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Registered Member #256
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Posts: 124
i tried googleing this, but couldnt find great answers! i heard about putting welding rods in a pvc pipe and wrapping wire around it and i may be getting a pole pig soon, so i was wondering instead of using(wasting) welding rods and knocking flux off, could i cut up tie wire and use lengths of that in place of the welding electrodes? and what size pipe should i use? length diameter? and whhat size wire and how many turns should i use?
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I am going to say that you will need the wire to be ferrous (ie steel), and that the rods should be insulated from each other (to reduce eddie currents). To figure out the dimensions requires some moderately complicated math and a constant that I have no idea how to figure out... You might try messing with the calculators on the micrometals site..
Registered Member #341
Joined: Thu Mar 23 2006, 07:41PM
Location: Northern Illinois, USA
Posts: 69
I’m not even pretending to know anything about building a ballast like this, however I won’t let a little thing like that stop me. If you want small pieces of iron or steel it seems that using welding rods that must be cleaned of their flux is kind of a waste. In the insulation section of your local home supply store they have boxes of steel wires to hold fiberglass insulation in place. There are two lengths, one for 16†centers and one for 24†centers. The diameter of the ones that I have measure .087â€. If small pieces of steel are all you need and it doesn’t need to be rod, why not use BBs? They’re cheap and small (.177â€) enough to pack to a reasonable density.
With my first coil I had a problem using a MOT as a ballast. The secondary open was too little current and the secondary shorted was too much. So I wired a variable hot plate to the secondary and was able to dial in the current that I wanted.
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welding rod pole pig ballast
