[TowerTalk] Resonance is over rated

[D.W. Fearn]

Many AM broadcast towers are not resonant -- 5/8 wavelength is 
common. A few capacitors and inductors bring the tower to 50j0 for 
50-ohm coax. No baluns are used. These antennas are fed with 
transmitters that are a lot less tolerant of reflected power than 
most ham rigs. Broadcast antennas have to be very efficient, 
especially if you are paying the power bill.

Doug K3KW