....[snip]....
testing on your own (become an expert)... Start with a yagi from the
antenna hand book - let me suggest 3 elements to start with, and if you
want more gain then go to 5 or 7 elements, i.e. always have an odd
number of elements...

WHY always an ODD number of elements?

I can understand three: reflector, driven, and director, but I don't
understand NOT four: reflector, driven, 1stDirector, 2ndDirector ???

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member & Certified Instructor for Rifle, Pistol, & Home Firearm Safety
Also Certified Instructor for the Kansas Concealed-Carry Handgun (CCH) license