[Healeys] Polarity

[gradea1 at charter.net]

Good one , Bob! However, my tach cable is different on each end. I
think stock Positive ground works well. I floated my Smiths clock and
it has been that way for years. Hank

	-----------------------------------------From: "Bob Spidell" 
To: healeys at autox.team.net
Cc: 
Sent: Saturday March 7 2020 9:30:01AM
Subject: Re: [Healeys] Polarity

  The article on healey.org documents tells how to convert an
electronic tach. For the mechanical ones, you just have to reverse the
cable.

 bs

 On 3/7/2020 8:29 AM, i erbs wrote:
    What about tachometers? 

 Ira Erbs
 Portland,OR
 1959 Austin Healey BN4
 1967 MGB  
  On Sat, Mar 7, 2020, 6:00 AM Kees Oudesluijs  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 [2]] 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 [3] 

	MATAWAN, NJ 

 

Links:
------
[1] mailto:coudesluijs at chello.nl
[2] mailto:healeys-bounces at autox.team.net
[3] http://mail2.spectrum.net/HTTP://WWW.HEALEY6.COM/

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