Shively Labs FM Antennas and Accessories
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Typical Data for
Model 6510 FM Antenna (full-wave-spaced)

  • Vertical Polarization
  • 10 kW Power Rating per Bay
  • Radomes & Deicers Not Required
  • Shively Standard Features:
    • Low Weight and Windload
    • Adjustable Transformer Standard Equipment
    • Rugged Corrosion-Resistant Mounts
    • Easy to Install - Minimum Maintenance
    • Pressure Relief Valve for Easy Purging
    • Pattern Studies and Directional Patterns Available

Performance Specifications:

Polarization:
Vertical only.
VSWR:
1.04 : 1 or better, ± 100 KHz.
1.06 : 1 ± 200 kHz
Input Connection:
Female 3-1/8" EIA.
Feedline:
3-1/8" rigid

Electrical Specifications (full-wave-spaced):
No. of
Bays		 Gain
 Power
Rating
kW		 No. of
Bays		 Gain
 Power
Rating
kW
Power dB Power dB
1
0.92
-0.36
10
7
7.74
8.89
40
2
1.98
2.97
20
8
8.92
9.50
40
3
3.10
4.91
30
10
11.3
10.5
40
4
4.24
6.27
40
12
13.7
11.4
40
5
5.40
7.32
40
14
16.1
12.1
40
6
6.56
8.17
40
16
18.5
12.7
40

Notes:

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

Gain is provided for vertical polarization only. Gain will be reduced if null fill, beam tilt, or special wavelength spacing is provided. Gain will increase in a directional array by the directivity of the azimuth pattern.

Size and Weight (full-wave-spaced):
No. of Bays Vertical Tower Space
 Weight
Antenna radiation aperture
 Physical
space used
 Total tower space recommended
 without
ice
 with 1/2"
radial ice
ft m ft m ft m lb N lb N
1
4
1.3
9
3.0
20
6.6
71
317
164
731
2
10
3.3
19
6.2
30
9.8
129
575
351
1565
3
20
6.6
29
9.5
40
13.1
187
834
538
2399
4
30
9.8
39
12.8
50
16.4
245
1093
725
3234
5
40
13.1
49
16.1
60
19.7
303
1351
911
4063
6
50
16.4
59
19.4
70
23.0
361
1610
1098
4897
7
60
19.7
69
22.6
80
26.2
420
1873
1285
5731
8
70
23.0
79
25.9
90
29.5
472
2105
1448
6458
10
90
29.5
99
32.5
110
36.1
563
2511
1821
8122
12
110
36.1
119
39.0
130
42.6
680
3033
2195
9790
14
130
42.6
139
45.6
150
49.2
796
3550
2568
11453
16
150
49.2
159
52.2
170
55.8
912
4068
2942
13121

Windload (full-wave-spaced):
No. of
Bays		 Revision "C"
 Revision "F"
without ice
 with 1/2" radial ice
 without ice
 with 1/2" radial ice
lb N lb N ft² m² ft² m²
1
158
705
221
986
4.7
0.4
6.0
0.6
2
308
1374
433
1931
9.9
0.9
13.2
1.2
3
459
2047
645
2877
15.0
1.4
20.0
1.9
4
609
2716
858
3827
20.1
1.9
26.8
2.5
5
760
3390
1070
4772
25.2
2.3
33.6
3.1
6
911
4063
1282
5718
30.3
2.8
40.4
3.8
7
1061
4732
1494
6663
35.4
3.3
47.2
4.4
8
1194
5325
1682
7502
39.8
3.7
53.1
4.9
10
1495
6668
2106
9393
50.0
4.6
66.7
6.2
12
1796
8010
2530
11284
60.2
5.6
80.3
7.5
14
2097
9353
2954
13175
70.4
6.5
93.9
8.7
16
2398
10695
3378
15066
80.6
7.5
107.5
10.0

Notes:

  1. The mounting structure must not flex more than ± 1/2 in (± 1.2 cm) in any 10-ft (3-meter) section. 5 feet (1.5 m) of mounting structure is required above and below the antenna bays for proper pattern formation.
  2. 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.
  3. 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.
  4. 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.
  5. 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).
  6. 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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Last updated: 02/26/2007
Webmaster: Al Friend
© Copyright 2007 Howell Laboratories, Inc.