Petronix Electronic Ignition Any Good?

Has any one used a relay to get a good 12 volts to the coil? If so where did you pick up the trigger power from? I tested the power to my coil it is just around 11.5 volts, still having a issue with a no start to car. Again this is a none Mopar electronic system, no resister block , Pertronox coil is 45111, 45,000 volt Flame thrower II unit, and matching dist. system. have power from ignition switch while cranking and in run mode of switch. But with spark plug tester in line shows only a weal yellow/orange spark, should be blue/white.