Chuck Balyeat This email address is being protected from spambots. You need JavaScript enabled to view it. of Texas USA submitted the following cheap alternative to the ubiquitous Buzzcoil. Thanks Chuck.

Here's one sure way to rig up a quick and easy spark coil to run old angine ignitions , keep dogs out of your trash or test the strength of one's continence. The best part is that it is made of ordinary junk car fodder - namely a coil and condensor (preferably one with internal resistor) and a NO/NC Bosch relay found in clusters under late model car hoods .! (If you like, you can add a 0.5 to 1 mfd capacitor in series with a 500 to 1000 ohm resistor across the breaking points of the relay (30 & 87a) and they will last much longer ).