G4CQM FREE BEAM ANTENNA DESIGNS FOR YOU!
DO IT YOURSELF
...Welcome to G4CQM FREE BEAM ANTENNA DESIGNS FOR YOU web page!
Whilst preparing 'The Pump House' my NEW RADIO QTH I decided that a small beam was needed to begin with. So I did a re-scale of my 6M-0.6WL 5 element yagi using YO7 PRO and AO PRO. Here are the results and I'm pleased to say that its working exactly as predicted by YO7, out of the box as they say! I used old junk to build this beam including a non-metallic boom (acrylic tube) and some old Jbeam element to boom castings. The elements are ALL 3/8 inch (9.5mm) diameter. Don't forget to double the element lengths shown in the YO7 screen shot below! Finally, this is a 50-Ohm Direct Feed yagi so there is NO MATCHING required. Even a simple split dipole will work and suitable ferrite slipped over the coax at the feed point. However, I'm using one of my 'Coaxial Dipoles' instead, much better!!
Have fun and work DX
73's de G4CQM
Email: g4cqm@live.co.uk
