Poles are 5 mt length 21 mhz I use four bamboo poles for each element

Use the DK7ZB-match with 2x75-Ohm-coax for the 28-Ohm-Yagis and 2x50-Ohm-coax for the 12,5-Ohm-Yagis

Actual design of a single band yagi using the yagi optimizer softwar

This is a nice compact Yagi 21 Mhz beam. It has a short length boom which is made from a single piece 1.25inch square tube section

The idea of ​​weaving the upper band elements between the 15m antenna elements.

I had purchased the aluminum to build a 15- and 10-meter Yagi antenna, so it was time to build it

This is a high-gain, wideband owa optimised wideband array yagi which covers the whole of the 15m band

Yagi which covers the whole of the 15m band with an swr of less than1.1:1

This antenna has seen better days as it has been up for about 6 months

18 MHz 4 element Yagi

Getting a good antenna also for 21MHz 15 meter band, since according to the theory, a half-wave dipole for 7MHz is a 5/8 wave dipole for 21MHz

The strands of the 20 meter doublet are cut to 5.04 m, those of the 15 meter to 3.36 m

Antenna Quad a due elementi monobanda per i 15 metri

Questa è una antenna adatta per HF, in particolare per i 21 MHz

Bean tin antenna for 15 meter

Realizzare un dipolo rotativo per i 21 MHz, partendo da un dipolo commerciale per i 14 MHz

My tilting design with a winch 4 delta-quad elements for the 15m with 2 radiators supplied in phase opposition (180 °) and are spaced 1.77m apart

Gain, SWR, Front/Back and Impedance for the full 450 KHz

On the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band

Called Linear Loading , with Linear Loading, the dipole elements are effectively folded back on themselves, 2 or 3 times

E' una yagi tribanda full-size leggera, fatta di tubi in vetroresina e filort

The homebrew buddipole, the lightweight whips are now available at buddipole.com

The lengths of the elements are such that the antenna can be tuned easily