[AT] Make repairs or payments

[Cecil Bearden]

Many years ago my Dad had a friend with an old  D4 Cat that needed the 
magneto rebuilt.    I could not find a set of points for it, So I 
unsoldered the tungsten off of a set of Chevrolet points I think, and 
soldered it onto the old point arm and base. I think I used silver solder.

Cecil in OKla


On 1/30/2018 11:08 AM, Ron Cook wrote:
> True enough, Gene.  However my burnishing tool is called a platinum file.:-)
>
> Necessary tool when working on my old magnetos. I am sure those are
> still platinum contacts.  Radials are not very new and I am not out of
> WWII surplus yet.
>
> I actually had to make a point set for the distributor on one of my
> Wisconsin engines I use when I could no longer buy a replacement set.
> Really was not that hard to do but was time consuming.  It is currently
> in line for the solid state change as soon as I have time.  I had to buy
> a new distributor as a solid state version was offered back in the late
> seventies when this engine was new and that distributor is still
> available.  Just expensive.  It is currently powering my log splitter.
>
> Ron Cook, Salix, IA
>
>
> On 1/30/2018 10:27 AM, Gene Dotson wrote:
>>       The favored material for point contacts made in the 1950-1970 was
>> tungsten. Tungsten is the material used in light bulbs. Good conductivity
>> and resistant to burning and pitting. Tungsten during an inactive period
>> developes tungsten oxide, a thin hard coating and nonconductive. They should
>> be cleaned with a contact burnishing tool and not sand paper. This
>> burnishing tool leaves a very fine smooth finish and removes very little of
>> the parent contact material. Grant is right on the cheapening of the
>> materials of both the contact and spring material.
>>
>>                       Gene
>>
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at