal">Â </p>
</div>
<br>
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<pre cols="72">--
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World
go here: <a href="http://WWW.PORTERBIKES.COM/"; target="_blank" rel="noreferrer"
moz-do-not-send="true">WWW.PORTERBIKES.COM/</a></pre>
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