[AT] Pos Gnd/ Neg grnd
Edchainsaw at aol.com
Edchainsaw at aol.com
Fri Jan 17 13:23:08 PST 2014
from what I was told in engineering school: the old theory was that
electrons flowed one way out of the battery and then it was discovered they
went the other and some companies designs and engineering was already built
the one way (and it worked) so they didn't change it till there was new
engineering done --- hence if you do your research you will find that a JD
24v (which is a 'bastardised" system from GM-) - is actually 12v neg
ground for the gauges and then when alternators were put to use there was new
engineering so all went to (-) grnd.
that's what I was told in 1980 at my engineering school in my Electrical
Engineering class (they didn't really spend time on DC current we were
into POWER.. lol )
In a message dated 1/17/2014 12:06:13 P.M. Eastern Standard Time,
at-request at lists.antique-tractor.com writes:
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Today's Topics:
1. Tractor batteries (Greg Hass)
2. Re: Tractor batteries (Dean VP)
3. Re: Tractor batteries (k7jdj at aol.com)
4. Re: Tractor batteries (charlie hill)
5. Re: Tractor batteries (Bo Hinch)
6. Re: Tractor batteries (Stephen Offiler)
----------------------------------------------------------------------
Message: 1
Date: Fri, 17 Jan 2014 00:06:43 -0500
From: Greg Hass <ghass at m3isp.com>
Subject: [AT] Tractor batteries
To: at at lists.antique-tractor.com
Message-ID: <52D8BA63.2030407 at m3isp.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Was looking at some old tractor stuff online and was reminded of
something I have know for years but have never, at least in my failing
memory, seen a plausible explanation as to why most 6 volt tractors have
positive grounds whereas 12 volt tractors have negative ground. At
first I thought it could be because 6 volts had generators, however, our
first 12 volt tractors had generators and later models had alternators
so that doesn't seem to be the reason. Any and all answers would be great.
Greg Hass
------------------------------
Message: 2
Date: Thu, 16 Jan 2014 22:24:03 -0700
From: "Dean VP" <deanvp at att.net>
Subject: Re: [AT] Tractor batteries
To: "'Antique tractor email discussion group'"
<at at lists.antique-tractor.com>
Message-ID: <000001cf1344$569960f0$03cc22d0$@att.net>
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All 6V and 12V John Deere's of the two Cylinder variety had positive ground
set ups.
Dean VP
Apache Junction, AZ
Atheism is a non-prophet organization.
-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Greg Hass
Sent: Thursday, January 16, 2014 10:07 PM
To: at at lists.antique-tractor.com
Subject: [AT] Tractor batteries
Was looking at some old tractor stuff online and was reminded of something
I
have know for years but have never, at least in my failing memory, seen a
plausible explanation as to why most 6 volt tractors have positive grounds
whereas 12 volt tractors have negative ground. At first I thought it could
be because 6 volts had generators, however, our first 12 volt tractors had
generators and later models had alternators so that doesn't seem to be the
reason. Any and all answers would be great.
Greg Hass
_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at
------------------------------
Message: 3
Date: Fri, 17 Jan 2014 01:23:17 -0500 (EST)
From: k7jdj at aol.com
Subject: Re: [AT] Tractor batteries
To: at at lists.antique-tractor.com
Message-ID: <8D0E163BE894680-1DC-5D27 at webmail-vd012.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"
According to this link, it was manufacture choice until it was discovered
that using positive ground shortened spark plug life.
Let the flames begin!
http://wiki.answers.com/Q/What_is_the_reason_for_a_positive_ground_system
Gary
Renton, WA
-----Original Message-----
From: Dean VP <deanvp at att.net>
To: 'Antique tractor email discussion group' <at at lists.antique-tractor.com>
Sent: Thu, Jan 16, 2014 9:27 pm
Subject: Re: [AT] Tractor batteries
All 6V and 12V John Deere's of the two Cylinder variety had positive ground
set ups.
Dean VP
Apache Junction, AZ
Atheism is a non-prophet organization.
