Hey, I llke to tinker as much as the next guy, but.....the CD circuits sold by myself and TKG use ONE sensor, there is NO dwell time, the circuit trigggers every time the magnet passes the sensor, and will run for hours on a 4.8 volt 500 MA battery..No calculating dwell, just a DG6852 sensor from Digi-Key and a magnet.,Set the timing at 28 BTDC and fly....The small coils sold for use with these circuits were made to be used with points from a 3 or 6 volt battery, not a CD ignition that puts around 300 volts into the coil....
TKG and I both had "blue light" specials, he sold 3 and I sold 2...These circuits, when used with a proper coil, will outlast the engine and won't burn out any coil, although the Modelectric coils with their weaker insulation don't last as long...We put about 300 volts into the coil....
I guess $50.00 is too high a price....How much do 3 coils cost ?