JK Big-Tri
- 4 Elements on 20M
- 5 Elements on 15M
- 7 Elements on 10M
- 36 Foot Boom
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 spec sheet
| 10M | 15M | 20M | |
|---|---|---|---|
| Number Elements | 7 | 5 | 4 |
| Active Boom Length | 31 ft | 31.7 ft | 30 ft |
| Peak Gain * (dBi) | 11+ dBi | 10.3+ dBi | 9+ dBi |
| Peak Gain * (dBd) | 9+ dBd | 8.2+ dBd | 7+ dBd |
| Peak F/B | 20+ dB | 20+ dB | 15+ dB |
| Peak F/R | 20+ dB | 20+ dB | 15+ dB |
| 2:1 SWR Bandwidth | 850 kHz | SWR less than 1.5:1 across the entire band | SWR less than 1.5:1 across the entire band |
| 1.5:1 SWR Bandwidth | 750 kHz | 450 kHz | 350 kHz |
| Max Element Length | 18 ft | 24.25 ft | 36.5 ft |
Tap a band or swipe the cards →
10M
- Number Elements
- 7
- Active Boom Length
- 31 ft
- Peak Gain * (dBi)
- 11+ dBi
- Peak Gain * (dBd)
- 9+ dBd
- Peak F/B
- 20+ dB
- Peak F/R
- 20+ dB
- 2:1 SWR Bandwidth
- 850 kHz
- 1.5:1 SWR Bandwidth
- 750 kHz
- Max Element Length
- 18 ft
15M
- Number Elements
- 5
- Active Boom Length
- 31.7 ft
- Peak Gain * (dBi)
- 10.3+ dBi
- Peak Gain * (dBd)
- 8.2+ dBd
- Peak F/B
- 20+ dB
- Peak F/R
- 20+ dB
- 2:1 SWR Bandwidth
- SWR less than 1.5:1 across the entire band
- 1.5:1 SWR Bandwidth
- 450 kHz
- Max Element Length
- 24.25 ft
20M
- Number Elements
- 4
- Active Boom Length
- 30 ft
- Peak Gain * (dBi)
- 9+ dBi
- Peak Gain * (dBd)
- 7+ dBd
- Peak F/B
- 15+ dB
- Peak F/R
- 15+ dB
- 2:1 SWR Bandwidth
- SWR less than 1.5:1 across the entire band
- 1.5:1 SWR Bandwidth
- 350 kHz
- Max Element Length
- 36.5 ft
* Peak gain is shown in free space. dBd = dBi − 2.1
Mechanical
- Approx wt.
- 140 lbs
- Wind Area “C”
- 14.8 Sq. Ft
- Wind Area “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
Plots by band
Click any plot to open it full size.
** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware.