John Coppens ON6JC/LW3HAZ describes how to make a Quadrifilar Helicoidal antenna
http://jcoppens.com/ant/qfh/index.en.php
Taming the QFH Antenna by Bill Sykes G2HCG and Bob Cobey G0HPO http://www.askrlc.co.uk/
John Coppens ON6JC/LW3HAZ describes how to make a Quadrifilar Helicoidal antenna
http://jcoppens.com/ant/qfh/index.en.php
Taming the QFH Antenna by Bill Sykes G2HCG and Bob Cobey G0HPO http://www.askrlc.co.uk/