From: m35products (m35prod@optonline.net)
Date: Fri Dec 12 2003 - 06:10:48 PST
We sell 24 to 12 convertors, if you believe that it is dangerous to do it
the other way. (Which it isn't)
www.M35products.com
----- Original Message -----
From: "chance wolf" <chance_wolf@shaw.ca>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Friday, December 12, 2003 2:41 AM
Subject: Re: [MV] a simple m35 voltage question
>
> ----- Original Message -----
> From: "cliff matushin" <deuce6x6@hotmail.com>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Thursday, December 11, 2003 9:58 PM
> Subject: [MV] a simple m35 voltage question
>
>
> > I recently put a voltmeter across 1 battery in my deuce and of course
the
> > potential was about 12 volts. Then I started the engine, and the voltage
> > went up to about 14.5v. Question: why can't I run a primary wire from
> this
> > first battery to 12 volt devices and use the common ground? seems so
> easy,
> > it must be wrong. Cliff Matushin, SD.
>
> I thought that too back when I was installing cellular telephones, until I
> tapped off the one battery in series in some Hitachi excavator and blew up
> the charging system a couple of days later. The way it was explained to
me
> then is that you're unbalancing the charging system by having an extra
load
> on one battery in the series, which will then cause the other to
overcharge
> (or in the case of this Hitachi's electronic system - bake something
buried
> within some epoxy-covered module which costs $1100.00 to replace.) Either
> way, Not A Good Thing.
>
> Others have told me that a small imbalance (under 3 amps, from what I
> remember) won't hurt much on the standard military 25A and 60A systems,
but
> obviously doesn't hold true for some of the electronic ones, or a certain
> Hitachi excavator wouldn't have minded a celphone which drew about 2.8 A
> full transmit. Go figure.
>
> Others on this list have had more experience with this than I. I do know
> that in the Canadian Army, things like the M62 and M816 wreckers and other
> 24V equipment frequently had 12V beacons and lightbars installed so as to
> run off the first battery in series, and those things draw a fair bit of
> current. Probably also explains why you can smell the high-side battery
> boiling when the rotators are going too - unless it's just my pessimistic
> imagination. ;)
>
>
>
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