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6812 Antenna Series

Models: 6812B, 6812C and 6812DIN

Designed for low power applications, this light weight, low windload antenna is perfect fit for many installations. We manufacture this system in the USA with stainless steel construction for durability.

– Economical- perfect for translators, campus and religious broadcasters
– True Circular Polarization
– No Pressurization Needed
– Designed for Easy Mounting

Performance Specifications:
Polarization: Right Circular
VSWR: 1.1:1 ± 100 kHz 1.2:1 + 200 kHz
Azimuth Pattern Circularity: Horizontal component ± 1.5 dB on Pole
Input Connection: Type “N” female standard for 6812 B&C and DIN for 6812DIN

SKU: 6812

Description

Models: 6812B, 6812C and 6812DIN

Designed for low power applications, this light weight, low windload antenna is perfect fit for many installations. We manufacture this system in the USA with stainless steel construction for durability.

– Economical- perfect for translators, campus and religious broadcasters
– True Circular Polarization
– No Pressurization Needed
– Designed for Easy Mounting

Performance Specifications:
Polarization: Right Circular
VSWR: 1.1:1 ± 100 kHz 1.2:1 + 200 kHz
Azimuth Pattern Circularity: Horizontal component ± 1.5 dB on Pole
Input Connection: Type “N” female standard for 6812 B&C and DIN for 6812DIN

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Electrical Specifications
Options
Installation & Mounting
Typical Patterns
Downloads

B and C Models, Full-wave Spaced

No. of BaysGainPower Rating
PowerdbW
1 bay0.46-3.391000
2 bay 1.010.031500
3 bay1.561.921500
4 bay2.093.211500
5 bay2.634.201500
6 bay3.164.991500
8 bay4.236.261500

B and C Models, Half-wave Spaced

No. of BaysGainPower Rating
PowerdbW
2 bay0.71-1.511000
3 bay1.020.081500
4 bay1.321.191500
5 bay1.622.11500
6 bay1.922.841500
8 bay2.544.041500

DIN Full-wave Spaced

No. of BaysGainPower Rating
PowerdbW
1 bay0.46-3.392000
2 bay1.010.032500
3 bay1.561.922000
4 bay2.093.212500
5 bay2.634.202000
6 bay3.164.992500
8 bay4.236.262500

DIN Half-wave Spaced

No. of BaysGainPower Rating
PowerdbW
20.71-1.512000
31.020.082500
41.321.192500
51.622.12500
61.922.842500
82.544.042500

***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:
-6812B – mounts on an offset pole
-6812C – can mount directly to tower up to 24″ face width
-6812DIN – Higher Power 2kW, mounts to offset pole
-Full, ½ Wave and Custom Spacing Available
-H/V Ratios
-Null Fill
-Beam Tilt
-Radomes (link to tech sheet)
-Deicers (link to tech sheet)
-Dual Setting Thermostat (link to tech sheet)
-Automatic Control Unit for Deicer (link to tech sheet)
-Double Sub Tuner (link to stub tuner instruction sheet)
-Fine Matching Transformer (link to tech sheet)

Replacement Parts:
Radome
Harness

No Factory personal needed for installation.

Installation Manuals:
– 6812B English
– 6812
– 6812DIN

Must be mounted on a metal pipe 2” IPS (2-3/8”, 60mm) to 3” IPS (3-1/2”, 89mm) outside diameter. Pipe not supplied by Shively; requires 5’, 1.5m of clear space on pipe above and below antenna.

Installation & Mounting Layout {6602_6812_installation.pdf}

Weight & Wind Load

Model 6812B & 6812DIN Antenna size & weight (full-wave-spaced)

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical Space UsedTotal Tower Space RecommendedWithout radomesWith radomesWith radomes & 1/2" (1.2 cm) radial ice
ftmftmftmlbNlbNlbN
10.00.015.04.615.04.662731138148658
29.32.819.35.929.38.91253622763181414
318.65.728.68.738.611.81984944184882170
428.08.538.011.648.014.6251111255566582925
537.211.347.314.457.317.5321421576988283681
646.614.256.617.366.620.3381691888369984437
856.817.366.820.476.823.451227251111613385949

Model 6812B & 6812DIN Antenna windload (full-wave-spaced)

No. of BaysRevision "G", 90 mphRevision "G", 40 mph
Without RadomesWith RadomesWith Radomes & 1 1/2" (3.8 cm) radial ice
EPANEPATEPANEPATEPANEPATEPANEPAT
ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2
10.50.00.70.13.60.33.50.34.50.44.20.4
21.00.11.80.27.60.77.30.711.61.110.91.0
31.50.12.90.311.71.111.11.018.71.717.71.6
42.00.24.00.415.71.515.01.425.82.424.42.3
52.50.25.10.519.71.818.81.732.83.031.22.9
63.00.36.20.623.72.222.62.139.93.737.93.5
84.10.48.40.831.72.930.32.854.15.051.44.8

Model 6812B & 6812DIN Antenna size & weight (half-wave-spaced)

