The item in photo is a coil of 20-gauge copper wire (with enamel or varnish insulation), is 12 inches in diameter, weighs close to 5 pounds and has a resistance of about 25 ohms. The coil is wrapped with electrical tape. Appears to have been homemade. Found it in a box of electrical odds & ends which I rescued, to keep some potentially good (?) stuff from going to the landfill.
A couple of thoughts on the possible intended use -
- Sense coil for a home-brew metal detector.
- Degauss coil for use with CRT monitors, TVs., etc..
Bob M.
I would have gone with a degaussing coil ! It looks a bit like the ones we had 30 odd years ago. Having said that when I was at school I recall some apparatus with a similar coil used for demonstrating the principles of magnetism.
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Best Regards:
Baron.
It does look a good bit like commercially available degaussing coils. With CRT monitors being well on the way toward the same end as the dinosaurs, it's probably not worth even experimenting to see if it works for that task. Also, if my measurement of 25 ohms is right, it would pull about 4.5 amps when hooked up to 115 vac outlet. Guess that would make me a little nervous. Possibly a very brief activation is all it takes though. Anyway, thanks much. Maybe the best use for this item is taking it to the metal recycler!
-- For the current: #20 AWG weighs about 3lb. per 1000', so 5lb. would be:
Wow, another example of what an amazing network of expertise one can tap into via the net, specifically, through Google groups! Thanks much, John.
Those old degaussing coils have found new life as tool demagnetizers. If it doesn't explode the first time you plug it in, hang on to it.
Tom
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