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Voltage stabilizer alternator upgrade problem

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Got_All_4

Got_All_4

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Well I heard so many great stories about upgrading to a higher output alternator when my Tr250 alt was bad I purchased a Bosch re-man and wow what bright lights I have! I don't recall the amperage but I'm sure it's around 45.
You know how one good thing leads to another problem and this seems no different. I have been through 2 voltage stabilizers since the car has been running. (Only in the driveway) and they have only lasted 1 and 2 days. In an e-mail to Ed Esslinger who produces the electronic voltage stabilizers mentioned that the voltage from the alt may be to high causing the malfunctions. I have heard through many sources that the new stabilizers being produced are of poor quality and don't last. I'm sure if the voltage is too high it would burn out any unit no matter how good it is.
I took a reading at the battery and at idle the voltmeter reads 14.3 volts. Measuring at the green wire at the stabilizer it dropped to 14.1 volts. I do have Ed's electronic stabilizer and before I blow another $24, do I need to some how drop the voltage to 12 to 13 volts at the green wire before it feeds the new stabilizer? Looking for opinions, options and solutions. Thanks Larry
 
Isn't Ed the guy who is/was selling his stabilizers on eBay? I believe his circuit is based on zener diodes. You could go the other route and use an u7810 chip (10v solid state voltage stabilizer) available from www.mouser.com and use that instead. They run about $0.70/each so you can go through a lot of them before your wallet hurts.

There should be no reason at all for you to drop the operating 14.3 volts to 12-13 volts prior to the stabilizer. The job of the stabilzer... is to drop volts. What you're describing would be a pre-stabilizer (regulator) for the stabilizer.

It could be that you are getting some massive voltage spikes on the output from the alternator as its control circuit cuts in and out. I'm talking about spikes that would happen to fast to catch with a volt meter. To protect against these, an acquaintance of mine bought devices called Transient-Voltage-Suppressors (TVS) and wired them in parallel to his Pertronix ignition (which he'd blown out a couple of times). To the best of my knowledge, the TVS solved his problems with voltage spikes killing his ignition system, it may help protect Ed's stabilizers as well. I'll see if I have the model of TVS at home and post it here. The TVS looks like a BIG power diode (in a black case) and these were off-the-shelf items at www.digikey.com

Eureka ! See:
https://www3.telus.net/DonsMiniSite/MiniTek_PertronixTVS.html
This is my friend's web site. He gives the model of the TVS there.
 
Thanks Doug
My thinking on a pre-regulator was that the original style stabilizer would not be able to handle the 14.3 volts. That's why the stabilizers are burning up. I didn't think the original alt put out much over 13 volts. I like your idea of voltage spikes and could be the problem. I'll check into it. Yes, Ed is the guy that was & is back selling them on e-bay.
 
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