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical Space UsedTotal Tower Space RecommendedWithout radomesWith radomesWith radomes & 1/2" (1.2 cm) radial ice
ftmftmftmlbNlbNlbN
24.81.514.84.524.87.61253622763181414
39.72.919.76.029.79.01984944184882170
414.54.424.57.534.510.5251111255566582925
519.35.929.38.939.312.0321421576988283681
624.27.434.210.444.213.5381691888369984437
833.810.343.813.453.816.451227251111613385949

Model 6812B & 6812DIN Antenna windload (half-wave-spaced)

No. of BaysRevision "G", 90 mphRevision "G", 40 mph
Without RadomesWith RadomesWith Radomes & 1 1/2" (3.8 cm) radial ice
EPANEPATEPANEPATEPANEPATEPANEPAT
ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2
21.00.11.80.27.60.77.30.711.61.110.91.0
31.50.12.90.311.71.111.11.018.71.717.71.6
42.00.24.00.415.71.515.01.425.82.424.42.3
52.50.25.10.519.71.818.81.732.83.031.22.9
63.00.36.20.623.72.222.62.139.93.737.93.5
84.10.48.40.831.72.930.32.854.15.051.44.8

Model 6812C Antenna size & weight (full-wave-spaced)

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical Space UsedTotal Tower Space RecommendedWithout radomesWith radomesWith radomes & 1/2" (1.2 cm) radial ice
ftmftmftmlbNlbNlbN
10.00.015.04.615.04.683637164174774
24.81.514.84.524.87.61776683023641618
39.72.919.76.029.79.0261161004455542463
414.54.424.57.534.510.5351561315827443308
519.35.929.38.939.312.0441961637259334148
624.27.434.210.444.213.55323619486311234993
833.810.343.813.453.816.470311257114315036682

Model 6812C Antenna windload (full-wave-spaced)

No. of BaysRevision "G", 90 mph (145 kph)Revision "G", 40 mph (64 kph)
Without RadomesWith RadomesWith Radomes & 1 1/2" (3.8 cm) radial ice
EPANEPATEPANEPATEPANEPATEPANEPAT
ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2
10.70.10.70.13.40.32.40.24.80.43.40.3
21.60.11.70.26.70.65.20.59.70.99.30.9
32.60.22.70.310.10.980.714.61.415.21.4
43.50.33.70.313.41.210.81.019.51.821.12.0
54.50.44.80.416.81.613.61.324.32.327.02.5
65.40.55.80.520.21.916.41.529.22.732.93.1
87.30.77.90.726.92.521.92.039.03.644.64.1

Model 6812C Antenna size & weight (half-wave-spaced)

No. of BaysVertical Tower SpaceWeight
Antenna Radiation AperturePhysical Space UsedTotal Tower Space RecommendedWithout radomesWith radomesWith radomes & 1/2" (1.2 cm) radial ice
ftmftmftmlbNlbNlbN
24.81.514.84.524.87.61776683023641618
39.72.919.76.029.79.0261161004455542463
414.54.424.57.534.510.5351561315827443308
519.35.929.38.939.312.0441961637259334148
624.27.434.210.444.213.55323619486311234993
833.810.343.813.453.816.470311257114315036682

Model 6812C Antenna windload (half-wave-spaced)

No. of BaysRevision "G", 90 mph (145 kph)Revision "G", 40 mph (64 kph)
Without RadomesWith RadomesWith Radomes & 1 1/2" (3.8 cm) radial ice
EPANEPATEPANEPATEPANEPATEPANEPAT
ft2m2ft2m2ft2m2ft2m2ft2m2ft2m2
21.60.11.70.26.70.65.20.59.70.99.30.9
32.60.22.70.310.10.980.714.61.415.21.4
43.50.33.70.313.41.210.81.019.51.821.12.0
54.50.44.80.416.81.613.61.324.32.327.02.5
65.40.55.80.520.21.916.41.529.22.732.93.1
87.30.77.90.726.92.521.92.039.03.644.64.1

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.
5. Deicers add approximately 1 lb (4.4 N) per bay in weight and a windload of EPA(N) = 0.7 ft2 and EPA(T) = 0.7 ft2 per bay.

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

6812 Elevation Patterns Full-wave Spaced
6812-1
6812-2{6812-fw-2.pdff}
6812-3
6812-4
6812-5
6812-6

6812 Elevation Patterns Half-wave Spaced
6812-2
6812-4
6812-6{6812-hw-6.pdf}

Special Angle/Elliptical Polarization: Contact factory for elevation patterns

Sample Azimuth Patterns for Shively Series 6812 FM Antenna
NOTE: Model 6812 is not a directional antenna.

6812B Sample Azimuth Patterns
*Mounted on a 2″ pipe
*Mounted on a pole off an 18″ tower face
*Mounted on a pole off an 24″ tower face
*Mounted on a pole off an 36″ tower face

6812C Sample Azimuth Patterns
*Mounted on tower leg of a 24″ tower face

Downloads

ts-6602_6812_installation

ts-6812-r_bay_replacement

SKU: 6812 CATEGORY: TAGS: