Someone may jump in here with one to sell you.

You could also contact some of the regular vendors in the WTN

Right now I see one for sale at the following website: [url= http://www.2040parts.com/52-53-54-hudson-all-models-packard-series-200-300-400-voltage-regulator-i298522/ ][/url]

Ebay is a good source for NOS regulators, as well. You'll find both the original AutoLite and aftermarket regulators for your car.

I can't answer your question about interchangeability.

Thanks for your input; I'll take a look around the WTN site and Ebay

Another thought about the indicator light - I'm not an expert on wiring but I believe the way that light works is as follows. When the generator is not charging, the lamp gets power on one contact from the ignition switch. The other side acts like a ground (zero voltage) and the light goes on because current flows. When the generator is charging the light has power on both contacts and therefore the light goes out (same voltage on both sides - no current flow).

The bottom line for this idea is that if the wire from the voltage regulator to the indicator light is broken and shorted out to ground then the light will stay on all the time that the ignition switch is on.

Try checking the wire from the voltage regulator to the indicator light.

Ed

Thank You! I've verified the circuit is healthy. At this point, the voltage regulator is suspect. Troubleshooting continues.

Allen, have you confirmed that the generator is OK? Here's a test: Connect a voltmeter to the "ARM" terminal on the generator. Then use a jumper wire to ground the "Fld" terminal at the generator. Start it up and at idle you'll see only 1 volt or so. Slowly increase the rpm and the voltage should rise to the 6-8 volt range. Be careful as you do this ... once the voltage starts to come up, it does so pretty quickly. And don't increase rpm beyond what it takes to get 6-8 volts. If you see that the voltage does come up to normal range, the generator is probably OK and the problem is indeed in the regulator.