Antenna Components and Accessories

ERI provides a wide variety of antenna accessory components including adjustable coaxial fine matchers, custom patch panel and switching systems, motorized coaxial switches, coaxial patch panels, manual and motorized waveguide switches, directional couplers, power monitoring and measurement and VSWR overload protection systems and transmission line systems and components.

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FM Adjustable Fine Matchers
ERI’s Adjustable Fine Tuner is one field tuning method that can be used to correct minor impedance mismatches thus reducing the SWR of the transmission system. This process is easily performed after the antenna is mounted on the tower to compensate for existing system disturbances.

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IT Series Isolation Transformers
FM isolation transformers (isocouplers) couple FM or LPTV power across the base insulator of an AM broadcast station transmitting tower, with little or no effect on the AM base impedance and no mismatch into the FM antenna feed line. An isolation transformer (isocoupler) is especially desirable for feeding high impedance AM radiators or towers that are part of a directional array where “bazooka” isolation systems would have adverse effects.

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TSK Series Slug Tuning Kits
TSK Series slug tuning kits for use with FM Antennas.

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SW Series RF Shorting Switches
ERI’s 3-1/8-inch and 6-1/8-inch coaxial safety switches address the requirement of OSHA Regulation 1910.147 which outlines “lock out/tag out” requirement for RF transmission systems to protect workers from accidental exposure or electrical trauma when maintaining towers and antenna systems.

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CS Series VHF and UHF Motorized Coaxial Switches
ERI CS series coaxial motorized switches are designed for operation within FM,VHF, and UHF broadcast systems. The switches are engineered to provide high capability and long life. A Geneva drive mechanism provides exact 90 degree rotation of the contacts. The switches utilize a unique, flat plane, silver plated, dual-contact is designed to provide high power capability and long life.

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CSB Series Broadband Motorized Coaxial Switches
The CS203 (1-5/8 inch), CS300 (3-1/8 inch), CS400 (4-1/16 inch) broad band motorized coaxial switches are designed for any VHF or UHF broadcast application from 54 MHz to 860 MHz. These new motorized switches feature a coplanar design that simplifies requirements for interconnecting transmission line and allows for more compact equipment configurations with fewer expensive elbows. These switches are driven by a precise Geneva Drive mechanism that prevents deterioration of transmission system performance by maintaining precise 90-degree rotation for each activation.

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WS Series Waveguide Switches
ERI WS series Waveguide motorized switches are designed for operation within UHF broadcast systems. The switches are engineered to provide high capability and long life. A Geneva drive mechanism provides exact 90 degree rotation of the contacts.

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