[Fot] Fw: Polarity Question

[Jack Wheeler]

 Thanks to all who responded to my question.  I was corrected on the fact that Triumph switched to negative ground when the TR-4A was implemented (1965).  The TR-4 was still positive ground.  But, the Roadster Factory lists the same part number for the TR-4 Generator (205939/AL) and the TR-4A, so my logic is still correct.  Not that it applies to me, but I wonder if there is any difference when using this generator on a TR-4 verses a TR-4A?
Thanks again.
Jack

   ----- Forwarded Message ----- From: fubog1 <fubog1 at aol.com>To: fot at autox.team.net <fot at autox.team.net>; Jack Wheeler <jwheeler1947 at yahoo.com>Sent: Saturday, November 18, 2023 at 10:06:20 AM ESTSubject: Re: [Fot] Polarity Question
  Yes momentarily "flash"/put power to the genny field (small) terminal.
Glen Efinger

    On Saturday, November 18, 2023 at 08:34:01 AM EST, Jack Wheeler via Fot <fot at autox.team.net> wrote:  
 
 
I just bought a new generator for my TR-3A.  The Roadster Factory lists the same part number for the TR-3 generator and the TR-4 generator.  However, the TR-3 was originally positive ground, while the TR-4 was negative ground. Are these new generators set for positive or negative ground, or are they designed to handle either?  I changed the polarity of my car when I restored it years ago, so it is now negative ground.
My question is, do I need to polarize this new generator?  If it is set for a negative ground, I'm afraid I might switch it to positive ground if I do that "flick" thing.  The instructions Albert sent me said to run a wire from the battery terminal which feeds the solenoid (positive in my case), then flick it against the field coil terminal of the generator.  OK, if I need to do this, which is the field coil terminal, the one on the side of the generator, or the large one on the end?
I don't want to do anything that will burn out my new generator or voltage regulator.  Thanks for any help you can give me.
Jack Wheeler
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