[AT] Project Updates '49 A, '51 A, and '47 B (STEVE ALLEN)

[Howard Pletcher]

You are correct Carl.  A 12V system takes a 12V coil with an internal
resistor or and external 1.4 ohm resistor commonly called a ballast
resistor can be used with a 6V coil.    These are available at most auto
parts stores.   This is to avoid burning the points as you say.

Howard

On Mon, May 11, 2020 at 11:14 AM <szabelski at wildblue.net> wrote:

> Cecil,
>
> My Farmall H, 4 cylinder, was converted from 6V to 12V by the PO. I use a
> coil with an internal resistor.
>
>  I remember reading some articles on doing a 6V to 12V conversion when I
> had to replace the coil at one time and needed to figure out what I needed
> for the new coil. My understanding, if I remember correctly, is that
> without the internal resistor the points will burn out a whole lot quicker.
>
>
> Carl
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.antique-tractor.com/pipermail/at-antique-tractor.com/attachments/20200511/2c0403d1/attachment.htm>