BUDDIPOLE IN THE FIELD

SWR plot for shortened vertical
Far field plot for 20m vertical
Figure 37 SWR and far field plot for 20m vertical
It is always desirable to create a full-sized antenna versus a shortened
one. The 20m band is the lowest band where this is possible and it
requires either four accessory antenna arms, or 12 foot shock-cord whip.
Either the standard coax assembly can be used, or the TRSB at the 1:1
setting can be used to feed this antenna. Unlike the shortened version
above, this full-sized vertical will provide 2:1 SWR bandwidth across the
entire 20m band.
Standard
Buddipole
Optional
Four arms
Long whip
12' whip
Vertical element
Option 1:
Long 9.5 foot whip: 6 sections (all out)
Four antenna accessory arm
Option 2:
12 foot whip
Two accessory antenna arms
Radials
17 feet sloping from 8' to 3'
90