Pertronix lists the operating voltage range as 8 to 16 volts. My cranking voltage is dropping to around 8.2 volts ( I think) which is not below the threshold. I haven't used any high tech voltage readers to be sure. Just a 50 years old analog voltmeter which may or may not be off a bit. I'm going to stick a new high-tech voltmeter on later to verify.
I doubt that the Pertronix unit actually ceases to function at exactly 8 volts. But maybe? Seems silly if true. A battery loses half its power at 0 degrees F. If you want to start a gas tractor at below 0 F temps, it would not be unusual to drop to 8 volts when cranking. If Pertronix is any good, it should be capable of working in those conditions. In my case with this 1010 though - it's dropping to 8 volts at 50-60 degrees F. So if I were actually cranking at below 0 degrees F, it would probably drop even lower.
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Today's Featured Article - Converting from 6 Volt to 12 Volt - by Chris Pratt. It's a common problem for old machines especially when the weather starts to dip below 40 and the tractor isn't fired up as often. You are probably used to the 12 volt Diehard, charged with 200 amp alternator of your 3/4 ton that always is ready and always starts. It's this type of experience that brings about the many queries we get for 12-volt conversion kits. Since only a few kits are available (we sell kits for the
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