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Good one , Bob! However, my tach cable is different on each end. I=0Athi=
nk stock Positive ground works well. I floated my Smiths clock and=0Ait=
has been that way for years. Hank=0A=0A=09-----------------------------=
------------From: "Bob Spidell" =0ATo: healeys@autox.team.net=0ACc: =0AS=
ent: Saturday March 7 2020 9:30:01AM=0ASubject: Re: [Healeys] Polarity=
=0A=0A The article on healey.org documents tells how to convert an=0Ael=
ectronic tach. For the mechanical ones, you just have to reverse the=0Ac=
able.=0A=0A bs=0A=0A On 3/7/2020 8:29 AM, i erbs wrote:=0A What about=
tachometers? =0A=0A Ira Erbs=0A Portland,OR=0A 1959 Austin Healey BN4=
=0A 1967 MGB =0A On Sat, Mar 7, 2020, 6:00 AM Kees Oudesluijs wrote:=
=0A=0A=09The original pumps had a capacitor over the points which made t=
hem=0Adual polarity. At a later stage SU changed the capacitor for a dio=
de=0Awhich made the pump polarity sensitive. If you remove the diode and=
=0Afit a transil over the points the pump becomes dual polarity. =0A=0A=
=09The very early pumps with the single points may not have had any=0Aca=
pacitor or diode fitted, which would lead to spark erosion of the=0Apoin=
ts. These were also dual polarity.=0A=0A=09The later electronic/solid st=
ate versions are all polarity sensitive.=0A=0A=0A=09Kees Oudesluijs =0A=
=0A Op 7-3-2020 om 14:49 schreef David P:=0A=0A=09SU fuel pumps are gen=
erally polarity sensitive... =0A=0A On 3/7/2020 1:18 AM, Kees Oudesluij=
s wrote:=0A=0A=09In addition to the article: =0A=0A=09-Change polarity t=
o the radio if fitted. Some older radio's have a=0Apolarity switch. =0A=
=0A=09-Check if clock is polarity sensitive. Some older Smiths/Jaeger=0A=
clocks are dual polarity. Later ones are polarity sentive. =0A=0A=09-Cha=
nge over the wires from the Amp gauge. =0A=0A=09Kees Oudesluijs =0A=0A =
Op 7-3-2020 om 04:48 schreef Max Byers:=0A=0A=09See attachment. =0A=0A=
=09Steve Byers =0A=0A=09HBJ8L/36666 =0A=0A=09BJ8 Registry =0A=0A=09AHCA=
Delegate at Large =0A=0A=09Havelock, NC USA =0A=0A=09FROM: Healeys [mai=
lto:healeys-bounces@autox.team.net [2]] ON BEHALF=0AOF ahbn6--- via Heal=
eys=0A SENT: Friday, March 6, 2020 9:32 PM=0A TO: Healey List=0A SUBJECT=
: [Healeys] Polarity =0A=0A=09IS THERE ANY STEP BY INSTRUCTIONS ON HOW=
TO CHANGE TO NEGATIVE=0AGROUND? =0A=0A=09JOHN SIMS =0A=0A=09WWW.HEALEY6=
.COM [3] =0A=0A=09MATAWAN, NJ =0A=0A =0A=0ALinks:=0A------=0A[1] mailto:=
coudesluijs@chello.nl=0A[2] mailto:healeys-bounces@autox.team.net=0A[3]=
http://mail2.spectrum.net/HTTP://WWW.HEALEY6.COM/=0A
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<html><body>Good one , Bob! However, my tach cable is different on each=
end. I think stock Positive ground works well. I floated my Smith=
s clock and it has been that way for years. Hank<br><br><div class=3D"re=
ply-new-signature"></div><p>-----------------------------------------</p=
>From: "Bob Spidell" <bspidell@comcast.net><br>To: healeys@autox.team.ne=
t<br>Cc: <br>Sent: Saturday March 7 2020 9:30:01AM<br>Subject: Re: [Heal=
eys] Polarity<br><br>=0A <meta http-equiv=3D"Content-Type" content=3D=
"text/html; charset=3DUTF-8">=0A =0A The article on healey.org docum=
ents tells how to convert an=0A electronic tach. For the mechan=
ical ones, you just have to reverse=0A the cable.<br>=0A <br>=0A =
bs<br>=0A <br>=0A <br>=0A <br>=0A <div class=3D"moz-cite-=
prefix">On 3/7/2020 8:29 AM, i erbs wrote:<br>=0A </div>=0A <block=
quote type=3D"cite" cite=3D"mid:CABXhz89ErWxwmfy4uHYRk+9G62OC-_3tXpTYF27=
m03KFrKWePg@mail.gmail.com">=0A <meta http-equiv=3D"content-type" c=
ontent=3D"text/html; charset=3DUTF-8">=0A <div dir=3D"auto">What ab=
out tachometers? <br>=0A <br>=0A <div data-smartmail=
=3D"gmail_signature">Ira Erbs<br>=0A Portland,OR<br>=0A =
1959 Austin Healey BN4<br>=0A 1967 MGB</div>=0A </div>=
=0A <br>=0A <div class=3D"gmail_quote">=0A <div dir=3D"=
