This antenna, or at least the one i made, not only covers 10-20m but tunes quite well to 40 and 80

Deploying a centre fed open loop half-wave dipole in a square shape lowers the impedance to around 8-12ohms.steve hunt g3txq, took a different approach and his design uses a 1:4 step up balun transformer to compensate for the low impedance

I put the antenna online via a two way switch to allow comparison to the old faithful ½ size G5RV, and the difference was noticeable

I built a portable version of a cobweb antenna, it is based on a design by stephen webb g3tpw

Balun di corrente su toroide Amidon T200 avvolgere 8 spire sul toroide da un lato ed altre 8 spire dall'altro lato

After the success of my first cobweb antenna I decided to build a rigid version for my home QTH

Cobweb-10m-12m-15m-17-20m was the design from g3tpw. and work very well, the only limitation was the small bandwith, after a year i was very happy with this kind of antenna and decided to make a definitive cobweb, this time i built the sp3l variant with an inproved bandwith

Building a cobwebb antenna, is an hf antenna for the 14 - 18 - 21 - 24 - 28mhz bands, the antenna is practically a fan dipole five dipoles fed in parallel

It comprises 5 parallel dipoles bent into a square shape and mounted on a support structure made of fibreglass pole

The wires above are 12-14 AWG basically speaker cables which are cut to 1/2 wavelength for each band the area of the band you are interested

These are my SWR readings so far: 28.782→ 1:2 - 24.248→ 1.2 - 20.633→ 1:2 - 17.664→ 1:2 - 14.079→ 1:1

The main advantages of the CobWebb over other 5 band 14 to 28 MHz antennas are that it is small, lightweig

Compact array of dipoles, bent into a square, almost omni-directional and with unity gain

Each side is around 2.7m 8ft 10in the elements are located on the spreaders by aluminium clout nails

Diy cobweb antenna build a rigid version

20m, 17m, 15m, 12m, 10m operation, at 4 meters from the ground for test

Cobweb Antena is the best omnidirectional antenna for 6m, 10m, 12m, 15m, 17m, and 20m HF Bands