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SPARTAN - 2 Elements on17M / 2 Elements on 20M / 2 Elements on 40M / 18 Foot Boom

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.

Price : US$2085.00 **

Approx wt. = 115 lbs

Wind Area "C" = 10.67 Sq. Ft

                  "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

Peak Gain is shown over a dipole in Freespace
Dipole in Freespace = 2.14dBi

FREESPACE PLOTS - Single Antenna

2

9.5 ft

4.5+ dBd/ 6.5+ dbi

10+ dB

10+ dB

Less than 1:5:1

100 kHz

27.5 ft

2

11 ft

4.4 dBd/ 6.5+ dbi

10+ dB

10+ dB

450 kHz

300 kHz

36.5 ft

2

17.5 ft

4+ dBd/ 6+ dbi

10 dB

10 dB

190 kHz

140 kHz

47.5 ft

17M

20M

40M

Number of

Elements

Active Boom Length

Peak Gain *

Peak F/B

Peak F/R

2:1 SWR Bandwidth

1.5:1 SWR Bandwidth

Max Element Length

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

** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware

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The next generation in design, quality and manufacturing