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Spartan 17m 20m 40m Yagi

SPARTAN

  • 2 Elements on 17M
  • 2 Elements on 20M
  • 2 Elements on 40M
  • 18 Foot Boom
PriceUS$3,285.00**
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The Spartan (Tribander) has been designed for the bottom of the sun-spot cycle and also to act as a simple 2-element monobander yagi on 17M, 20M & 40M. This design was accomplished by interlacing a 2-el-20 & 2-el-17 on to the same boom as the JK402.

Here are the important features ....

  1. The feed point for 17M, 20M & 40M are connected using a transmission line, the same way as the JK-MidTri & JK-BigTri.
  2. The mast mount position is right at the center of the antenna at 108".
  3. All the 3 bands are connected with a single-feed (50-ohms)
  4. The overall gain and swr on all bands is consistent & provides excellent performance.
SPARTAN element layout
Specifications

SPARTAN spec sheet

17M20M40M
Number of Elements222
Active Boom Length9.5 ft11 ft17.5 ft
Peak Gain * (dBi)6.5+ dBi6.5+ dBi6+ dBi
Peak Gain * (dBd)4.5+ dBd4.4 dBd4+ dBd
Peak F/B10+ dB10+ dB10 dB
Peak F/R10+ dB10+ dB10 dB
2:1 SWR BandwidthSWR less than 1.5:1 across the entire band450 kHz190 kHz
1.5:1 SWR Bandwidth100 kHz300 kHz140 kHz
Max Element Length27.5 ft36.5 ft47.5 ft
17M20M40M

Tap a band or swipe the cards →

17M

Number of Elements
2
Active Boom Length
9.5 ft
Peak Gain * (dBi)
6.5+ dBi
Peak Gain * (dBd)
4.5+ dBd
Peak F/B
10+ dB
Peak F/R
10+ dB
2:1 SWR Bandwidth
SWR less than 1.5:1 across the entire band
1.5:1 SWR Bandwidth
100 kHz
Max Element Length
27.5 ft

20M

Number of Elements
2
Active Boom Length
11 ft
Peak Gain * (dBi)
6.5+ dBi
Peak Gain * (dBd)
4.4 dBd
Peak F/B
10+ dB
Peak F/R
10+ dB
2:1 SWR Bandwidth
450 kHz
1.5:1 SWR Bandwidth
300 kHz
Max Element Length
36.5 ft

40M

Number of Elements
2
Active Boom Length
17.5 ft
Peak Gain * (dBi)
6+ dBi
Peak Gain * (dBd)
4+ dBd
Peak F/B
10 dB
Peak F/R
10 dB
2:1 SWR Bandwidth
190 kHz
1.5:1 SWR Bandwidth
140 kHz
Max Element Length
47.5 ft

* Peak gain is shown in free space. dBd = dBi − 2.1

*** PLEASE NOTE : 40M Performance or SWR curves can be adjusted for CW vs SSB operations

Mechanical

Approx wt.
115 lbs
Wind Area “C”
10.67 Sq. Ft
Wind Area “G”
19.19 Sq. Ft
Projected Area
16.01 Sq. Ft
Max Wind Speed
100 Mph
Max Turning Radius
26 Ft
Feedpoint
Direct 50-Ohm
Patterns & SWR

Plots by band

SPARTAN 17M freespace plots - single antenna
17M · FREESPACE PLOTS - Single Antenna
SPARTAN 17M swr
17M · SWR
SPARTAN 20M freespace plots - single antenna
20M · FREESPACE PLOTS - Single Antenna
SPARTAN 20M swr
20M · SWR
SPARTAN 40M freespace plots - single antenna
40M · FREESPACE PLOTS - Single Antenna
SPARTAN 40M swr
40M · SWR

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