JK3040Sr
- 4 Elements on 40M
- 3 Elements on 30M
- 36 Foot Boom
The JK3040Sr is the combination of the JK404C & the JK303 on the same boom with 2 independent feed-points.
This antenna is made for the DX'er that is looking for an antenna to work across the globe on 30M & 40M.
The Key feature of this antenna is that it can be mounted above or below Tribanders or other monobanders without any interaction.
It is made with very high quality materials and the best in its class in the market in terms of mechanical construction and electrical performance.
JK3040Sr spec sheet
| 40M | 30M | |
|---|---|---|
| Number Elements | 4 | 3 |
| Active Boom Length | 35.5 ft | 30 ft |
| Peak Gain * (dBi) | 7.3 dBi | 7.8 dBi |
| Peak Gain * (dBd) | 5.2 dBd | 5.6 dBd |
| Peak F/B | 23 dB | 20+ dB |
| Peak F/R | 22 dB | 18 dB |
| 2:1 SWR Bandwidth | 265 kHz | - |
| 1.5:1 SWR Bandwidth | 210 kHz | 50 kHz |
| Max Element Length | 49.5 ft | 32.4 ft |
Tap a band or swipe the cards →
40M
- Number Elements
- 4
- Active Boom Length
- 35.5 ft
- Peak Gain * (dBi)
- 7.3 dBi
- Peak Gain * (dBd)
- 5.2 dBd
- Peak F/B
- 23 dB
- Peak F/R
- 22 dB
- 2:1 SWR Bandwidth
- 265 kHz
- 1.5:1 SWR Bandwidth
- 210 kHz
- Max Element Length
- 49.5 ft
30M
- Number Elements
- 3
- Active Boom Length
- 30 ft
- Peak Gain * (dBi)
- 7.8 dBi
- Peak Gain * (dBd)
- 5.6 dBd
- Peak F/B
- 20+ dB
- Peak F/R
- 18 dB
- 2:1 SWR Bandwidth
- -
- 1.5:1 SWR Bandwidth
- 50 kHz
- Max Element Length
- 32.4 ft
* Peak gain is shown in free space. dBd = dBi − 2.1
*** Gain above ground figures are modeled over average/flat ground ***
Mechanical
- Approx wt.
- 215 lbs
- Wind Area “C”
- 16.1 Sq Ft
- Wind Area “G”
- 28.9 Sq Ft
- Projected Area
- 24.15 Sq Ft
- Max Wind Speed
- 100 Mph
- Max Turning Radius
- 31.25 Ft
- Boom
- 2.5" OD
- Feedpoint 40M
- 50-ohm Direct
- Feedpoint 30M
- Shunt Matched
- Power
- 5KW Avg or Balun restricted
Plots by band
*** Gain above ground figures are modeled over average/flat ground ***
*** Gain above ground figures are modeled over average/flat ground ***
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.