BUDDIPOLE IN THE FIELD
BUDDIPOLE IN THE FIELD
BUDDIPOLE IN THE FIELD
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Standard<br />
Buddipole<br />
4x arms<br />
9.5' whip<br />
TRSB<br />
Vertical element<br />
9.5 foot whip: 6 sections (all out)<br />
Four antenna accessory arm<br />
Red coil: tap 18<br />
Radials<br />
25 feet (300 inches)<br />
The above configuration provides a 202 inch radiator which is expected<br />
to present about 8 ohms of radiation resistance. This extends the 3:1<br />
SWR bandwidth to about 170 kHz (over half the band).<br />
SWR plot for 40m vertical<br />
Far field plot for 40m vertical<br />
96<br />
Figure 42 SWR and far field plot for a 200+ inch radiator 40m vertical<br />
Finally, a radiator with four arms and the 12 foot shock-cord whip has<br />
an expected radiation resistance of about 11 ohms. Use coil tap 16. The<br />
3:1 SWR bandwidth for this configuration is over 200 kHz.
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