{"title":"Coils","description":"","products":[{"product_id":"coil-form","title":"Coil Form","description":"\u003cp\u003eCoil form made of high impact polystyrene 3.5\" diameter by 3\" long. This is not drilled and does not include other hardware. For a drilled coil form please see \u003ca href=\"\/products\/coil-form-drilled-with-hardware\"\u003eCoil Form Drilled with Hardware\u003c\/a\u003e.\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983956042098,"sku":"CF","price":3.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/coil-form.jpg?v=1782564620"},{"product_id":"coil-form-drilled-with-hardware","title":"Coil Form Drilled with Hardware","description":"\u003cp\u003eCoil form made of high impact polystyrene 3.5\" diameter by 3\" long. Predrilled as supplied with \u003ca href=\"\/products\/solderless-crystal-radio-kit-5\/\"\u003eCrystal Radio Kit 5\u003c\/a\u003e and \u003ca href=\"\/products\/crystal-radio-kit-6\/\"\u003eCrystal Radio Kit 6\u003c\/a\u003e. For AM radio, when used with the \u003ca href=\"\/products\/variable-capacitor-266pf\"\u003eplastic variable capacitor dual section 266pf\u003c\/a\u003e, use 40 turns of 22 AWG magnet wire approximately 40 feet. Includes a location to center tap ground for inductive coupling of longer antennas. You may want to experiment with how many turns on the small coil side work best. I typically use 5 to 10 turns. Other wire can be used with the coil form. The \u003ca href=\"\/page\/lc-inductance-calculator\"\u003eLC Inductance Calculator\u003c\/a\u003e can be used to help determine the amount of wire and space required. On the large side of the coil there is approximately 1.25 inches and on the short side of the coil there is approximately 0.25 inches.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/winding-coil.pdf\"\u003eClick here for instructions for winding the coil.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eIncludes:\u003cbr\u003e\n1 - 3.5\" diameter x 3\" coil form (high impact polystyrene) predrilled\u003cbr\u003e\n3 - \u003ca href=\"\/products\/brass-4-40-screw-1-2\"\u003eBrass #4 1\/2\" Panhead Screws\u003c\/a\u003e\u003cbr\u003e\n9 - \u003ca href=\"\/products\/brass-4-40-nut\"\u003eBrass #4 Nuts\u003c\/a\u003e\u003cbr\u003e\n6 - \u003ca href=\"\/products\/brass-4-washer\"\u003eBrass #4 Washers\u003c\/a\u003e\u003cbr\u003e\n\u003c\/p\u003e\u003cp\u003eThis item does not include wire. Please see our selection of \u003ca href=\"\/product-category\/wire\/magnet\/\"\u003emagnet wire\u003c\/a\u003e and \u003ca href=\"\/product-category\/wire\/litz\/46-awg\/\"\u003elitz wire\u003c\/a\u003e.\u003c\/p\u003e\n ","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983956337010,"sku":"CFDH","price":6.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/coil-form-drilled.jpg?v=1782564622"},{"product_id":"180uh-loopstick-antenna-coil","title":"180uh Loopstick Antenna Coil","description":"\u003cp\u003e\n\tThese are high quality ferrite antenna coils. The ferrite rods are 125 ui permeability. The ferrite rods are 10mm x 60mm.\n\u003c\/p\u003e\n\u003cp\u003e\n\tFor AM Radio match the 180uh coil with the \u003ca href=\"\/products\/variable-capacitor-266pf\"\u003eDual Section 266pf Variable Capacitor\u003c\/a\u003e.\n\tUse both sections of the 266pf variable capacitor for a total of 532pf.\n\tYou can optionally include one or more of the trimmers to lower the frequency range slightly if needed.\n\u003c\/p\u003e\n\u003cp\u003e\n\t\u003cimg src='https:\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/varcap266-lsa180-wiring.jpg\"' alt=\"Variable Capacitor 266pf 180uh Coil Wiring\"\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n\tThese are known as Ferrite Rod Loopstick Antenna Coils used in AM radios and Crystal ( Xtal ) Radio Sets. These are also known as a Antenna Coils, Ferrite Antenna Coils, Loopstick or Loop Stick , Magnetic Antenna Coil, Ferrite Rod Antenna Coils, AM ferrite Antenna Coils, Ferrite Rod Coils. Crystal Radio Antenna Coils. Crystal Radio Coils.