ETS-Lindgren 3142C Biconilog Antenna (Archived) - Manual (Page 15)

Contact with any metal or non-metallic structure can capacitively load the
antenna, which may cause unrepeatable results. Therefore, make sure that no
part of the dipole elements or bow-ties is in contact with the tripod or tower,
particularly in vertically-polarized tests. Where possible, run the feed cable
straight one meter or more back from the Model 3142C before dropping
vertically.
Both horizontal and vertical polarization is easily accomplished when the
Model 3142C with the optional end plates is mounted on a tower, but vertical
polarization on a tripod requires special consideration. Because immunity power
requirements are many dB lower for vertical polarization, the T end frames can
be removed when mounting vertically on a standard tripod. A special tripod is
available from ETS-Lindgren for vertical polarization with T bow-ties intact.
Please contact ETS-Lindgren for the recommended mounting scheme.
Mounting Instructions | 15
Archived 01/19/11