[Farmall] H Generator problems

[szabelsk at gdls.com]

Ron,

You can put a resistor in line with the output of the generator, measure 
the voltage across the resistor (voltage drop across the resistor), divide 
by the resistance, and you will have the current flowing through the 
resistor. This is the output of the generator for that resistor in series 
with the rest of the tractor's electrical loading. Depending on how much 
the rest of the tractor's electrical loading is, you should see something 
between 0 and 7 volts on a 6 volt system. This is basic Ohm's Law.

If you change the tractor loading (high beams, low beams, etc), you will 
see the voltage across the resistor change since the total tractor load 
will have changed, which will cause the current being drawn to change, and 
therefore the voltage drop across the resistor will change. You have to 
have an idea of the maximum current output of the generator to select a 
resistor of the correct wattage that won't burn up due to the current 
flowing through it.  Also pick a value that is easy to use for division, 
like 10, 100, 1000, ....

Carl Szabelski



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