Alan, I believe Raymond superseded this email with another one stating that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)
|