ERI offers complete lines of broadcast transmission line including Rigid coaxial line, coaxial cable, elliptical waveguide, circular waveguide, and rectangular waveguide.
Rigid Coaxial LineMACXLine rigid coaxial line with bellows is available from ERI in sizes from 3 1/8 inch through 8 3/16 inch. ERI also offers STDLine for interior and short run applications. 1329Line is an aluminum outer conductor rigid line product that uses MACXLine inner conductors and is an economical alternative to traditional copper/brass rigid line.
Circular WaveguideGUIDELine® circular waveguide is the best choice for long vertical runs. It has substantially lower wind loads than equivalent rectangular waveguide, allowing it to be used on towers where rectangular cannot. With attenuation up to 50% lower than corresponding rectangular waveguide, it is the most effecient transmission line available. You may be able to use a smaller, less-expensive transmitter! Unlike truncated elliptical waveguid, on-site tuning is completly eliminated by the use of cross-polarization canceling pins.
Rectangular WaveguideFor transmitter room applications, inexpensive thin wall rectangular waveguide is a good choice. Pressurizable thick wall rectangular waveguide connects the base of the vertical run to the transmitter building. ERI manufactures a complete line WR1150, WR1500, and WR1800 components, including E-plane and H-plane elbows, miters, and fine matchers.
Components and AccessoriesERI provides a broad range of products include RF components (either coaxial and waveguide) for combiners, hybrids, diplexers, directional couplers, motorized switches, RF loads, and much more. With the ability to call on decades of previous system designs and configurations and the significant internal engineering and manufacturing expertise ERI can quickly respond to requirements whether they be broadcast, military, or scientific applications.