ETS-Lindgren 3148B Log Periodic Dipole Array - Manual (Page 18)

18 | Mounting Instructions
Using the Stinger Mount
The stinger on the Model 3148B enables you to mount to antenna directly to an
ETS-Lindgren 7-TR Tripod Positioner or mast.
Additional hardware is required to use the stinger to mount the
Model 3148B to a mast. For information on ordering optional mounting
hardware, contact the ETS-Lindgren Sales Department.
Do not use the stinger to mount the Model 3148B onto a 4-TR tripod.