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RE: re: converting radio to positive ground

To: "'ryoung@navcomtech.com'" <ryoung@navcomtech.com>, "'triumphs list'" <triumphs@autox.team.net>
Subject: RE: re: converting radio to positive ground
From: "Zempel, David W" <david.w.zempel@lmco.com>
Date: Wed, 03 Mar 1999 10:19:23 -0800
Randall,
Sounds much simpler than I suspected.  And apparently easy to revert back if
necessary.  Maybe I'll do it.  By the way, are there any sparks involved
when re-polarizing the generator?  I don't like sparks.  Been there, done
that.

Dave Zempel
'63 TR4 Surreytop
Sunnyvale, CA.

> ----------
> From:         Randall Young
> Reply To:     ryoung@navcomtech.com
> Sent:         Wednesday, March 3, 1999 6:17 PM
> To:   'Zempel, David W'; 'triumphs list'
> Subject:      RE: re: converting radio to positive ground
> 
> Dave :
> 
> I don't know where the article is, but the process is really easy
> (assuming 
> your TR doesn't have any electronics, like a radio <g>).  Basically you :
> 1) Disconnect the battery.
> 2) Switch the two wires at the coil (there is some debate about whether 
> this is required.)
> 3) Switch the two wires on the back of the ammeter (otherwise it will read
> 
> backwards).
> 4) Reconnect the battery, with the connections switched.
> 5) With the engine running, open the regulator cover and manually close
> the 
> cutout contacts. (If your cover doesn't come off easily, momentarily 
> connect a wire from the D terminal to the hot side of the battery.)
> 6) Replace the regulator cover.
> You're done !
> Nothing else on a early TR cares about polarity.  The business with the 
> regulator is to "polarize" the generator, which creates the residual 
> magnetism it needs to start up the right direction.  The heater and wiper 
> motors use wound fields, so will still run the right direction.
> 
> Randall
> 
> On Wednesday, March 03, 1999 8:38 AM, Zempel, David W 
> [SMTP:david.w.zempel@lmco.com] wrote:
> >
> > Wow, thanks for the input.  I'll have to check the radio for a +/-
> ground
> > switch tonight.  Yes it's an original Triumph AM only radio.  I don't 
> know
> > what year it was manufactured.  Maybe the date is stamped on it
> somewhere 
> or
> > there is a serial number on it that can be used.  Does anybody know how 
> to
> > determine any of this.  It's a good thing Randall brought out the point
> > about the antenna, I hadn't thought of that yet.  Might have missed it.
> I
> > guess I should consider converting to negative ground, I hadn't even 
> thought
> > of that.  I thought I had seen an article on the conversion process on 
> SOL.
> > I just looked, couldn't find it. Anybody know where it is?
> >
> > In all reality, I probably won't convert the electrical to negative 
> ground.
> > The car runs great as it is and all of the electrical works, at least 
> during
> > the daytime.  Since I don't drive the car much, the radio is only there 
> to
> > fill a hole in the dash, however, it would be nice if when someone
> turned 
> it
> > on I could get some static or something.
> >
> > Got to go, the boss is coming,
> >
> > Dave Zempel
> > '63 TR4 Surreytop
> > Sunnyvale, CA.
> 

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