Call us at: +1 475 289 2222
JK Mid-Tri
3 Elements on 20M / 4 Elements on 15M / 5 Elements on 10M / 24 Foot Boom
JK Mid-Tri-40
2 Elements on 40M/ 3 Elements on 20M/ 4 Elements on 15M/5 Elements on 10M/26 Foot Boom
The JK Mid-Tri (Tribander) has been designed for Hams looking for a Mid level, cost effective but high quality Tribander antenna.
This TriBander 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.
We have specifically focused on the mounting position of this Mid-Tri Yagi to enable stacking of this antenna on the side of a tower. A good 3ft spacing between the elements gives the side-mounting option on most towers available in the market today.
If you also need 40M, check out the JK Mid-Tri-40 !! The 40M band has its own feedpoint which enables you to stack a
JK Mid-Tri-40 on the top with a JK Mid-Tri on the bottom in a stack (see stack plots below).
The antennas have 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.
Peak Gain is shown over a dipole in Freespace
Dipole in Freespace = 2.14dBi
Price : US$1,995.00 **
JK Mid-Tri
JK Mid-Tri
Approx wt. = 98 lbs
Wind Area "C" = 10.6 Sq. Ft
"G" = 19.06 Sq. Ft
Projected Area = 16.0 Sq. Ft
Max Wind Speed = 100 Mph
Max Turning Radius = 22 Ft
Feedpoint = Direct 50-Ohm
JK Mid-Tri-40
Approx wt. = 163 lbs
Wind Area "C" = 16.5 Sq. Ft
"G" = 29.7 Sq. Ft
Projected Area = 24.75 Sq. Ft
Max Wind Speed = 100 Mph
Max Turning Radius = 27.7 Ft
Feedpoint = Dual Feed
20/15/10 = Direct 50-Ohm
40M = 50-Ohm Shunt Match
Price : US$3,795.00 **
Click here for a PDF version of the MidTri manual
BUY NOW
Click here for a PDF version of the MidTri40 manual
|
10M |
15M |
20M |
40M |
Number Elements |
5 |
4 |
3 |
2 |
Active Boom Length |
19.5 ft |
20.3 ft |
20.9 ft |
19.25 ft |
Peak Gain* |
7.5 dBd/ 9.5 - 10+ dbi |
6.9 dBd/ 9+ dbi |
5.3 dBd/ 7.44 dbi |
4.2 dBd/ 6.34dbi |
Peak F/B |
20+ dB |
18+ dB |
20+ dB |
15 dB |
Peak F/R |
15+ dB |
18+ dB |
20+ dB |
15+ dB |
2:1 SWR Bandwidth |
850 KHz |
Less than 1.5:1 across the band |
Less than 1.5:1 across the band |
175 KHz |
1.5:1 SWR Bandwidth |
650 KHz |
450 KHz |
350 KHz |
130 KHz |
Max Element Length |
18 ft |
24.25 ft |
36.5 ft |
47.5 ft |
Please click here for NEC4 Freespace Tabulated Gain, SWR values
FREESPACE PLOTS - Single Antenna
STACK Plots - spaced at 35Ft. (Freespace)
70 feet above Ground PLOTS
- Single Antenna
