ETS-Lindgren 3144 Log Periodic Dipole Array - Manual (Page 17)

Do not cross thread or permanent damage to the adapter could occur.
4. Thread the mounting knob through the mounting bracket, then through
the polarizing adapter, and finally through the hex nut.
5. Tighten the mounting knob to secure the antenna.
6. Attach the polarizing adapter and antenna to tripod or tower, as
required.
A DDITIONAL 4-TR M OUNTING O PTIONS
Following are additional options for mounting the Model 3144 onto an
ETS-Lindgren 4-TR tripod. Contact the ETS-Lindgren Sales Department for
information on ordering optional mounting hardware.
Mounting & Assembly | 17