Author: Bill Harland

Chandler, Indiana – March 25, 2024 – Electronics Research, Inc. will introduce an innovative new FM bandpass filter at the NAB Show in Las Vegas this April. The 940 Series FM Bandpass Filter is a new compact FM bandpass filter from ERI with an innovative form factor and construction to provide the smallest available footprint FM bandpass filter capable of handling 5 kW average power. The filter is a four-section single cabinet design with a footprint less than 18 by 21 inches (497 by 523 millimeters). The filter includes the same field-proven Invar and bellows temperature compensation used in all models of ERI’s medium and high-power FM filter products. The filter contains a cross-coupling standard for additional isolation in combiner systems with closely spaced frequencies.

The filter is rated to handle up to 3 kW (depending on tuning)  at the output after insertion losses, convection cooled, and the rating is increased to 5 kW with a forced air cooling fan. The filter includes 1-5/8-inch unflanged input and output connections, and the EIA flanged version is optionally available. The filter can be used for intermodulation product suppression or configured as an FM channel combiner. A constant impedance configuration, which is also very compact, is also available.

About Electronics Research, Inc.

For 80 years, ERI has served the broadcast industry with products and services of the highest quality and dependability. Our dedicated staff of engineers, designers, fabricators, project managers, and installers deliver products to meet all of your broadcast transmission systems needs, both RF and structural. We take pride in contributing to your success by offering the best broadcast antennas, filters and combiners, transmission lines, and towers.

For more information, contact ERI at +1 (812) 925-6000 or at sales@eriinc.com.

More information is available here.