Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

TURNSTILE ANTENNA 179lated members for the radio-frequency signal, they are actuallygrounded to the pole to afford lightning protection. Because of thegrounding feature, it is a simple matter to include sleet-melting unitsin each radiator.Two concentric feed lines connect the several units, replacing theopen wires formerly used. By means of standard concentric line, thesetwo feed lines are fed in push-pull from a single concentric feed linewhich runs back to the transmitter. This feed line is terminated toeliminate standing waves.Principle of Turnstile AntennaThe fundamental objectives of the turnstile antenna are twofold,