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6828

Model: 6828

This high power system is rated at 20 kW per bay and can multiplex over 10 MHz.

-Pressurization Needed
-Consistently predictable patterns
-Allows multiplexing up to 10 MHz.
-.9 Wavelength Spacing

Performance Specifications:
Polarization: Right Circular
VSWR: Single Bay <1.2 :1 over 10 Mhz
<1.1 : 1 over 7 Mhz

Azimuth Pattern Circularity: Horizontal component + 1.5 dB on Pole
Input Connection: Sized for your needs, please contact factory

SKU: 6828

Description

Model: 6828

This high power system is rated at 20 kW per bay and can multiplex over 10 MHz.

-Pressurization Needed
-Consistently predictable patterns
-Allows multiplexing up to 10 MHz.
-.9 Wavelength Spacing

Performance Specifications:
Polarization: Right Circular
VSWR: Single Bay <1.2 :1 over 10 Mhz
<1.1 : 1 over 7 Mhz

Azimuth Pattern Circularity: Horizontal component + 1.5 dB on Pole
Input Connection: Sized for your needs, please contact factory

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Electrical Specifications
Options
Installation & Mounting
Typical Patterns

Model 6828 Full-wave Spaced

No. of BayGainMaximum Power RatingTypical power rating 3 1/8" input3<\sup>Typical power rating 6 1/8" input3<\sup>
PowerdbkWkW @ 98 MHzkW @ 98 MHz
10.46-3.402012-
21.01-0.0444024-
31.581.9956036-
42.163.3358045-
52.724.34910045-
63.285.16310045-
84.406.433100-90
105.527.416100-90
126.648.221100-90

***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:
-Radomes
-Null Full
-Beam Tilt
-Custom Mounts

Replacement Parts:
Radome
Bay
Feedline
Standard Mount

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

Installation & Mounting Layout

Model 6828 Antenna Weight & Wind Load

Weight Full-wave Spaced

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical space usedTotal tower space
recommended
Without radomesWith radomesWith radomes &
1/2" (1.2 cm) radial ice
ftmftmftmlbNlbNlbN
12.00.77.52.2927.58.3812053422510013461539
29.02.7416.55.0336.511.03240106845020026923078
318.05.4825.57.7645.513.853601601675300310384617
427.08.2334.510.5254.516.524802135900400313656160
536.010.9643.513.2463.519.3360026691125500417317699
645.013.7252.516.0072.522.0072032031350600520779238
863.019.2070.521.4990.527.49960427018008006276912317
1081.024.6988.526.97108.532.9712005338225010008346115395
1299.030.17106.532.46126.538.4614406405270012010415418477

Windload Full-wave Spaced

No. of BaysWithout radomesWith radomesWith radomes & 1/2" (1.2cm) radial iceWith radomes & 1" (2.5cm) radial iceWith radomes & 2" (5.1cm) radial ice
ft2ft2ft2ft2ft2
EPANEPATEPANEPATEPANEPATEPANEPATEPANEPAT
16.25.810.910.913.013.013.713.714.914.9
212.511.721.721.726.026.027.427.429.929.9
318.717.532.632.634.134.141.041.044.844.8
425.023.443.443.452.152.154.654.659.759.7
531.229.254.354.365.165.168.368.374.774.7
637.535.065.165.178.178.182.082.089.689.6
850.046.786.886.8104.2104.2109.3109.3119.5119.5
1062.558.4108.5108.5130.2130.2136.6136.6149.4149.4
1275.070.1130.2130.2156.3156.3163.9163.9209.9209.9

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

6828 Elevation Patterns Full-wave Spaced
6828-1
6828-2
6828-3
6828-4
6828-5
6828-6
6828-7
6828-8

Special Angle/Elliptical Polarization: Contact factory for elevation patterns

Sample Azimuth Patterns for Shively 6828 FM Antenna
NOTE: Model 6828 is not a directional antenna.

6828 Sample Azimuth Patterns
*Mounted on a 8″ Pole
*Mounted on a Pick-Up-Two Leg on a 36″ Face Tower

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