Anyone who has ever wound a toroidal coil by hand can tell you that it’s not exactly a fun job. Even with the kinds of coils used in chokes and transformers for ham radio, which generally have ...

[eclipsed78], built an automatic toroid winder (Internet Archive). The drum splits in order to load the toroid. Then wire is wound on the drum, much like any other coil would be wound. The drum ...

No longer able to lean on a weak loonie, companies like Plitron found the guts to invest in new equipment in 2010 You can save this article by registering for free here. Or sign-in if you have an ...