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6815

Model: 6815

This is a directional system. Designed for 7.5 kW for a single bay.

  • Pressurization Needed
  • Directional system with custom mounts
  • Allows multiplexing of closely-spaced stations (<2.2 MHz separation)

Performance Specifications

  • Polarization: Right Circular
  • VSWR: Under 1.05 :1 or better at center frequency
  • 1.1 : 1 ± 200 kHz from center frequency
  • 1.15 : 1 or better to ± 400 kHz

Azimuth Pattern Circularity: Horizontal component + 1.5 dB on Pole
Input Connection: 1-5/8″ EIA Female, 3-1/8″ EIA

SKU: 6815

Description

Model: 6815

This is a directional system. Designed for 7.5 kW for a single bay.

  • Pressurization Needed
  • Directional system with custom mounts
  • Allows multiplexing of closely-spaced stations (<2.2 MHz separation)

Performance Specifications

  • Polarization: Right Circular
  • VSWR: Under 1.05 :1 or better at center frequency
  • 1.1 : 1 ± 200 kHz from center frequency
  • 1.15 : 1 or better to ± 400 kHz

Azimuth Pattern Circularity: Horizontal component + 1.5 dB on Pole
Input Connection: 1-5/8″ EIA Female, 3-1/8″ EIA

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Electrical Specifications
Options
Installation & Mounting
Typical Patterns

6815 Full-wave Spaced

No. of BaysGainPower Rating
PowerdbkW
10.45-3.437.5
20.99-0.0415
31.561.9215
42.143.3015
52.734.3615
63.335.2215
73.935.9415
84.536.5615

***Gain values are for 93.1 MHz (low-band) and 103.1 MHz (high-band) and vary less than 5% at the edges. Our gain figures are calculated by factoring the directivity to allow for losses in the radiating system. Due to this conservative approach, you are assured of radiating maximum ERP by using Shively’s published gain figures. Gain is provided for one polarization and is equal in circularly polarized antennas for both horizontal and vertical components. Gain will be reduced if special H/V ratio, or special wavelength spacing is provided.

Options:
-Custom Mounts
-Radomes
-1-5/8″ Frequency Agile Fine Matching Transformer
-3-1/8″ Frequency Agile Fine Matching Transformer
-Parastic for Custom Patterns

Replacement Parts:
Radome
Bay
Pressure Relief Valve (p/n 52471-01)
1-5/8″ Frequency Agile Fine Matching Transformer
3-1/8″ Frequency Agile Fine Matching Transformer
Standard Mount

No Factory personal needed for installation. Please read the installation manual in full before assembly on site.

Installation & Mounting Layout

Model 6815 Vertical Tower Space

No. of BaysAntenna radiation aperturePhysical space used Total tower space recommended
ftmftmftm
120.61123.66206.10
2103.05226.71309.14
3206.1329.754012.19
4309.144212.805015.24
54012.195215.856018.29
65015.246218.907021.34
76018.297221.958024.38
87021.347422.569027.44

Model 6815 Antenna Weight & Wind Load

Weight Full-wave Spaced

No. of BaysWithout radomesWith radomesWith radomes &
1/2" (1.2 cm) radial ice
With radomes &
1" (2.5 cm) radial ice
With radomes &
1 1/2" (3.8 cm) radial ice
lbNlbNlbNlbNlbN
148.0214118.0525204.9911298.51328398.71773
296.4429236.41052323.31438416.91854517.12300
3144.8644354.81578441.71965535.32381635.52827
4193.2859473.22105560.12491653.72908753.93353
5241.61075591.62631678.53018772.13434872.33880
6290.01290710.03158796.93545890.53961990.24404
7338.41505828.43685915.340711009448811094933
8386.81720946.842111033.745981127501312275458

Windload Full-wave Spaced

No. of BaysWithout radomesWith radomesWith radomes &
1/2" (1.2 cm) radial ice
With radomes &
1" (2.5 cm) radial ice
With radomes &
1 1/2" (3.8 cm) radial ice
ft2ft2ft2ft2ft2
EPANEPATEPANEPATEPANEPATEPANEPATEPANEPAT
12.952.164.514.185.124.675.735.176.355.67
25.894.329.028.3610.249.3511.4610.3412.7011.34
38.846.4913.5412.5415.3614.0217.1915.5119.0417.01
411.798.6518.0516.7220.4718.7022.9220.6825.3922.67
514.7310.8122.5620.9025.5923.3728.6525.8531.7428.34
617.6812.9727.0725.0730.7128.0434.3831.0238.0934.01
720.6315.1331.5929.9535.8332.7240.1136.1944.4439.68
823.5717.2936.1033.4340.9537.3945.8441.3650.7945.35

Notes:
WINDLOAD TABLE(S)
1. Antenna radiation aperture is the distance from the center of the top bay to the center of the bottom bay. Five feet (1.5 m) of the pipe is required above the top of the top bay and below the bottom bay. Total tower space recommended allows ten feet (3 m) of clear tower space above the center line of the top bay and below the center line of the bottom bay, to protect from pattern interference by other antennas. At frequencies lower than 98 MHz, each of these dimensions will increase by up to 1 foot (0.3 m) per bay.
2. Windload and weight tabulations assume full-wave bay spacing and include the bay, mounts and interbay feedline.
3. Antenna areas and weights calculated in accordance with TIA-222-G. EPA(N) – Effective projected area associated with the windward face normal to the azimuth of the antenna: EPA(N) = (Ca AA )N EPA(T) – Effective projected area associated with the windward face at the side of the antenna: EPA(T) = (Ca AA )T Assumptions: Structure Class II; Exposure category C; Topographic category 1; Maximum basic windspeed 90 mph; with 1/2 inch design ice, 40 mph; Maximum height above ground 200 ft.
4. 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.

Typical Elevation Patterns
These patterns are based on 98.1 MHz, no beam tilt, no null fill. Contact factory for your customized elevation pattern

6815 Elevation Patterns Full-wave Spaced
6815-1
6815-2
6815-3
6815-4
6815-5
6815-6
6815-7
6815-8

Special Angle/Elliptical Polarization: Contact factory for elevation patterns

Sample Azimuth Patterns for Shively Series 6815 FM Antenna
NOTE: Model 6815 is a directional antenna. Custom Directional Pattern work is available.

6815 Sample Azimuth Patterns
*Mounted on a 5″ pole
*Mounted as a Pick-Up-Two Leg on a 24″ Tower
*Mounted on a Leg of a 48″ Face Tower

SKU: 6815 CATEGORY: TAGS: