This video shows one method I use to wind toroidal inductors and transformers. The real trick is often how to hold the toroid core while doing the winding of the wire. The plastic toroid fixture shown is available from http://www.qrpme.com. I also give a few details on how to strip the enamel insulation, and then test the inductor when it is complete. There are many, many useful websites that contain toroid data, including composition, type, size, materials, winding factors, calculators, and more. Here is a short list of the useful information you can find with a simple Google search:
http://toroids.info
http://www.micrometals.com/parts_index.html
http://www.qrpme.com/
http://www.electronics-tutorials.com/basics/toroidcharts_mcq.htm
http://www.catzco.com/toroids.htm
http://www.66pacific.com/calculators/toroid_calc.aspx
http://www.hamradioindia.com/kitbuild/Toroid.htm
One of my viewers suggested this great little program:
http://www.electronicecircuits.com/electronic-software/mini-ring-core-calculator-program
Apollo
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CHA EMCOMM II
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Baofeng UV-5R Two Way Radio Dual Band 144-148/420-450Mhz Walkie Talkie 1800mAh Li-ion Battery(Black)
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$35.99 (as of October 10, 2024 06:41 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)【NOAA Weather Alert Radio Keeps You Prepared Ahead】Our NOAA Weather Radio is certified by National Weather Service. Choose WB band and one of the 7 preset weather band to tune into your local weather station. When the National Weather Service issues ... read more