Voltage Regulator for 4A084 alternator

[Duane Scarborough]

Some of us plan to use the 4A084's original permanent magnet alternator for charging thier battery. The output of the alternator is about 40 volts AC at 3600 RPM. The original regulator-rectifier turns that into approx. 28.5 volts DC, for charging 24 volt batteries.

That's no good if you plan to have a 12 volt electrical system.

Fortunately, there's an easy, simple solution. Key West Controls makes a nice solid state voltage regulator/rectifier that works very well with the 4A084's alternator. Together they'll provide a 12 amp, 13.8 volt DC charging system, which is what we need for a 12 volt electrical system.

You can find it at Aircraft Spruce for $59.95. Thier part number is PS030.

Here's a link:

http://www.aircraftspruce.com/catalog/e ... pwrsup.php

Other places also carry it, but they all seem to have the same price.

My airplane friend turned me on to this, and says they work great. It's a simple 4 wire hookup. Ideally, it should probably be mounted to a fairly large piece of framework, to provide a good heat sink.

Duane

[qahqn8]

Hi Duane:

Know this an old post. I was wondering if anyone who used this product could tell me if they liked it. Im kicking ideas around for the charging system. I plan on running at least one light bar, navs/anchor, and comms. Thanks for any information.

[aewrigh]

I just installed the onan voltage regulator. I will get some numbers after I fire it up

[qahqn8]

Thanks Aewrigh. Just want to make sure I dont run out of light!

[bgmcl60]

this is what i use. i needed to make my charging system work so i could hook my tach up to it. wouldn't work with mag hook up.
https://www.ebay.com/i/252945038062?chn=ps&dispItem=1