[Farmall] International A died (and I am baffled)

[Jim Becker]

Larry,
>From anything I have seen, there are 3 varieties of ignition coils, each 
should be labeled accordingly.
   6 volt - never uses a ballast resistor, wire from igniton switch straight 
to coil, another wire coil to distibutor.
   12 volt no ballast resistor required, wired same as 6 volt.
   12 volt ballast resistor required, wire from ignition switch to coil, 
another wire resistor to coil, third wire coil to distibutor.

Ballast resistors come in a variety of styles.  Any with only 2 electrical 
terminals will work fine.  For tractor use, I see no particular advantage to 
using a coil that requires an extenal ballast.

Jim Becker        jim.becker at verizon.net

----- Original Message ----- 
From: <ebony51 at frontiernet.net>
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
Sent: Wednesday, July 01, 2009 8:51 AM
Subject: Re: [Farmall] International A died (and I am baffled)

> I assume for a 6 volt coil, one needs a ballast resister before it.

> For a 12 volt coil, does it need a ballast resister after it so 12 volts 
> to not go to the points and burn them up?