If you have working device with 50-60Hz and 4diodes and one big cap (high voltage), YOU CAN put ignition into its case to get energy in +- line. A good thin is an old 12v accu and car ignition coil. Should work better with some amplituners from 70's. Go ahead, let the sparks move the device:) you can make captret-paulos version too (Paulos is a shortform of Power Amplifier Under License Overunity System). You will get protection in U.S.A.