ETS-Lindgren 3180B Broadband Mini-Bicon Antenna - Manual (Page 14)

14 | Specifications
Physical Specifications
C ONICAL E LEMENTS
Model 3180B, Conical Elements
Width (Element, tip-to-tip): 30.0 cm
11.8 in
Length: 60.5 cm
23.8 in
Diameter: 16.5 cm
6.5 in
ETS-Lindgren recommends using a 6 dB pad attached to the end of
the antenna; otherwise, high VSWR may occur.