
The basic layout of the hb9cv, notice the red zig zag wire? Thats to phase the elements.
Whats interesting about this partcular design of Yagi is it only has 2 elements but each is driven and one director while the other is the reflector! Something like that anyway but they work well and plenty of Hams say better that a 3 element, personnally i have not compared it.
A close up of the trimmer capacitor used to create a 50 ohm match which is from the remains of a radio in excess of 60 years old.