ETS-Lindgren 3140B Hybrid Log Periodic and Bowtie (BiConiLog) - Manual (Page 22)

A TTACH V E LEMENTS
9. Attach the V elements and tighten the thumbscrews through the boom
The Model 3140B is now ready for mounting to a tripod or mast. See
Mounting Instructions on page 23.
22 | Assembly Instructions