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> Large, adjustable steel inductor - theremins,antennas..
Large, adjustable steel inductor - theremins,antennas..
(1) LARGE, ADJUSTABLE STEEL INDUCTOR COIL -
Great for Theremins, Antennas, Metal Detectors, Tank Circuits, Crafts, Toys, etc.
Used but in very good condition. I purchased this in an electronics surplus store. These large springy metal inductors have practically endless uses ranging from electronics, crafts, toys, model making, science projects / science fairs, etc. Compressed, they are 2-1/2" diameter and 2-1/2" long. The conductor coil itself is about 1/8" wide and 1/32" thick. It fully expands to about 10 feet long. Inductance varies from about 240 µH (240µH, 99% compressed) to less than 40 µH (40µH, extended to about 6 feet).
I love to use these inductors in the tank circuits of homebuilt Theremin devices. A "Theremin" is an audio special effects device that dates back to about the 1920s, commonly used in those old horror and science fiction movies to produce those scary sounds. By expanding and compressing the coils, the circuit's LC tank circuit inductance is changed, thereby also changing the output frequencies, resulting in very unusual Theremin-like sounds. Similar sounds can also be produced by rubbing, flicking or moving the coils with an insulated iron bar. You can get endless hours of fun and entertainment out of it, and it has real potential of being developed into its own unique musical instrument to produces the really cool and unique sounds for some of today's music.
This inductor also serves as a pretty good antenna and metal detector coil. It has many exciting uses for the electronic hobbyist, and for science projects, science fairs, and classroom demonstrations. It can be used as a big, strong electromagnet because of the strong magnetic field it can be made to produce.
It also has crafts and shop uses. For examples, it can be used to make toys of various kinds, as well as other craft creations, such as lamps, figures, etc. And it can also be mechanically used to protect, reinforce and organize many different kinds of items such as bundles of wires and cables, long tools, tubes, pipes, rods and other shop stock.
This inductor looks a lot like a "slinky" toy. If it is a "slinky" toy it is not like any slinky that I played with as a kid, which were much larger and less springy feeling and not designed for electronic uses, and which I have never tested electronically.
NOTE: Later availability not guaranteed. LIMITED QUANTITY.
Seller listing codes: LD093, LR000-S00, LS000-R00, MM000, CC000.
