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My replication
Here's an image of my replication. My relay got hot and shut down or melted. But I could definitely tell when it hit the sweet spot. The sounds it made would change and amp draw dropped from 1.98 to 1.3 for a few moments. The relay didn't last long enough to tell if I went past the sweet spot or not. It is definitely sitting around 200 ohms, though the stability may be due to my slightly different components. I would highly recommend letting it run for a couple of minutes before adjusting as you can watch the amp draw drop in that time.
Build Details:
Ignition Coil Accel 8140c
(Primary Resist 1.2 Ohms Secondary 8.9 k Ohms; Turn Ratio 100:1)
B&S condenser from Ace Hardware
1uf 600volt poly cap
Relay Radio Shack 275-0005
1watt Decade resistor box
1N4007 Diode
27/100 watt CFL GE (modified per instructional vid)
540/450 12v EverStart lead acid batteries 1 run 1 charge
18ga hookup wire and test leads
Next tests will involve changing the charge battery to a dry cells, the cap to the 4.7uf and using a smaller watt bulb to see if one of those corrects the heating of the relay. Do you guys know which one would most likely cause it?
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