It is: http://nrgkits.shopfactory.com/workshop/half_wave_dipole_aerial.htm http://www.g0ksc.co.uk/creatingabalun.html 73 Peter -----Original Message----- From: towertalk-bounces at contesting.com [mailto:towertalk-bounces at contesting.com] On Behalf Of Norman Alexander The use of an ODD electrical quarter-wave of coaxial cable as a BAL-UN is not correct.