ltr" class=3D"gmail_attr">On Sat, Mar 7, 2020, 6:00 AM=0A Kees=
Oudesluijs <<a href=3D"mailto:coudesluijs@chello.nl"; moz-do-not-send=
=3D"true">coudesluijs@chello.nl</a>> wrote:<br>=0A </div>=0A =
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=0A =
.8ex;border-left:1px #ccc solid;padding-left:1ex">=0A <div>=
=0A <p>The original pumps had a capacitor over the points whi=
ch=0A made them dual polarity. At a later stage SU changed=
the=0A capacitor for a diode which made the pump polarity=
=0A sensitive. If you remove the diode and fit a transil ov=
er=0A the points the pump becomes dual polarity.</p>=0A =
<p>The very early pumps with the single points may not have=0A=
had any capacitor or diode fitted, which would lead to=0A=
spark erosion of the points. These were also dual=0A =
polarity.<br>=0A </p>=0A <p>The later ele=
ctronic/solid state versions are all=0A polarity sensitive.=
</p>=0A <p>Kees Oudesluijs</p>=0A <p><br>=0A =
</p>=0A <p><br>=0A </p>=0A <div>=
Op 7-3-2020 om 14:49 schreef David P:<br>=0A </div>=0A =
<blockquote type=3D"cite">=0A <p>SU fuel pumps are ge=
nerally polarity sensitive...</p>=0A <p><br>=0A =
</p>=0A <div>On 3/7/2020 1:18 AM, Kees Oudesluijs wrote:=
<br>=0A </div>=0A <blockquote type=3D"cite">=
=0A <p>In addition to the article:</p>=0A =
<p>-Change polarity to the radio if fitted. Some older=0A =
radio's have a polarity switch.</p>=0A <p>-Check if=
clock is polarity sensitive. Some older=0A Smiths/Jaeg=
er clocks are dual polarity. Later ones are=0A polarity=
sentive.</p>=0A <p>-Change over the wires from the Amp g=
auge.</p>=0A <p><br>=0A </p>=0A =
<p>Kees Oudesluijs</p>=0A <p><br>=0A =
</p>=0A <p><br>=0A </p>=0A =
<div>Op 7-3-2020 om 04:48 schreef Max Byers:<br>=0A </=
div>=0A <blockquote type=3D"cite">=0A <d=
iv>=0A <p class=3D"MsoNormal"><span style=3D"color:#1=
f497d">See=0A attachment.</span></p>=0A =
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"> </=
span></p>=0A <p class=3D"MsoNormal"><span style=3D"co=
lor:#1f497d">Steve=0A Byers</span></p>=0A =
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">HBJ8L/=
36666</span></p>=0A <p class=3D"MsoNormal"><span styl=
e=3D"color:#1f497d">BJ8=0A Registry</span></p>=0A=
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"=
>AHCA=0A Delegate at Large</span></p>=0A =
<p class=3D"MsoNormal"><span style=3D"color:#1f497d">Haveloc=
k,=0A NC USA</span></p>=0A =
<p class=3D"MsoNormal"><span style=3D"color:#1f497d"> </span></=
p>=0A <div>=0A <div style=3D"bor=
der:none;border-top:solid #b5c4df=0A 1.0pt;paddin=
g:3.0pt 0in 0in 0in">=0A <p class=3D"MsoNormal"><=
b><span style=3D"font-size:10.0pt;font-family:"Tahoma","s=
ans-serif"">From:</span></b><span style=3D"font-size:10.0pt;font-fa=
mily:"Tahoma","sans-serif"">=0A =
Healeys [<a href=3D"mailto:healeys-bounces@autox.team.net"; targe=
t=3D"_blank" rel=3D"noreferrer" moz-do-not-send=3D"true">mailto:healeys-=
bounces@autox.team.net</a>]=0A <b>On Behalf O=
f </b>ahbn6--- via Healeys<br>=0A <b>Sent:</b=
> Friday, March 6, 2020 9:32 PM<br>=0A <b>To:=
</b> Healey List<br>=0A <b>Subject:</b> [Heal=
eys] Polarity</span></p>=0A </div>=0A =
</div>=0A <p class=3D"MsoNormal"> </p>=0A=
<p class=3D"MsoNormal"><b><span>Is there any step by=
=0A instructions on how to change to negative=
=0A ground?</span></b></p>=0A =
<p class=3D"MsoNormal"><b><span> </span></b></p>=0A =
<p class=3D"MsoNormal"><b><span>John Sims</span></b></p>=0A =
<p class=3D"MsoNormal"><b><span><a href=3D"http://www.he=
aley6.com/" target=3D"_blank" rel=3D"noreferrer" moz-do-not-send=3D"true=
">www.healey6.com</a></span></b></p>=0A <p class=3D"M=
soNormal"><b><span>Matawan, NJ</span></b></p>=0A <p c=
lass=3D"MsoNormal"> </p>=0A </div>=0A =
<br>=0A </blockquote>=0A </blockquote>=
=0A </blockquote>=0A </div>=0A </blockquote>=
=0A </div>=0A </blockquote>=0A <br>=0A </bspidell@comcast.ne=
t></body></html>
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