HF radios often use toroidal transformers and winding them is a rite of passage for many RF hackers. [David Casler, KE0OG] received a question about how they work and answered it in a recent video ...

Alpha-Core introduces the Model HBC-2 turns counter, a precision instrument that accurately counts the number of turns of magnet wire in toroidal and other types of core transformers. The HBC-2 also ...