General ignition question?

[CJ]

Here is a good explanation on a ballast resistor circuit. -->> The ballast resistor coil

 

[BurntMoney]

It is a MSD blaster coil Napa part number BK 7357250
Here is the link to the web page:

NAPA AUTO PARTS

 

[1986cj7]

Most ballast resistor coil systems run aprox. 7.5 volts. The resistor is usually only needed for a point type ignition system. What is the part # of the coil you have?

Not necessarily true. I believe you are mistaking a diode with the ballast resistor. The resistor drops the voltage to the coil (allows the coil to work in the specified voltage - a 6v coil will eventually fail with 12v) and a diode placed between the charging circuit and the coil acts like a gate and only allows current to flow in one direction.

I also think that the diode is what is used in altenators to change ac current into dc current by asolateing the currnet to one side the frequence. Where ac can go from top and bottom of the frequence line the diode prevents the current from making the full flow from the top of the frequence line to the bottom. Hear is a great site to explain it better Pirate4x4.Com - The largest off roading and 4x4 website in the world. there is also a great write up on wiring that should also be read Pirate4x4.Com - The largest off roading and 4x4 website in the world. this will help alot, very good reading!