Semi-Transistor ignition system DIY

Considerable contact points surface wear in VW 1302 Super Beetle obliged me to think over about some modification on ignition system, though I make it a rule to keep it's pure original condition. Seeking in my junk box, found out I NPN Transistor C1137 , a piece of diode and 120 ohm cement resistor, so no consideration interrupts me to try as an experiment. Not a few minutes were necessary to realize me an amazing improvement motor response compared with original lazy condition, after some barrack wiring of the junk parts and the system application into 11AD engine room, as a temporal setting on the cooling fan case surface. About the necessity of a heat sink for power Tr, heating amount was not not so apparent as imagined, so adhering a small piece of aluminum plate must play a good part of the purpose.
Writing the truth, 2 pieces of C5352 were prepared already for Semi-Transistor Ignition system DIY, initial barrack wired system would be used for the time being as an experimental trial.
The improvement in this trial setting must be brought by the semiconductor character of spike noise regulation, so fine signals are oscillated in the primary coil resulting strong sparking on every distributed plug.
Both idling and high speed rotation performances are excellent that has not been experienced before.(Written yesterday)

DIY semi-transistor ignition system for air-cooled VW 1302 Super Beetle was remade finally as shown in the photo, 2 pieces of C5352 PNP Tr. were applied and regular heatsink also. Care must be taken of the use of this Trip. because the Emitter terminal is connected with holding plate inside, so some isolating method should be considered. Upside down setting could carried out the purpose. All the AD motor performance was improved eye-openingly and carburetor mixture and idle valve setting were required including ignition timing. Negative opinions are observed here and there in Web site, but actual application of the additional circuitry shows incredible differences at all. Probably, this changing of phenomena must have brought by the semiconductor's effect of fine cutting on spike noises after it's on and off actions.(Heute)