-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Greg Hass
Sent: Thursday, January 16, 2014 10:07 PM
To: at at lists.antique-tractor.com
Subject: [AT] Tractor batteries
Was looking at some old tractor stuff online and was reminded of something
I
have know for years but have never, at least in my failing memory, seen a
plausible explanation as to why most 6 volt tractors have positive grounds
whereas 12 volt tractors have negative ground. At first I thought it could
be because 6 volts had generators, however, our first 12 volt tractors had
generators and later models had alternators so that doesn't seem to be the
reason. Any and all answers would be great.
Greg Hass
_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at
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------------------------------
Message: 4
Date: Fri, 17 Jan 2014 07:30:58 -0500
From: "charlie hill" <charliehill at embarqmail.com>
Subject: Re: [AT] Tractor batteries
To: "Antique tractor email discussion group"
<at at lists.antique-tractor.com>
Message-ID: <9D3C52A2F75545999ED9DD95B9A8316F at OwnerPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Greg, I don't remember ever seeing an explanation for that either.
Enquiring minds want to know! grins
Charlie
-----Original Message-----
From: Greg Hass
Sent: Friday, January 17, 2014 12:06 AM
To: at at lists.antique-tractor.com
Subject: [AT] Tractor batteries
Was looking at some old tractor stuff online and was reminded of
something I have know for years but have never, at least in my failing
memory, seen a plausible explanation as to why most 6 volt tractors have
positive grounds whereas 12 volt tractors have negative ground. At
first I thought it could be because 6 volts had generators, however, our
first 12 volt tractors had generators and later models had alternators
so that doesn't seem to be the reason. Any and all answers would be great.
Greg Hass
_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at
------------------------------
Message: 5
Date: Fri, 17 Jan 2014 07:43:37 -0600
From: Bo Hinch <bohinch at gmail.com>
Subject: Re: [AT] Tractor batteries
To: Antique tractor email discussion group
<at at lists.antique-tractor.com>
Message-ID:
<CAPFiRD1m9SM2yJuWT+Q6st=_pAVpKBQMbKd5R2i6SkaUuE=gAg at mail.gmail.com>
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Look at below link and see that everyones thoughts about this discussion
will probably be correct ..
http://www.mtfca.com/discus/messages/80257/107576.html?1254186126
Bo Hinch in S/W Louisiana
On Fri, Jan 17, 2014 at 6:30 AM, charlie hill
<charliehill at embarqmail.com>wrote:
> Greg, I don't remember ever seeing an explanation for that either.
> Enquiring minds want to know! grins
>
> Charlie
>
> -----Original Message-----
> From: Greg Hass
> Sent: Friday, January 17, 2014 12:06 AM
> To: at at lists.antique-tractor.com
> Subject: [AT] Tractor batteries
>
> Was looking at some old tractor stuff online and was reminded of
> something I have know for years but have never, at least in my failing
> memory, seen a plausible explanation as to why most 6 volt tractors have
> positive grounds whereas 12 volt tractors have negative ground. At
> first I thought it could be because 6 volts had generators, however, our
> first 12 volt tractors had generators and later models had alternators
> so that doesn't seem to be the reason. Any and all answers would be
great.
> Greg Hass
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>
------------------------------
Message: 6
Date: Fri, 17 Jan 2014 09:03:00 -0500
From: Stephen Offiler <soffiler at gmail.com>
Subject: Re: [AT] Tractor batteries
To: Antique tractor email discussion group
<at at lists.antique-tractor.com>
Message-ID:
<CAP6upcg2uRX9M2B=xrb0usNtuoXqbH-K8R1mNJXVCbRmZki-tg at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
I recall hearing that positive ground was related somehow to a corrosion
issue. Something to do with minimizing an electro-chemical corrosion
mechanism, if positive ground was used. Google found this writeup, which
sounds pretty plausible to me:
http://www.daviescraig.com.au/POSITIVE_AND_NEGATIVE_EARTH_CARS-news.aspx
SO
On Fri, Jan 17, 2014 at 12:06 AM, Greg Hass <ghass at m3isp.com> wrote:
> Was looking at some old tractor stuff online and was reminded of
> something I have know for years but have never, at least in my failing
> memory, seen a plausible explanation as to why most 6 volt tractors have
> positive grounds whereas 12 volt tractors have negative ground. At
> first I thought it could be because 6 volts had generators, however, our
> first 12 volt tractors had generators and later models had alternators
> so that doesn't seem to be the reason. Any and all answers would be
great.
> Greg Hass
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>
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