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Alan, Re: Problems with Alternator Alternativehealeys

To: <healeys@autox.team.net>
Subject: Alan, Re: Problems with Alternator Alternativehealeys
From: "Mark and Kathy" <mgtrcars@galaxyinternet.net>
Date: Mon, 16 Jan 2006 19:29:26 -0500
Alan, I believe Raymond superseded this email with another one stating that 
the alternator was not working properly after all.   Check his last email.

Any good news yet, Raymond?

Mark


----- Original Message ----- 
From: "Alan Schultz" <alan@andysnet.net>
To: "Raymond Carbone" <racarbon@optonline.net>
Cc: "Mark and Kathy" <mgtrcars@galaxyinternet.net>; "Roland Wilhelmy" 
<rwil@sbcglobal.net>; <Awgertoo@aol.com>; <healeys@autox.team.net>; 
"BJ8Healeys" <sbyers@ec.rr.com>
Sent: Monday, January 16, 2006 11:01 AM
Subject: Re: Problems with Alternator Alternativehealeys


> Raymond Carbone wrote:
>
>>The puzzle is solved.  .....the alternator's voltage regulator requires a 
>>differential, supplied by the resistance of the warning indicator light, 
>>to initiate charging.  Should the bulb burn out, charging would not be 
>>initiated and you would have no warning if you missed the fact that the 
>>light did not come on prior to engine start.  To rectify this potential 
>>problem, I installed a 15 Ohm resister parallel to the bulb to supply the 
>>alternator with the necessary resistance.
>>
>>After installing the resister, I started the engine and verified the 
>>correct functioning of the warning indication light.  Additionally, 
>>voltage measurements at the BATT terminal of the Alternator and at the 
>>battery @ 2K RPM are now 14.6V.  In short, THE ALTERNATOR IS CHARGING!!!
>>
>>Conclusion:
>>
>>It is difficult to explained what went wrong, however, I think the problem 
>>was one of product variation within spec.  If I were to guess at the 
>>issue, I would suggest that my warning bulb was exceptionally low on 
>>resistance and the alternator's regulator required a greater differential 
>>to activate.  By breaking the wires and adding additional solder for the 
>>resistor, additional resistance was entered into the circuit which tipped 
>>the scales in favor of activation.
>>
>>
> Raymond,
>
> Its great that you could solve your problem with the alternator. The list 
> serves a great purpose in resolving technical issues such as yours.
>
> I am converting to a Delco 12 SI self exciting internally regulated 
> alternator for my Jag MK VII so I find all you have gone through very 
> informative. It sounds like a good idea to install the resistor in 
> parallel with the warning light and I will do the same.
>
> I take a different view than you with the reason that the charging system 
> is now working on your car. When you installed the resistor in parallel 
> with the bulb you actually provided an additional path for current flow. 
> The combined current flow through the warning light and the parallel 
> resistor was great enough to activate the alternator field coil so it 
> could begin generating.
>
> Are you able to measure the resistance of the warning lamp with a meter? 
> It looks like I may be able to use the existing "ignition lamp" which is 
> connected to the "D" terminal of the control box but am not totally 
> convinced. I may need to rewire something.
>
> Alan Schultz
> 67HBJ8 (With Lucas Generator)
> 53 Jag MK VII (On going Frame Off Resurrection)




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