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6842 Broadband FM Antenna

Model: 6842

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

-Economical – perfect for medium to high power omni stations
-Pressurization is Required!
-Fully Broadband and ready for multiple frequencies
-Easy install and assembly on site

Performance Specifications:
Polarization: Elliptically Polarized
VSWR: Under 1.3 :1 or better

Azimuth Pattern : Horizontal component + 1.5 dB on Pole
Input Connection: 7/8″ EIA for 1 bay, 1-5/8″ EIA female for 2 bays and 3-1/8″ EIA for 3-8 bays

SKU: 6842

Description

Model: 6842

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

-Economical – perfect for medium to high power omni stations
-Pressurization is Required!
-Fully Broadband and ready for multiple frequencies
-Easy install and assembly on site

Performance Specifications:
Polarization: Elliptically Polarized
VSWR: Under 1.3 :1 or better

Azimuth Pattern : Horizontal component + 1.5 dB on Pole
Input Connection: 7/8″ EIA for 1 bay, 1-5/8″ EIA female for 2 bays and 3-1/8″ EIA for 3-8 bays

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Electrical Specifications
Options
Installation & Mounting
Typical Patterns

6842 Full-wave Spaced (98″  bay to bay spacing)

No. of LevelsGainPower Rating
PowerdbkW
10.45-3.4217.5
20.994-0.02715
31.511.79722.5
42.023.04430
52.524.0137.5
63.024.80645
84.046.06860

6842 Half-wave Spaced (60″  bay to bay spacing)

No. of LevelsGainPower Rating
PowerdBkW
2.858-0.6615
31.2430.9422.5
41.6442.1630
52.0373.0937.5
62.4323.8645
83.2235.0860

***Our gain figures are calculated by factoring the directivity to allow for losses in the radiating system.  Due to this conservation 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 is computed for 98 MHz and will vary across the band.

Options:
-Full and ½ Wave
-3-1/8″ Stub Tuner, Fine Matching
-Deicers
-Dual Setting Thermostat (Install Sheet)

 

 

Replacement Parts:
Power divider
Cables
Bay
3 Stub Tuner Fine Matching Transformer 3-1/8″ (p/n 99952-G501)
Dual Setting Thermostat Assembly (p/n 55522-G502)
Automatic Control Unit for Deicers (p/n 94068-G50X)

 

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

Mounts to fit: 3″ OD to 5-1/4″ OD (76-133 mm) out-rigged pole (supplied by customer).

6842 Installation Manual

Dual Setting Thermostat Install Sheet

Model 6842 Antenna Weight & Wind Load

Weight Full-wave Spaced

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical space usedTotal tower space
recommended		Without iceWith
1/2" (1.2 cm) radial ice		With
1" (2.5 cm) radial ice		With
2" (5.1 cm) radial ice
ftmftmftmlbNlbNlbNlbN
13.51.0710.03.0520.06.105122776338112498215956
211.63.5318.25.5328.28.60157698231102733815036522900
319.86.0326.38.036.311.02189703461539536238410994888
427.48.5034.510.544.513.627412194441975695309111415075
536.111.042.713.052.716.134215215882615956425220599158
644.313.550.815.560.818.54001779694308711335039245010898
860.618.567.220.577.223.55392397993441716807473375016880

Windload Full-wave Spaced

No. of BaysWithout iceWith 1/2" (1.2 cm) radial iceWith 1" (2.5 cm) radial iceWith 2" (5.1 cm) radial ice
EPANEPATEPANEPATEPANEPATEPANEPAT
ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2
12.80.261.10.103.60.331.60.154.40.412.20.206.20.583.60.33
28.20.744.80.4411.81.097.80.7215.41.4310.91.0121.72.0116.51.53
314.41.339.30.8621.72.0115.71.4529.02.6822.22.0643.93.9835.93.32
419.01.7612.31.1428.82.6720.81.9338.53.5629.52.7358.25.3947.64.41
527.62.5619.21.7843.24.0033.23.0758.75.4347.54.4090.38.3677.07.13
632.93.0522.92.1251.54.7739.53.6670.16.4956.65.241089.9891.98.51
851.14.7337.83.5082.17.6066.26.1311310.595.28.8117616.315514.3

6842_overview.jpg

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.
2. Windload and weight tabulations assume full-wave bay spacing and include the bay, mounts, power divider and interbay cabling.
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

6842 Elevation Patterns Full-wave Spaced
6842-1
6842-2
6842-3
6842-4
6842-5
6842-6
6842-8

Special Angle/Elliptical Polarization: Contact factory for elevation patterns

Sample Azimuth Patterns for Shively 6842 FM Antenna
NOTE: Model 6842 is not a directional antenna.

6842 Sample Azimuth Patterns

SKU: 6842 CATEGORY: TAGS: