[TrevorG3VLF]

A religious transmitting station in the tropics had trouble with corona eating the ends of a yagi aerial so the cubical quad was born without high voltage ends. I have a book somewhere detailing this.

I made a two element 20m quad with bamboo speaders and flexible wire loops. I used this to talk to my sister weely, Shropshire to Halifax Nova Scotia. Heathkit DX100 AM transmitter.

There has been a lot of papers saying how superb the quads are, much of the claims seem to me to wishful thinking.

If the aerial is wanted for portable use, I would go for a two element yagi which could be folded easily. Indoor aerials are compromised by adjacent conductive equipment.

Indoors (Derbyshire) I use a vertical folded dipole made from 300 ohm ribbon held up with a drawing pin and a 4 element yagi pointing at Sutton Coldfield.