ROTOTILLER. Circularly Polarized FM Antenna. Benefits. Characteristics

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Estella Farmer
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Benefits Low VSWR, superior VSWR band width, and minimal weather related VSWR problems Fully pressurized, internal feed and welded feed connections High input power capacity Modular construction

for less than 1/2-inch; however radomes or deicing heaters are available ERI antennas are unchallenged in quality and dependability.

The result is a simple and reliable method of coupling power to the elements.

All ERI antennas include brackets for mounting on leg, pole, or face mounting (up to 42-inch uniform cross section tower); brackets for other mounting configurations are optionally available.

connections, rugged brass material and TIG welding. The ROTOTILLER FM antenna s unique design consists of two series fed, bent dipole elements which form a space phased, circularly polarized radiator.

1 Benefits Low VSWR, superior VSWR band width, and minimal weather related VSWR problems Fully pressurized, internal feed and welded feed connections High input power capacity Modular construction facilitates easy installation and repair Rugged brass construction and stainless steel support brackets and hardware Corrosion resistant construction Radomes or deicing heaters not normally required for less than 1/2-inch; however radomes or deicing heaters are available ERI antennas are unchallenged in quality and dependability. ERI is the only manufacturer to use large diameter outer conductors and a completely enclosed, pressurized, internal series feed system. The result is a simple and reliable method of coupling power to the elements. Unlike competing designs, ERI series fed antennas do not require a troublesome secondary current loop for element excitation with all the resulting disadvantages. All ERI antennas include brackets for mounting on leg, pole, or face mounting (up to 42-inch uniform cross section tower); brackets for other mounting configurations are optionally available. ERI s original and distinctive design combines the exceptional engineering features of an internally fed, fully pressurized system with superior fabrication characterized by totally welded feed connections, rugged brass material and TIG welding. The ROTOTILLER FM antenna s unique design consists of two series fed, bent dipole elements which form a space phased, circularly polarized radiator. The antenna s configuration and the large diameter of the radiating elements contribute to the excellent bandwidth of the antenna system, and also inhibits corona discharge. The horizontally polarized horizontal plane azimuth pattern of the SHPX series antenna is omnidirectional within ±2 db when the antenna is pole or LAMBDA Optimized Mounting System mounted atop a tower. Side mounting the antenna on a typical tower structure will affect the azimuth pattern. ERI offers a pattern measurement service to assist in determining the effect of the mounting structure on the antenna s pattern. Using ERI s pattern optimization service, the pattern s circularity may be improved through the addition of parasitically excited elements. Characteristics Product Line Product Series Frequency Range Polarization Azimuth Axial Ratio VSWR at Input ROTOTILLER Classic Series MHz, Single frequency or multiplexed versions Circular (Clockwise) ± 2 db in free space Less than 3 db in free space 1.07:1 or less (with field matching) 1.25:1 or less (with top pole or LAMBDA Mounting System) 1.50:1 or less (top mounted without field matching)

