You can eliminate the resistor for the ignition system by using a 12 volt coil but you will still need some way of keeping the #1 terminal of the alternator from back feeding the ignition circuit and preventing the engine from shutting down when the switch is turned off.
This can be done with a diode which stops any current from coming back out of the alternator to the ignition circuit, a resistor which drops the voltage of the back feed too low for the engine to stay running, a light bulb which can serve as a charge indicator and also lowers the voltage, an ignition switch with separate accessory and ignition feed terminals, or a separate source to energize the #1 terminal. A separate source could be a switch that you manually activate to provide the power or it could be done automatically by using a switch closed by engine oil pressure.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
... [Read Article]
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