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Tom, Thanks for your "in-depth" report on the Stevens, Merctronic
and Model T Coils! There’s a lot to digest there. I remember in the
past reading information cautioning against applying 12 volt battery
voltage to outboard coils, in fear of burning them out, and believe
it was suggested to use a 9v flashlight battery on the primary
to induce spark.
I would have to look at a Model T coil again to even remember how
they’re designed, and what’s considered the primary connection, etc., and
how one would utilize a Model T coil in series to test an outboard coil.
Can’t for the life of me remember at the moment what the Model T
had for a timing device to operate the four coils as needed.
I looked briefly at my circa 1950 SUN automotive test center today,
and noted it had three components for testing coils. The current meter?,
the distributor unit with cam and points, and another meter…….
can’t remember what it said.
Am anxious to get back to the HD-15 magneto soon and see
if the problem can be determined.
Thanks for all the replies!
Prepare to be boarded!