2 SHP Model - Super High Power Electrical Specifications Number of Bays Power Gain db Gain Input Type Feed Configuration Input Power Rating Bay to Bay Spacing SHP-1AE /8 inch 50 Ohm Female End 32.0 Full Wave SHP-1BE /8 inch 50 Ohm Female End 40.0 Full Wave SHP-2AE /8 inch 50 Ohm Female End 32.0 Full Wave SHP-2AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-2BE /8 inch 50 Ohm Female End 56.0 Full Wave SHP-2AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-2BC /8 inch 50 Ohm Female Center 80.0 Full Wave SHP-2CE /8 inch 50 Ohm Female End 80.0 Full Wave SHP-3AE /8 inch 50 Ohm Female End 32.0 Full Wave SHP-3AC /8 inch 50 Ohm Female Off Center 39.0 Full Wave SHP-3BE /8 inch 50 Ohm Female End 56.0 Full Wave SHP-3AC /8 inch 50 Ohm Female Off Center 64.0 Full Wave SHP-3BC /8 inch 50 Ohm Female Center Full Wave SHP-4AE /8 inch 50 Ohm Female End 32.0 Full Wave SHP-4AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-4BE /8 inch 50 Ohm Female End 56.0 Full Wave SHP-4AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-4BC /8 inch 50 Ohm Female Center Full Wave SHP-4CE /8 inch 50 Ohm Female End Full Wave SHP-5AE /8 inch 50 Ohm Female End 32.0 Full Wave SHP-5AC /8 inch 50 Ohm Female Off Center 39.0 Full Wave SHP-5BE /8 inch 50 Ohm Female End 56.0 Full Wave SHP-5AC /8 inch 50 Ohm Female Off Center 64.0 Full Wave SHP-5BC /8 inch 50 Ohm Female Center Full Wave SHP-6AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-6AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-6BC /8 inch 50 Ohm Female Center Full Wave SHP-6CE /8 inch 50 Ohm Female End Full Wave SHP-7AC /8 inch 50 Ohm Female Off Center 39.0 Full Wave SHP-7AC /8 inch 50 Ohm Female Off Center 64.0 Full Wave SHP-7BC /8 inch 50 Ohm Female Off Center Full Wave SHP-8AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-8AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-8BC /8 inch 50 Ohm Female Center Full Wave SHP-9AC /8 inch 50 Ohm Female Off Center 39.0 Full Wave SHP-9AC /8 inch 50 Ohm Female Off Center 64.0 Full Wave SHP-9BC /8 inch 50 Ohm Female Off Center Full Wave SHP-10AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-10AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-10BC /8 inch 50 Ohm Female Center Full Wave SHP-11AC /8 inch 50 Ohm Female Off Center 39.0 Full Wave SHP-11AC /8 inch 50 Ohm Female Off Center 64.0 Full Wave SHP-11BC /8 inch 50 Ohm Female Off Center Full Wave SHP-12AC /8 inch 50 Ohm Female Center 39.0 Full Wave SHP-12AC /8 inch 50 Ohm Female Center 64.0 Full Wave SHP-12BC /8 inch 50 Ohm Female Center Full Wave kw

3 SHP Model - Super High Power Electrical Specifications Number of Bays Power Gain db Gain Input Type Feed Configuration Input Power Rating Bay to Bay Spacing SHP-2AE-HW /8 inch 50 Ohm Female End 32.0 Half Wave SHP-2AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-2BE-HW /8 inch 50 Ohm Female End 56.0 Half Wave SHP-2AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-2BC-HW /8 inch 50 Ohm Female Center 80.0 Half Wave SHP-2CE-HW /8 inch 50 Ohm Female End 80.0 Half Wave SHP-3AE-HW /8 inch 50 Ohm Female End 32.0 Half Wave SHP-3AC-HW /8 inch 50 Ohm Female Off Center 39.0 Half Wave SHP-3BE-HW /8 inch 50 Ohm Female End 56.0 Half Wave SHP-3AC6-HW /8 inch 50 Ohm Female Off Center 64.0 Half Wave SHP-3BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-4AE-HW /8 inch 50 Ohm Female End 32.0 Half Wave SHP-4AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-4BE-HW /8 inch 50 Ohm Female End 56.0 Half Wave SHP-4AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-4BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-4CE-HW /8 inch 50 Ohm Female End Half Wave SHP-5AE-HW /8 inch 50 Ohm Female End 32.0 Half Wave SHP-5AC-HW /8 inch 50 Ohm Female Off Center 39.0 Half Wave SHP-5BE-HW /8 inch 50 Ohm Female End 56.0 Half Wave SHP-5AC6-HW /8 inch 50 Ohm Female Off Center 64.0 Half Wave SHP-5BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-6AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-6AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-6BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-6CE-HW /8 inch 50 Ohm Female End Half Wave SHP-7AC-HW /8 inch 50 Ohm Female Off Center 39.0 Half Wave SHP-7AC6-HW /8 inch 50 Ohm Female Off Center 64.0 Half Wave SHP-7BC-HW /8 inch 50 Ohm Female Off Center Half Wave SHP-8AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-8AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-8BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-9AC-HW /8 inch 50 Ohm Female Off Center 39.0 Half Wave SHP-9AC6-HW /8 inch 50 Ohm Female Off Center 64.0 Half Wave SHP-9BC-HW /8 inch 50 Ohm Female Off Center Half Wave SHP-10AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-10AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-10BC-HW /8 inch 50 Ohm Female Center Half Wave SHP-11AC-HW /8 inch 50 Ohm Female Off Center 39.0 Half Wave SHP-11AC6-HW /8 inch 50 Ohm Female Off Center 64.0 Half Wave SHP-11BCHW /8 inch 50 Ohm Female Off Center Half Wave SHP-12AC-HW /8 inch 50 Ohm Female Center 39.0 Half Wave SHP-12AC6-HW /8 inch 50 Ohm Female Center 64.0 Half Wave SHP-12BC-HW /8 inch 50 Ohm Female Center Half Wave kw

