I dont like using a diode when wiring a 3 wire alt to an older machines ignition supply circuit. A diode will full field the alternator, adding 2-3 amps load to what may already be a marginal power supply to the coil. The added 2-3 amp load on that ignition circuit can cause voltage drop and poor spark for starting. Substitute a charge warning light for the diode. A charge light only adds less than 1/4 amp load on the ignition circuit, yet will excite your alternator at idle. The charge light is also a great indicator to tell you that the alternators field circuit is functioning and if the alternator is charging. Also a warning to remind you that you left the ignition switch turned on with the engine stopped. A #1815 lamp and two wire base works good for most applications and can be hidden or exposed.
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Today's Featured Article - A Question for Dads This recent topic from the Tractor Talk discussion board is being highlighted because it is an awesome display of the caliber of individuals that have made this site their own. The young person asking questions received positive feedback and advice from total strangers who "told it like it is" with the care many reserve for their own kids. The advice is timeless... so although it isn't necessarily antique tractor related, it will be prominently displayed in our archives to honor those who have the courage to ask and those who have the courage to respond in an honest, positive manner.
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