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Output of H Generator

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'52 Farmall H

10-08-2005 11:56:00

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OK, now I have the model number. What I"m really after is the power output (watts & amps) of the generator. I did a web search with the model # for that information, but I couldn"t find anything.
Does anyone know this information? In the past, I"ve heard the generator puts put 10 amps, 60 watts and 6 volts. Is this right?
Thanks!

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Bob M

10-08-2005 19:19:33

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 11:56:00

FWIW I ran measurements on several Delco 6 volt generators on H's, M's and my Minnie Mo U. With the adjustable 3rd brushes set in the "maximum output" position, the field terminals grounded (to get full output...) the generators cold and the armatures turning at full RPM, measured outputs ranged from 13 to 16 amps at 7 volts. Outputs dropped off by several amps as the generators warmed up.

That equates to around 100 watts max cold. However 70 - 75 watts is probably a more realistic continuous "working" output.

Compared to modern 12 volt alternators (a typical 100 amp alternator is good for about 1,500 watts) the old 6 volt generators are not much!

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'52 Farmall H

10-09-2005 17:17:14

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Re: Output of H Generator in reply to Bob M, 10-08-2005 19:19:33

Thanks Bob! This is very good information. I was wondering if you were going to write somthing about this subject!
Thanks.

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John T

10-08-2005 16:29:42

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 11:56:00

I dont have any Delco specs in front of me, but many of those older 6 volt units were around 10 amps max output. The later models and ones used on 12 volt systems went up to the 20 amp range. As posted watts = volts x amps and 6 x 10 still = 60 in my calculator. Those older tractos ran about 4 amps of coil current which only left around 6 amps for a couple lights, so it was about all they could do to keep the battery charged at night.

What is it youre trying to accomplish?? Wanna stay at 6 volts or convert to 12 or what and why for????? ? Maybe we can help ya

Good luck n God Bless

John T, retired electrical engineer in Indiana

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'52 Farmall H

10-08-2005 19:11:32

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Re: Output of H Generator in reply to John T, 10-08-2005 16:29:42

Thanks all for the info.
After reading many posts over the years hashing out the old topic of 6v VS. 12v and all that goes with it, I've decided to keep the system mostly original.
I will keep it a 6v positive ground, with a generator. Once I get the tractor running, I don't envision much night use. To be perfectly honest, I do see much work for it at all. I won't need real bright lights.
What I will be changing, just for the fun of it, is the light setup itself. I'm going to convert the light system to LEDs. LEDs could very well be brighter then the original 1133 bulbs. I've been doing a lot of research into this, and I think it will work. At the very least, the light output would be the same, but I'd never have to change a bulb.
This is why I need to know how much juice the generator puts out, so I can calculate how many bulbs the system can handle. I'm really grateful for the info of the coil draw, I never thought of that! (I am not electrical minded.)
Thank you all!

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John T

10-08-2005 20:48:18

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 19:11:32

I like things original myself, but when I use 6 volts I try n use 00 Gauge Battery n Starter n Ground cables and a heavy duty rated big battery all of which helps cold weather starting fer sure. Remember the Gen will put out max if the Field is dead grounded versus a resistive ground such as some of the light switches used for the low charge (lights off) position.

John T

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'52 Farmall H

10-09-2005 13:03:49

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Re: Output of H Generator in reply to John T, 10-08-2005 20:48:18

Hi John, I"m not quite sure what you are saying about the resistor. I understand what you are saying, but what is the application? I forgot to mention that I am going to put 2/00 ga. cable on the H, that is my second deviation from the original system (LEDs are the 1st.).
Thanks.

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PAULIH300

10-08-2005 15:19:19

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 11:56:00

Nothing can beat the output of a modern alternator.You'll get around 60 12V amps from a basic one wire GM style internal regulated alternator,sorta makes the original oversize generator seem puny in comparison.And having bright lights at idle speed,and a fully charged battery every time you need to start it are just some of the side benefits of "modern" technology.

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RustyFarmall

10-08-2005 13:47:58

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 11:56:00

Install a 12 volt regulator, and connect to a 12 volt battery, and that 6 volt generator will keep the battery charged. Not recommended though, the generator will overheat and cook itself in short order.

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Unreserved dick

10-08-2005 18:21:17

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Re: Output of H Generator in reply to RustyFarmall, 10-08-2005 13:47:58

Afraid I have to disagree with Rusty on this one. The old IH generators are capable of producing 12 volts with little (if any) reduction in life expectancy. Mine's in a 12 volt system and is still going strong after years of operation.

We haven't had the discussion for a while on this forum, but a generator is basically a current-producing device which doesn't really care too much what its output voltage is, as long as it doesn't exceed its maximum. Resistive heating in the armature follows the square of the output current times the armature resistance, so unless the voltage regulator calls for more current at 12 volts than at 6, the armature heating remains the same.

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John T

10-08-2005 20:30:09

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Re: Output of H Generator in reply to Unreserved dick, 10-08-2005 18:21:17

I have to agree, Ive used 6 volt generators on 12 volt systems and only changed the Voltage Regulator AND NONE EVER WENT BAD. A Generator dont necessarily know what its voltage is supposed to be, it increases as its turned faster or theres more field current. However, if you double the voltage you can cut the current in half and still impart the same energy.

John T

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Howard Kirby

10-17-2005 12:33:27

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Re: Output of H Generator in reply to John T, 10-08-2005 20:30:09

I would be interested in John T's complete trouble shooting procedure. I have a generator with no output and would like to track the problem. I have not done anything as yet.
Thank You
Howard Kirby

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Red Dave

10-08-2005 12:13:11

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Re: Output of H Generator in reply to '52 Farmall H, 10-08-2005 11:56:00

It'll probably put out a little more than 10 amps at full output, but 6 volts at 10 amps does equal 60 watts.

Volts X Amps = Watts

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