4 MP Model - Medium Power Electrical Specifications Number of Bays Power Gain db Gain Input Type Feed Configuration Input Power Rating Bay to Bay Spacing MP-1E /8 inch 50 Ohm Female End 12.0 Full Wave MP-2E /8 inch 50 Ohm Female End 18.0 Full Wave MP-2C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-3E /8 inch 50 Ohm Female End 18.0 Full Wave MP-3C /8 inch 50 Ohm Female Off Center 18.0 Full Wave MP-4E /8 inch 50 Ohm Female End 18.0 Full Wave MP-4C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-5E /8 inch 50 Ohm Female End 18.0 Full Wave MP-5C /8 inch 50 Ohm Female Off Center 18.0 Full Wave MP-6C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-7C /8 inch 50 Ohm Female Off Center 18.0 Full Wave MP-8C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-9C /8 inch 50 Ohm Female Off Center 18.0 Full Wave MP-10C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-11C /8 inch 50 Ohm Female Off Center 18.0 Full Wave MP-12C /8 inch 50 Ohm Female Center 18.0 Full Wave MP-2E-HW /8 inch 50 Ohm Female End 18.0 Half Wave MP-2C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave MP-3E-HW /8 inch 50 Ohm Female End 18.0 Half Wave MP-3C-HW /8 inch 50 Ohm Female Off Center 18.0 Half Wave MP-4E-HW /8 inch 50 Ohm Female End 18.0 Half Wave MP-4C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave MP-5E-HW /8 inch 50 Ohm Female End 18.0 Half Wave MP-5C-HW /8 inch 50 Ohm Female Off Center 18.0 Half Wave MP-6C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave MP-7C-HW /8 inch 50 Ohm Female Off Center 18.0 Half Wave MP-8C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave MP-9C-HW /8 inch 50 Ohm Female Off Center 18.0 Half Wave MP-10C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave MP-11C-HW /8 inch 50 Ohm Female Off Center 18.0 Half Wave MP-12C-HW /8 inch 50 Ohm Female Center 18.0 Half Wave kw

5 LP Model - Low Power Electrical Specifications Number of Bays Power Gain db Gain Input Type Feed Configuration Input Power Rating Bay to Bay Spacing LP-1E /8 inch 50 Ohm Female End 9.0 Full Wave LP-2E /8 inch 50 Ohm Female End 9.0 Full Wave LP-2C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-3E /8 inch 50 Ohm Female End 9.0 Full Wave LP-3C /8 inch 50 Ohm Female Off Center 12.0 Full Wave LP-4E /8 inch 50 Ohm Female End 9.0 Full Wave LP-4C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-5E /8 inch 50 Ohm Female End 9.0 Full Wave LP-5C /8 inch 50 Ohm Female Off Center 12.0 Full Wave LP-6C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-7C /8 inch 50 Ohm Female Off Center 12.0 Full Wave LP-8C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-9C /8 inch 50 Ohm Female Off Center 12.0 Full Wave LP-10C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-11C /8 inch 50 Ohm Female Off Center 12.0 Full Wave LP-12C /8 inch 50 Ohm Female Center 12.0 Full Wave LP-2E-HW /8 inch 50 Ohm Female End 9.0 Half Wave LP-2C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave LP-3E-HW /8 inch 50 Ohm Female End 9.0 Half Wave LP-3C-HW /8 inch 50 Ohm Female Off Center 12.0 Half Wave LP-4E-HW /8 inch 50 Ohm Female End 9.0 Half Wave LP-4C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave LP-5E-HW /8 inch 50 Ohm Female End 9.0 Half Wave LP-5C-HW /8 inch 50 Ohm Female Off Center 12.0 Half Wave LP-6C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave LP-7C-HW /8 inch 50 Ohm Female Off Center 12.0 Half Wave LP-8C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave LP-9C-HW /8 inch 50 Ohm Female Off Center 12.0 Half Wave LP-10C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave LP-11C-HW /8 inch 50 Ohm Female Off Center 12.0 Half Wave LP-12C-HW /8 inch 50 Ohm Female Center 12.0 Half Wave kw

