Bought the H!

Sounds like a deal, when you can get a standard 3-wire alternator for half that (or less), and all it takes to make THAT work is an "idiot light", or a diode that costs 2 bucks,or less!

Get a standard 10SI Delco alternator, instead of the (goofy)one-wire unit.

Likely, it will be cheaper, will start to charge at idle, and is less likely to slowly drain the battery during periods of non-use, and is still really easy to wire up. If you don't want to use an "idiot light" as in BobM's diagrams, do can use a simple, easy to conceal out of the way diode, as shown here:

• BobM's diagrams

I use the 2 wire ac/delco alt with 2 resistors. one is for the coil and one for the alt. puts about 4 volts to the points and thats plenty.

On topic discussion - my Dad's first tractor was an H, and my first tractor was an H. I, of course, haven't even finished fixing mine up yet, but it is very useable. And I recently bought my Dad's H back! They are both 42 models, mine is early and his is late. His came on rear steel from the factory and now has cutoffs. I will be picking it up and taking it back to his farm in November when I'm on vacation from work. I'm hoping it will be a happy occasion for him and the tractor.

Good luck with your H, can't wait to see pics!