\n\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983957778802,"sku":"LSA180","price":4.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/ferrite-loopstick-antenna-coil-180-1.jpg?v=1782564621"},{"product_id":"240uh-loopstick-antenna-coil","title":"240uh Loopstick Antenna Coil","description":"\u003cp\u003e\n\t240uh loopstick antenna coil. These are high quality ferrite antenna coils.\n\tThe ferrite rods are 125 ui permeability. The ferrite rods are 10mm x 70mm.\n\u003c\/p\u003e\n\u003cp\u003e\n\tFor AM Radio match the 240uh coil with the \u003ca href=\"\/products\/variable-capacitor-335pf-20pf\"\u003eVariable Capacitor Dual 335pf and 20pf\u003c\/a\u003e.\n\tUse one 335pf section plus one of the 20pf trimmers for a total of 355pf.\n\tYou can optionally include the other trimmer to lower the frequency range slightly if needed.\n\u003c\/p\u003e\n\u003cp\u003e\n\t\u003cimg src='https:\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/varcap335-lsa240-wiring.jpg\"' alt=\"Variable Capacitor 335pf 240uh Coil Wiring\"\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n\tThese are known as Ferrite Rod Loopstick Antenna Coils used in AM radios and Crystal ( Xtal ) Radio Sets.\n\tThese are also known as a Antenna Coils, Ferrite Antenna Coils, Loopstick or Loop Stick , Magnetic Antenna Coil, Ferrite Rod Antenna Coils, AM ferrite Antenna Coils, Ferrite Rod Coils. Crystal Radio Antenna Coils. Crystal Radio Coils.\n\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983957811570,"sku":"LSA240","price":4.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/ferrite-loopstick-antenna-coil-240-1.jpg?v=1782564624"},{"product_id":"680uh-loopstick-antenna-coil-tap-470uh","title":"680uh Loopstick Antenna Coil with tap at 470uh","description":"\u003cp\u003e\n\tThis coil has a single tap slightly off center at 470uh.\n\u003c\/p\u003e\n\u003cp\u003e\n\tThe ferrite rod is 5mm X 12mm X 55mm.\n\u003c\/p\u003e\n\u003cp\u003e\n\tThese are known as Ferrite Rod Loopstick Antenna Coils used in AM radios and Crystal ( Xtal ) Radio Sets.\n\tThese are also known as a Antenna Coils, Ferrite Antenna Coils, Loopstick or Loop Stick,\n\tMagnetic Antenna Coil, Ferrite Rod Antenna Coils, AM ferrite Antenna Coils, Ferrite Rod Coils.\n\tCrystal Radio Antenna Coils. Crystal Radio Coils.\n\u003c\/p\u003e\n\u003cp\u003e\n\tI sell these Crystal Radio Coils in two different values 680uh, 788uh.\n\tThe 680uh comes in two forms\n\tone is on a round ferrite rod 10mm in diameter and 60mm long with no taps.\n\tThe other two are on flat bars 5mm X 12mm X 55mm long.\n\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983957844338,"sku":"LSA680-470","price":4.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/ferrite-loopstick-antenna-coil-680-470-1.jpg?v=1782564651"},{"product_id":"680uh-loopstick-antenna-coil","title":"680uh Loopstick Antenna Coil Round Rod","description":"\u003cp\u003e\n\tThe 680uh round rod loopstick antenna coil measures 680uh when the coil is flush with the end of the ferrite rod.\n\tThe coil will measure approximately 1,000uh when the coil is centered on the rod.\n\tThis coil has no taps.\n\u003c\/p\u003e\n\u003cp\u003e\n\tThe ferrite rod is round 10mm x 60mm.\n\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983957877106,"sku":"LSA680RR","price":4.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/ferrite-loopstick-antenna-coil-680-1.jpg?v=1782564645"},{"product_id":"788uh-loopstick-antenna-coil","title":"788uh Loopstick Antenna Coil","description":"\u003cp\u003e\n\tThe coil has taps at the center and about 680uh 10 turns from the end.\n\u003c\/p\u003e\n\u003cp\u003e\n\tThe ferrite rod is 5mm X 12mm X 55mm.\n\u003c\/p\u003e\n","brand":"Atomic 29","offers":[{"title":"Default Title","offer_id":61983957909874,"sku":"LSA788","price":4.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1894\/2578\/files\/ferrite-loopstick-antenna-coil-788-1.jpg?v=1782564647"}],"url":"https:\/\/atomic-29.com\/collections\/coils.oembed","provider":"Atomic 29","version":"1.0","type":"link"}