*** Gain above ground are NEC4 modeled numbers over Average/Flat ground ***
JK MidTri-40 : NEC4 - Freespace Gain, SWR & F/B values
|
Freq |
R |
X |
SWR |
Gain |
Azimuth
Angle |
F/B |
F/R |
|
28.000 |
44.50 |
-4.01 |
1.155 |
9.30 |
0 |
17.37 |
13.64 |
|
28.050 |
47.28 |
-3.88 |
1.102 |
9.43 |
0 |
17.73 |
13.82 |
|
28.100 |
49.53 |
-4.01 |
1.084 |
9.55 |
0 |
18.19 |
14.00 |
|
28.150 |
51.15 |
-4.27 |
1.091 |
9.67 |
0 |
18.78 |
14.21 |
|
28.200 |
52.05 |
-4.45 |
1.101 |
9.78 |
0 |
19.53 |
14.45 |
|
28.250 |
52.21 |
-4.31 |
1.099 |
9.89 |
0 |
20.51 |
14.74 |
|
28.300 |
51.69 |
-3.61 |
1.082 |
9.99 |
0 |
21.83 |
15.09 |
|
28.350 |
50.67 |
-2.10 |
1.045 |
10.07 |
0 |
23.65 |
15.50 |
|
28.400 |
49.38 |
0.37 |
1.015 |
10.14 |
0 |
26.32 |
16.01 |
|
28.450 |
48.12 |
3.90 |
1.092 |
10.19 |
0 |
30.46 |
16.62 |
|
28.500 |
47.23 |
8.44 |
1.200 |
10.19 |
0 |
34.74 |
17.31 |
|
28.550 |
47.07 |
13.80 |
1.336 |
10.14 |
0 |
30.01 |
18.06 |
|
28.600 |
48.02 |
19.48 |
1.487 |
10.00 |
0 |
24.97 |
18.77 |
|
28.650 |
50.15 |
24.44 |
1.621 |
9.74 |
0 |
21.57 |
19.31 |
|
28.700 |
52.41 |
26.91 |
1.685 |
9.31 |
0 |
19.20 |
19.20 |
|
28.750 |
50.57 |
25.99 |
1.668 |
9.05 |
0 |
17.46 |
17.46 |
|
Freq |
R |
X |
SWR |
Gain |
Azimuth
Angle |
F/B |
F/R |
|
21.000 |
42.97 |
-9.06 |
1.280 |
8.56 |
0 |
20.00 |
20.00 |
|
21.025 |
43.70 |
-7.43 |
1.231 |
8.61 |
0 |
20.48 |
20.48 |
|
21.050 |
44.50 |
-5.82 |
1.185 |
8.65 |
0 |
20.81 |
20.81 |
|
21.075 |
45.38 |
-4.25 |
1.141 |
8.70 |
0 |
21.01 |
21.01 |
|
21.100 |
46.33 |
-2.74 |
1.100 |
8.75 |
0 |
21.04 |
21.04 |
|
21.125 |
47.33 |
-1.32 |
1.063 |
8.79 |
0 |
20.91 |
20.91 |
|
21.150 |
48.37 |
0.01 |
1.034 |
8.84 |
0 |
20.67 |
20.67 |
|
21.175 |
49.43 |
1.21 |
1.027 |
8.89 |
0 |
20.34 |
20.34 |
|
21.200 |
50.47 |
2.25 |
1.047 |
8.93 |
0 |
19.93 |
19.93 |
|
21.225 |
51.45 |
3.13 |
1.070 |
8.97 |
0 |
19.48 |
19.48 |
|
21.250 |
52.32 |
3.82 |
1.091 |
9.02 |
0 |
19.04 |
19.04 |
|
21.275 |
53.00 |
4.31 |
1.107 |
9.06 |
0 |
18.58 |
18.58 |
|
21.300 |
53.41 |
4.64 |
1.118 |
9.09 |
0 |
18.13 |
18.13 |
|
21.325 |
53.47 |
4.83 |
1.122 |
9.13 |
0 |
17.72 |
17.72 |
|
21.350 |
53.09 |
4.96 |
1.120 |
9.16 |
0 |
17.33 |
17.33 |
|
21.375 |
52.20 |
5.12 |
1.115 |
9.18 |
0 |
16.96 |
16.96 |
|
21.400 |
50.75 |
5.45 |
1.115 |
9.21 |
0 |
16.65 |
16.65 |
|
21.425 |
48.73 |
6.09 |
1.134 |
9.23 |
0 |
16.37 |
16.37 |
|
21.450 |
46.18 |
