160m/80m Spider Pole
About
This uses an 18m Fibreglass pole (SpiderPole/DX-Commander type). Despite the pole being 18m long, we did not use the top 3 meters. Instead we ran a 'Top Hat' or a Capacitance Hat' from Aprox 15m. Each Leg was 12.5m in length.
There was a significant radial field laid out.
This antenna requires aprox 900 Sq Meters (10,000 Sq Feet) of space - mainly due to the radials.
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Far Field Plot
4Nec2 Source
CM 160m vertical with top hat CE SY Z=15 SY HATZ=14.9 GW 1 11 0 0 0 0 0 HATZ 1.e-3 GW 3 11 0 0 HATZ 0 0 Z 5.e-4 GW 4 11 0 0 HATZ 0 9.9520274 7.6364592 5.e-4 GW 5 11 0 0 HATZ 0 -9.952027 7.6364592 5.e-4 GW 6 11 0 0 HATZ 9.9520274 0 7.6364592 5.e-4 GW 7 11 0 0 HATZ -9.952027 0 7.6364592 5.e-4 GE 1 LD 5 0 0 0 58000000 GN 3 0 0 0 10 0.002 EK EX 0 1 1 0 1.0000 0 0 FR 0 0 0 0 1.815 0 EN