ETS-Lindgren 3140B Hybrid Log Periodic and Bowtie (BiConiLog) - Manual (Page 24)

Using Included Adapters to Mount to an Offset Boom
A TTACH I NCLUDED M OUNTING A DAPTERS TO M ODEL 3140B
To allow manual polarization of the Model 3140B, install the 100989
polarizing adapters with the curve at the top of each adapter facing the
same direction. To prohibit manual polarization, install one adapter
with the curve facing the opposite direction from the other.
1. Place one 100989 polarizing adapter between the shoulders of one of
the mounting brackets on the antenna.
Do not cross thread or permanent damage to the adapter and
thread insert could occur.
2. Thread a bracket knob through the mounting bracket, then through the
polarizing adapter, and finally through the hex nut.
3. Tighten the mounting knob to secure the antenna.
4. Repeat steps 1, 2, and 3 for the remaining polarizing adapter and
mounting bracket.
24 | Mounting Instructions