Need to wind a toroid with a center-tap. Have seen this somewhere, but
can't remember where and can't find it. Anyone know how to easily wind a
tap into a toroid? Am thinking maybe put a loop at that point with a twist
in the wire to keep it from slipping back onto the toroid and loosening the
other windings. Anybody have any ideas on this?
=======================
A bi-filar winding A-a and B-b . Connect a to B (that's the centre)
Number of turns is half the total required. A and b are obviously the
end connections.
So a toroid requiring 10 turns with a centre needs 5 bi-filar turns.

Frank KN6WH / GM0CSZ