Shively Labs FM Antennas and Accessories
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Personnel changes: Joe Rohrer retires; Dale Ladner promoted to fill his shoes.
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Awards
Shively Labs has won a techINK 2010 Innovation Award for our Graphical Power Meter system!
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Our Model 6020 antenna brings home the Radio World Coolstuff Award!
Articles

May-June 2008 Radio Guide article:
"Shively Labs Meets the Very Windy Mountain"

September 2007
Radio Guide articles:
"Shively Labs: Antennas That Work!" [279 kB]

"Shively 6014 Dual Hybrid Antenna Solves a Dilemma" [232 kB]

Typical Data for
Model 6814 FM Antenna (half-wave-spaced)

True Circular Polarization

Handles 25 kW per Bay

Multiplexes over 6 MHz Bandwidth

Shively Standard Features:

  • Ring Stub Design
  • Consistently Predictable Patterns
  • Low Weight and Windload
  • Digital Ready
  • Pattern Studies Available
  • No Factory Personnel Needed to Install
  • Adjustable Fine-Matching Transformer
  • Radomes and Deicers Available
  • Rugged Stainless Steel Corrosion-Resistant Mounts
  • Works with Regular Towers; No Need for Special Frequency-Sensitive Tower Sections
  • Pressure Relief Valve for Easy Purging of the System
  • Special Spacing, H/V Ratios, Null Fill and Beam Tilt Available

Performance Specifications:

Polarization:
Right circular.
VSWR:
1.05 : 1 ± 200 kHz for a single-frequency antenna.
1.1 : 1 over ± 200 KHz for a dual frequency antenna with up to 6 MHz frequency separation.
Azimuth Pattern Circularity:
Horizontal component ±1.5 dB on pole.
Input Connection:
Standard end-fed 2-7 bays: 3-1/8" EIA female flange.
Center-fed 40 kW: 3-1/8" EIA female flange; 80 kW: 6-1/8" EIA male flange
Special on request: 4-1/16" flange

Electrical Specifications (half-wave-spaced):
No. of
Bays		 Gain
 Power
Rating
kW		 No. of
Bays		 Gain
 Power
Rating, kW
3-1/8" T/L		 Power
Rating, kW
6-1/8" T/L
Power dB Power dB
2
0.70
-1.54
40
7
2.22
3.47
40
n/a
3
1.01
1.05
40
8
2.53
4.03
40
80
4
1.31
1.17
40
10
3.14
4.96
40
80
5
1.62
2.08
40
12
3.75
5.24
40
80
6
1.92
2.83
40

Notes:

Our gain figures are derived from the computed directivity and include the losses in the antenna feed system.

Gain is provided for one polarization and is equal in circularly polarized antennas for both horizontal and vertical components. Gain will be reduced if null fill, beam tilt, special H/V ratio, or special wavelength spacing is provided. Gain will increase in a directional array by the directivity of the azimuth pattern.

Size and Weight (half-wave-spaced):
No. of Bays Vertical Tower Space
 Weight
Antenna radiation aperture
 Physical
space used
 Total tower space recommended
 without
radomes
 with
radomes
 with radomes &
1/2"radial ice
ft m ft m ft m lb N lb N lb N
2
5
1.6
14
4.6
25
8.2
228
1017
368
1641
901
4018
3
10
3.3
19
6.2
30
9.8
320
1427
530
2364
1348
6012
4
15
4.9
24
7.9
35
11.5
412
1838
692
3086
1795
8006
5
20
6.6
29
9.5
40
13.1
504
2248
854
3809
2243
10004
6
25
8.2
34
11.2
45
14.8
597
2663
1017
4536
2690
11997
7
30
9.8
39
12.8
50
16.4
689
3073
1179
5258
3136
13987
8
35
11.5
38
12.5
55
18.0
772
3443
1332
5941
3553
15846
10
45
14.8
48
15.7
65
21.3
935
4170
1635
7292
4412
19678
12
55
18.0
58
19.0
75
24.6
1120
4995
1960
8742
5306
23665

Windload (half-wave-spaced):
No. of
Bays		 Revision "G," 90 mph
 Revision "G," 45 mph
without radomes
 with radomes
 with radomes & 1/2" radial ice
EPA(N)
 EPA(T)
 EPA(N)
 EPA(T)
 EPA(N)
 EPA(T)
ft² m² ft² m² ft² m² ft² m² ft² m² ft² m²
1
5.2
0.5
3.1
0.3
9.1
0.8
8.5
0.8
12.4
1.2
11.6
1.1
2
10.0
0.9
6.5
0.6
18.0
1.7
17.3
1.6
25.2
2.3
24.5
2.3
3
14.8
1.4
9.9
0.9
26.8
2.5
26.1
2.4
28.1
3.5
37.3
3.5
4
19.6
1.8
13.2
1.2
35.6
3.3
35.0
3.2
50.9
4.7
50.2
4.7
5
24.3
2.3
16.6
1.5
44.4
4.1
43.8
4.1
63.8
5.9
63.0
5.9
6
29.1
2.7
20.0
1.9
53.2
4.9
52.6
4.9
76.6
7.1
75.9
7.0
7
33.9
3.1
23.4
2.2
62.1
5.8
61.4
5.7
89.5
8.3
88.7
8.2
8
39.5
3.7
27.1
2.5
71.6
6.7
70.5
6.6
103.3
9.6
102.0
9.5
10
49.1
4.6
33.9
3.2
89.3
8.3
88.2
8.2
129.0
12.0
127.7
11.9
12
58.6
5.4
40.7
3.8
106.9
9.9
105.8
9.8
154.7
14.4
153.4
14.3

Notes:

  1. Ask for technical assistance at Shively for weight and windload information on ice thicker than 1/2 in.
  2. The mounting structure must not flex more than ± 3/4 in (1.8 cm) in any ten-foot (3-meter) section. Five feet (1.5 m) of mounting structure is required above and below the antenna bays for proper pattern formation.
  3. Antenna radiation aperture is the distance from the center of the top bay to the center of the bottom bay. Physical space used is from the top of the top bay to the input flange at the bottom of the array, or the bottom of the bottom bay in a center-fed array. Total tower space recommended allows ten feet (3 m) of clear tower space above and below the antenna to protect from pattern interference by other antennas. At frequencies lower than 98 MHz, each of these dimensions will increase by up to 1 ft (0.3 m) per bay.
  4. Seven bays or less are normally end-fed. All antennas supplied with beam tilt will be center-fed. Antennas with an odd number of bays are normally not available with center feed.
  5. Windload and weight tabulations are estimates and assume 98 MHz. They include the bay, interbay feedline, input connection, and a fine-matching transformer. No values have been included in these tabulations for mounts. Actual values vary with the specific installation. Contact us with details of your installation if more precise values are needed.
  6. Antenna windloads are calculated for 112 mph (180 kph), using 50 psf (2400 N/m²) for flats and 33 psf (1600 N/m²) for rounds] per EIA standard RS-222-C and CSA standard S37-94. The surface area is calculated per EIA standard RS-222-F (CaAc).
  7. Deicers add approximately 1 lb (4.4 N) per bay in weight and 2 lb (8.9 N) or 0.05 ft² (0.005 m²) per bay in windload.
  8. Ask for technical assistance at Shively if you are planning to mount antennas on AM towers or install them at altitudes over 3,000 ft (915 m) above mean sea level.
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