6 SHP Model - Super High Power Mechanical Specifications & ½ in. Weight & radome, radome, ½ in. & ½ in. C a A a with radome, radome, & ½ in. lbm kg lbm kg lbm kg lbm kg ft 2 m 2 ft 2 m 2 ft 2 m 2 ft 2 m 2 SHP-1AE SHP-1BE SHP-2AE SHP-2AC SHP-2BE SHP-2AC SHP-2BC SHP-2CE SHP-3AE SHP-3AC SHP-3BE SHP-3AC SHP-3BC SHP-4AE SHP-4AC SHP-4BE SHP-4AC SHP-4BC SHP-4CE SHP-5AE SHP-5AC SHP-5BE SHP-5AC SHP-5BC SHP-6AC SHP-6AC SHP-6BC SHP-6CE SHP-7AC SHP-7AC SHP-7BC SHP-8AC SHP-8AC SHP-8BC SHP-9AC SHP-9AC SHP-9BC SHP-10AC SHP-10AC SHP-10BC SHP-11AC SHP-11AC SHP-11BC SHP-12AC SHP-12AC SHP-12BC Notes: (1) weight and wind load are approximate values for a typical structure assuming no top load. Final design loads will vary for specific projects and should be verified by an ERI representative. (2) Wind loads are calculated in accordance with the ANSI/TIA/EIA 222-F standard. Weight and effective wind area (CaAc) includes antenna, inner transmission feed and typical support mast and mounting brackets with no ice.

7 SHP Model - Super High Power Mechanical Specifications & ½ in. Weight & radome, radome, ½ in. & ½ in. C a A a with radome, radome, & ½ in. lbm kg lbm kg lbm kg lbm kg ft 2 m 2 ft 2 m 2 ft 2 m 2 ft 2 m 2 SHP-2AE-HW SHP-2AC-HW SHP-2BE-HW SHP-2AC6-HW SHP-2BC-HW SHP-2CE-HW SHP-3AE-HW SHP-3AC-HW SHP-3BE-HW SHP-3AC6-HW SHP-3BC-HW SHP-4AE-HW SHP-4AC-HW SHP-4BE-HW SHP-4AC6-HW SHP-4BC-HW SHP-4CE-HW SHP-5AE-HW SHP-5AC-HW SHP-5BE-HW SHP-5AC6-HW SHP-5BC-HW SHP-6AC-HW SHP-6AC6-HW SHP-6BC-HW SHP-6CE-HW SHP-7AC-HW SHP-7AC6-HW SHP-7BC-HW SHP-8AC-HW SHP-8AC6-HW SHP-8BC-HW SHP-9AC-HW SHP-9AC6-HW SHP-9BC-HW SHP-10AC-HW SHP-10AC6-HW SHP-10BC-HW SHP-11AC-HW SHP-11AC6-HW SHP-11BCHW SHP-12AC-HW SHP-12AC6-HW SHP-12BC-HW Notes: (1) weight and wind load are approximate values for a typical structure assuming no top load. Final design loads will vary for specific projects and should be verified by an ERI representative. (2) Wind loads are calculated in accordance with the ANSI/TIA/EIA 222-F standard. Weight and effective wind area (CaAc) includes antenna, inner transmission feed and typical support mast and mounting brackets with no ice.

