3/9/2024 0 Comments Ditch witch parts manual 1020With a coil having 1.8 ohms if its a 12 volt tractor you need to add some series ballast (around 1.8 ohms for a 50/50 12/6 voltage divider) or the coil will overheat. Ifffff fff you pass too much more then 4 amps the coil and/or the points can overheat and fail prematurely. Of course you can still use a 6 volt coil on a 12 volt tractor IFFFFF FF you add an external series voltage dropping (12 down to 6) ballast resistor. THEREFORE on a 6 volt tractor a typical unballasted coils LV primary resistance is around 1.5 ohms as 6/1.5 = 4 amps on a 12 volt tractor a typical unballasted coils LV primary resistance is around 3 ohms as 12/3 = 4 amps Typically (NOT always) a coil distributor points ignition system limits the current the points must switch to around 4 amps. Re: J20 Ditch Witch ignition coil in reply to mudmuckgrease, 04-27-2018 14:26:57
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