Waste Spark Coils

[Jack E. James]

Hi guys,
Thought I would add that Harley Davidson coils starting from the late eighty's using transistor modules also offer an alternative and a simple (4 pin) Delco HEI chip module (WELLS DR100) will fire virtually all transistor (low ratio) type coils. Plus the HEI has a low
level input that can be triggered from TTL using a resistive divider string. Be sure to mount module on finned heatsink.
JJ

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