7.21 |
1.185 |
9.24 |
0 |
16.13 |
16.13 |
|
Freq |
R |
X |
SWR |
Gain |
Azimuth
Angle |
F/B |
F/R |
|
14.000 |
39.77 |
-2.89 |
1.269 |
7.41 |
0 |
20.58 |
20.58 |
|
14.025 |
40.40 |
-1.71 |
1.242 |
7.41 |
0 |
21.15 |
21.15 |
|
14.050 |
41.01 |
-0.49 |
1.220 |
7.42 |
0 |
21.72 |
21.72 |
|
14.075 |
41.60 |
0.76 |
1.203 |
7.42 |
0 |
22.23 |
22.23 |
|
14.100 |
42.15 |
2.06 |
1.193 |
7.43 |
0 |
22.69 |
22.69 |
|
14.125 |
42.69 |
3.39 |
1.190 |
7.44 |
0 |
23.09 |
23.09 |
|
14.150 |
43.20 |
4.77 |
1.195 |
7.45 |
0 |
23.39 |
23.26 |
|
14.175 |
43.70 |
6.20 |
1.208 |
7.46 |
0 |
23.59 |
23.43 |
|
14.200 |
44.17 |
7.69 |
1.228 |
7.47 |
0 |
23.66 |
23.61 |
|
14.225 |
44.62 |
9.23 |
1.253 |
7.48 |
0 |
23.62 |
23.62 |
|
14.250 |
45.06 |
10.84 |
1.284 |
7.50 |
0 |
23.46 |
23.46 |
|
14.275 |
45.48 |
12.51 |
1.321 |
7.52 |
0 |
23.19 |
23.19 |
|
14.300 |
45.88 |
14.25 |
1.361 |
7.53 |
0 |
22.82 |
22.82 |
|
14.325 |
46.27 |
16.07 |
1.407 |
7.55 |
0 |
22.39 |
22.39 |
|
14.350 |
46.65 |
17.96 |
1.457 |
7.57 |
0 |
21.90 |
21.90 |
|
Freq |
R |
X |
SWR |
Gain |
Azimuth
Angle |
F/B |
F/R |
|
7.070 |
91.52 |
-24.76 |
2.014 |
7.15 |
0 |
8.12 |
8.12 |
|
7.080 |
76.95 |
-20.25 |
1.711 |
7.08 |
0 |
9.04 |
9.04 |
|
7.090 |
66.71 |
-15.66 |
1.483 |
6.95 |
0 |
10.63 |
10.63 |
|
7.100 |
59.26 |
-11.56 |
1.312 |
6.80 |
0 |
12.20 |
12.20 |
|
7.110 |
53.64 |
-8.04 |
1.186 |
6.64 |
0 |
13.63 |
13.63 |
|
7.120 |
49.23 |
-5.08 |
1.109 |
6.49 |
0 |
14.72 |
14.72 |
|
7.130 |
45.66 |
-2.59 |
1.112 |
6.34 |
0 |
15.25 |
15.25 |
|
7.140 |
42.69 |
-0.49 |
1.172 |
6.20 |
0 |
15.15 |
15.15 |
|
7.150 |
40.14 |
1.29 |
1.248 |
6.06 |
0 |
14.62 |
14.62 |
|
7.160 |
37.91 |
2.82 |
1.329 |
5.93 |
0 |
13.84 |
13.84 |
|
7.170 |
35.92 |
4.14 |
1.412 |
5.80 |
0 |
12.99 |
12.99 |
|
7.180 |
34.11 |
5.30 |
1.496 |
5.68 |
0 |
12.18 |
12.18 |
|
7.190 |
32.45 |
6.34 |
1.583 |
5.57 |
0 |
11.43 |
11.43 |
|
7.200 |
30.91 |
7.28 |
1.672 |
5.47 |
0 |
10.74 |
10.74 |
|
7.210 |
29.47 |
8.14 |
1.764 |
5.37 |
0 |
10.12 |
10.12 |
|
7.220 |
28.12 |
8.95 |
1.860 |
5.27 |
0 |
9.57 |
9.57 |
|
7.230 |
26.85 |
9.70 |
1.959 |
5.19 |
0 |
9.06 |
9.06 |
|
7.240 |
25.65 |
10.42 |
2.062 |
5.11 |
0 |
8.61 |
8.61 |
|
7.250 |
24.51 |
11.11 |
2.170 |
5.02 |
0 |
8.20 |
8.20 |
** All pricing shown assumes the basic mounting hardware. Additional costs may apply for customized mast plates and hardware