"Richard" wrote in message
...

All yagis shall have 4mm (or 3/16") diameter parasitic elements.

I think this is reasonable. It will keep the antenna lightweight. Why have
bigger if you don't have to.

The DE for all yagis shall be 8mm (or 5/16").

Possibly this could be 3/8" because this size might generally more easily
available.

The DE for all yagis shall be a regular hertz dipole.

Why have a folded dipole if you don't have to.

How are you going to mount DE? Are there any commercially availble dipole
centers that take 5/16" or 3/8" tube? Will you have to homebrew the dipole
center peice?

(In UK I can obtain commercial dipole centers that hold 1/2". I've not
sourced any others that take 5/16" or 3/8").