[Healeys] Polarity
Kees Oudesluijs
coudesluijs at chello.nl
Sat Mar 7 11:06:29 MST 2020
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 at chello.nl
> <mailto:coudesluijs at chello.nl>> wrote:
>
> 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, NC USA
>>>>
>>>> *From:*Healeys [mailto:healeys-bounces at 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*
>>>>
>>>>
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>>>
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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/>
>>
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