8 MP Model - Medium Power Mechanical Specifications & ½ in. Weight & radome, radome, ½ in. & ½ in. C a A a with radome, radome, & ½ in. lbm kg lbm kg lbm kg lbm kg ft 2 m 2 ft 2 m 2 ft 2 m 2 ft 2 m 2 MP-1E MP-2C MP-2E MP-3C MP-3E MP-4C MP-4E MP-5C MP-5E MP-6C MP-7C MP-8C MP-9C MP-10C MP-11C MP-12C MP-2C-HW MP-2E-HW MP-3C-HW MP-3E-HW MP-4C-HW MP-4E-HW MP-5C-HW MP-5E-HW MP-6C-HW MP-7C-HW MP-8C-HW MP-9C-HW MP-10C-HW MP-11C-HW MP-12C-HW Notes: (1) weight and wind load are approximate values for a typical structure assuming no top load. Final design loads will vary for specific projects and should be verified by an ERI representative. (2) Wind loads are calculated in accordance with the ANSI/TIA/EIA 222-F standard. Weight and effective wind area (CaAc) includes antenna, inner transmission feed and typical support mast and mounting brackets with no ice.

9 LP Model - Low Power Mechanical Specifications & ½ in. Weight & radome, radome, ½ in. & ½ in. C a A a with radome, radome, & ½ in. lbm kg lbm kg lbm kg lbm kg ft 2 m 2 ft 2 m 2 ft 2 m 2 ft 2 m 2 LP-1E LP-2C LP-2E LP-3C LP-3E LP-4C LP-4E LP-5C LP-5E LP-6C LP-7C LP-8C LP-9C LP-10C LP-11C LP-12C LP-2C-HW LP-2E-HW LP-3C-HW LP-3E-HW LP-4C-HW LP-4E-HW LP-5C-HW LP-5E-HW LP-6C-HW LP-7C-HW LP-8C-HW LP-9C-HW LP-10C-HW LP-11C-HW LP-12C-HW Notes: (1) weight and wind load are approximate values for a typical structure assuming no top load. Final design loads will vary for specific projects and should be verified by an ERI representative. (2) Wind loads are calculated in accordance with the ANSI/TIA/EIA 222-F standard. Weight and effective wind area (C a A c ) includes antenna, inner transmission feed and typical support mast and mounting brackets with no ice.

10 Mounting Notes ROTOTILLER The base price of ERI FM antennas include brackets for mounting on a tower leg or pole, up to 15-inches in diameter, or for face mounting on a uniform cross section tower section up to 42-inch face. Optional, standard fiberglass and steel anti-rotation brackets are available for uniform cross section tower faces up to 42-inches, center to center. For uniform tower faces greater than 42-inches steel anti-rotation brackets are generally used. Fiberglass anti-rotation brackets for face sizes larger than 42-inches may be available as a special order item. Please contact ERI with those requirements. Standard FM antenna mounting brackets and anti-rotation brackets assume that the tower face is unobstructed. If conduits, transmission lines, or other appurtenances are mounted on the tower face(s) they could interfere with standard bracket designs and may require an optional, extra cost, brackets to accommodate the obstruction. Contact ERI with details for further information. Brackets for mounting on tapered tower legs are available at additional cost. Contact ERI with tower details. Anti-rotation brackets (one per bay) required for leg mounting if leg O.D. is: LPX, LP, 300, and 350 Series s - 2-inches (51 mm) leg size or less SHPX, SHP, SHP-H, MPX, and MP Series s - 3-inches (76 mm) leg size or less Radomed s - 5-inches (127 mm) leg size or less Utilize the ERI Advantage Combine an ERI antenna with an ERI Mounting Structure, Pattern Measurement and Installation. Assure yourself of the best antenna/tower interaction. ERI s Pattern Measurement service will provide the crucial answers concerning the relationship between the antenna mounting orientation and antenna pattern. ERI Mounting Sections are designed to achieve optimum antenna performance while reducing weight and wind loads. Only ERI can offer you an antenna/tower/installation package that will achieve your highest expectations in a demanding FM market. Contact Electronics Research for complete electrical and mechanical specifications.

11 Ordering Information Definition a - b c d e - f - g - h a Model: SHP, LP, MP b Number of Bays c Interbay Line Size: A = 3 1/8 inch, B = 4 1/8 inch, C = 6 1/8 inch d Input Feed Configuration: E = End Fed, C = Center fed for even number of bays, off center fed for odd number of bays e RF Input Size: Blank = 3 1/8 inch, 6 = 6 1/8 inch f Design Note 1: Blank = Omnidirectional, DA = Directional Azimuth Pattern g Design Note 2: Blank = Full wave length bay to bay spacing, HW = Half wave length bay to bay spacing h Design Note 3: Blank = Standard product, SP = Special Design Example: SHP-4AC-DA-HW Description: ERI Model SHP ROTOTILLER FM, four bay, 4 1/8 inch interbay line, center fed, directional azimuth pattern, half wave length bay to bay spacing. Options* Anti-rotation brackets Quarter wave stub Beam tilt (center fed antennas only) First null fill (center fed antennas only) Second null fill (center fed antennas only); Second null fill not available for LP antennas Beam tilt and first null fill (center fed antennas only) Radomes Deicers (600w/220v) Stem heaters (300w/220v) Export packing * Options available at additional cost.

