[TR] TR3 Voltage Regulator

[Greg Lemon]

I don't know, what is the price difference?  I have never had any luck 
adjusting the Lucas Voltage Regulator, despite having access to a proper 
manual and multi meter.  I am not sure if it is because it is difficult or 
because I have only tried to adjust when something is obviously wrong with 
the charging system, and the regulator was toast when before I even touched 
it (wishful thinking perhaps?).  However, that may very well be the case, 
because I could never get readings and adjustments to work as the testing 
procedures indicated they should (and I seem to be able to test volts, amps 
and ohms in other applications).  I will add that I am electrically 
challenged and without instructions my knowledge pretty much starts and ends 
with positive, negative, complete circuit.  I have always ended up replacing 
with good used or new when I have had regulator problems.

Greg Lemon
Current: 68 TR250 with primitive solid state non adjustable external 
regulator :)
Prior:  TR4A, Healey 100, Sprites Aplenty, MGBs, with adjustable Lucas 
regulators

--------------------------------------------------
From: <terryrs at comcast.net>
Sent: Thursday, November 5, 2015 4:38 PM
To: "list Triumph" <triumphs at autox.team.net>
Subject: [TR] TR3 Voltage Regulator

> Hi, everyone.  Installed the LED headlights, so am taking opportunity to 
> deinstall the alternator conversion.
>
> Put the rebuilt generator in, hooked up the wires to the voltage regulator 
> correctly and drove to work the next day.  Charging according to my 
> voltmeter (replaced the old ammeter with one) at 15 amps.  Right at spec.
>
> Next morning at start up, the ignition light went on and wouldn't go off. 
> Voltmeter read 12 volts because of the battery power going in, but no 
> charge from the generator.
>
> After checking all wires and grounds, tonight I took the cap off the 
> voltage regulator, shorted the break switch, and the ignition light went 
> on with the key off...what you would expect.  Started the car and the 
> voltmeter showed 12 volts that jumped to 13 at rev.  I adjusted the 
> regulator switch clockwise and bumped the charge to 15 at rev.  Seems that 
> the generator is producing power.  Test shows that at startup without 
> shorting the cutout switch, the cutout switch fails to engage.  Now I know 
> where the problem is.
>
> Easiest at this point to just replace the regulator.  Cheap enough.  But 
> question.
>
> Moss indicates regulators don't come nicely adjusted, unless you spend 
> extra to buy that feature.  Is this really necessary?
>
> Terry Smith, '59 TR3A
> New Hampshire
>
>
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