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The JK Big-Tri has been designed for Hams looking for a slightly longer boom Tribander while enjoying maximum performance on 20/15/10.
This Tri-Bander's elements follow the same taper schedules and element construction as the Navassa5 antenna.
This antenna is very specifically priced and marketed to the segment of the Ham community that wants to put up a Yagi with an outstanding signal and the best quality mechanical build in the marketplace.
This antenna has excellent Gain, F/R and SWR characteristics and is manufactured the same way as our larger Yagis with the same high quality materials and hardware.
JK Big-Tri 4 Elements on 20M / 5 Elements on 15M / 7 Elements on 10M / 36 Foot Boom
Peak Gain is shown over a dipole in Freespace
Dipole in Freespace = 2.14dBi
JK Big-Tri
Approx wt. = 140 lbs
Wind Area "C" = 14.8 Sq. Ft
"G" = 26.64 Sq. Ft
Projected Area = 22.2 Sq. Ft
Max Wind Speed = 100 Mph
Max Turning Radius = 25.4 Ft
Feedpoint = Direct 50-Ohm
|
10M |
15M |
20M |
Number Elements |
7 |
5 |
4 |
Active Boom Length |
31 ft |
31.7 ft |
30 ft |
Peak Gain* |
9+ dBd/ 11+ dbi |
8.2+ dBd/ 10.3+ dbi |
7+ dBd / 9+dbi |
Peak F/B |
20+ dB |
20+ dB |
15+ dB |
Peak F/R |
20+ dB |
20+ dB |
15+ dB |
2:1 SWR Bandwidth |
850 KHz |
Less than 1.5:1 across the band |
Less than 1.5:1 across the band |
1.5:1 SWR Bandwidth |
750 KHz |
450 KHz |
350 KHz |
Max Element Length |
18 ft |
24.25 ft |
36.5 ft |
** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware.
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© 2015 JK Antennas & Systems