Around the World, Across the Spectrum, Your Single Source For Broadcast Solutions s Transmission Line Towers Filters/Combiners Broadcast Services About Electronics Research, Inc.

Our dedicated staff of engineers, designers, fabricators, and project managers take pride in contributing to your success by providing AM, FM, VHF, UHF, BRS-EBS, and Mobile Media broadcast systems

In addition to manufacturing the full range of broadcast system components and installation accessories, ERI offers a suite of engineering and field services needed to plan, install, optimize, and

Broadcast Systems ROTOTILLER FM LYNX Dual Input for FM-IBOC 1105 100A Series Low Power FM Low Power Horizontally Polarized Educational FM P300/P350 Series Vertically Polarized FM 1180 and 1090 Series

Emergency UHF Television ALP Low and Medium Power UHF Television AL PLUS Low and Medium Power UHF Television AL Series Low Power UHF Television HMD BRS-EBS SHADOWMASTER Shadow-Filling BRS-EBS

12 Around the World, Across the Spectrum, Your Single Source For Broadcast Solutions s Transmission Line Towers Filters/Combiners Broadcast Services About Electronics Research, Inc. Founded in 1943, Electronics Research, Inc. delivers high quality, innovative, integrated solutions to broadcasters across the U.S. and around the world. Our dedicated staff of engineers, designers, fabricators, and project managers take pride in contributing to your success by providing AM, FM, VHF, UHF, BRS-EBS, and Mobile Media broadcast systems including the industry s best antenna, transmission line, filter/combiner, and tower and structural support systems. In addition to manufacturing the full range of broadcast system components and installation accessories, ERI offers a suite of engineering and field services needed to plan, install, optimize, and maintain your broadcast facility. We are your single source for broadcast solutions. Broadcast Systems ROTOTILLER FM LYNX Dual Input for FM-IBOC A Series Low Power FM Low Power Horizontally Polarized Educational FM P300/P350 Series Vertically Polarized FM 1180 and 1090 Series Broadband Panel FM Radio SLIMWING Batwing VHF Television CRUCIS Crossed Dipole VHF Television STINGRAY Broadband Television Panel TRASAR High Power Traveling Wave Television AGW Quick-Deploy Emergency UHF Television ALP Low and Medium Power UHF Television AL PLUS Low and Medium Power UHF Television AL Series Low Power UHF Television HMD BRS-EBS SHADOWMASTER Shadow-Filling BRS-EBS Transmission Line Systems MACXLine Rigid Transmission Line with Bellows HELIAX Air- and Foam-dielectric Coaxial Cable HELIAX Standard Elliptical Waveguide GUIDELine Circular Waveguide Standard Rectangular Waveguide Dehydrators and Pressurization Equipment Filter and Combining Systems FM Radio Filter and Combining Systems UHF and VHF Television Filter and Combining Systems DAB Filter and Combining Systems Mobile Media Filter and Combining Systems RF Components System Monitoring and Protection Components Structural Support Systems Guyed Towers Self-Supporting Towers Roof-top Support Structures Specialty Structures and Custom Supports RF and Structural System Services RF Field and Engineering Services Installation and Structural Engineering Services Electronics Research, Inc Gardner Road Chandler, Indiana USA 877 ERI-LINE (toll-free: North America) (web) (international) (fax) All designs, specifications, and availabilities of products and services presented in this publication are subject to change without notice.

P300/P350 Series. Vertically Polarized FM Antenna. Features. Characteristics

P300/P350 Series. Vertically Polarized FM Antenna. Features. Characteristics Vertically Polarized FM Features Low VSWR, superior VSWR band width, minimal weather related VSWR problems Fully pressurized, internal feed, welded feed connections, series fed radiating elements High