JK3040
- 2 Elements on 40M
- 2 Elements on 30M
- 18 Foot Boom
The JK3040 is a short boom 2 element 40m Yagi that has excellent gain and F/R with an interlaced 2-element 30M yagi.
This antenna is made for the DX'er that is looking for an antenna to work across the globe on 30M & 40M.
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.
We can also provide you with custom settings to suit your operating preference such as peaking your gain and F/B in the CW portion or the Phone portion of the band.
Enjoy 6+ dbi of Freespace Peak gain or 11+ dbi of Peak gain at 70ft above Avg. ground !!!
JK3040 spec sheet
| 40M | 30M | |
|---|---|---|
| Number Elements | 2 | 2 |
| Active Boom Length | 17.5 ft | 11.5 ft |
| Peak Gain * (dBi) | 6.2 dBi | 6.4 dBi |
| Peak Gain * (dBd) | 4.06 dBd | 4.26 dBd |
| Peak F/B | 20 dB | 20+ dB |
| Peak F/R | 18 dB | 18 dB |
| 2:1 SWR Bandwidth | 175 kHz | - |
| 1.5:1 SWR Bandwidth | 120 kHz | 50 kHz |
| Max Element Length | 47.5 ft | 32.4 ft |
Tap a band or swipe the cards →
40M
- Number Elements
- 2
- Active Boom Length
- 17.5 ft
- Peak Gain * (dBi)
- 6.2 dBi
- Peak Gain * (dBd)
- 4.06 dBd
- Peak F/B
- 20 dB
- Peak F/R
- 18 dB
- 2:1 SWR Bandwidth
- 175 kHz
- 1.5:1 SWR Bandwidth
- 120 kHz
- Max Element Length
- 47.5 ft
30M
- Number Elements
- 2
- Active Boom Length
- 11.5 ft
- Peak Gain * (dBi)
- 6.4 dBi
- Peak Gain * (dBd)
- 4.26 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.
- 122 lbs
- Wind Area “C”
- 8.82 Sq Ft
- Wind Area “G”
- 15.87 Sq Ft
- Projected Area
- 13.23 Sq Ft
- Max Wind Speed
- 100 Mph
- Max Turning Radius
- 26 Ft
- Boom
- 2" OD
- Feedpoint
- Shunt coil match · Single Feed
- Power
- 5KW Avg or Balun restricted
Plots by band
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** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware.