Two Antiparallel ignition coils

[Qwert]

http://en.wikipedia.org/wiki/Ignition_coil  >>  Construction:

"A single-spark system has one coil per spark plug. To prevent premature sparking at the start of the primary pulse, a diode or secondary spark gap is installed in the coil to block the reverse pulse that would otherwise form."

[Jeg]

What kind of coil did you find the diode in?
Norman

Norman i didn't find it anywhere. I just confused it with flyback transformers, and that was in contrast to the anti parallel connection designs for making double voltage. Through output diodes you just double the pulse frequency as Tinsel said.

Jeg