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.

Chandler, Indiana – March 29, 2023 – At the  2023 NAB Show Centennial in Las Vegas, ERI will introduce a new UHF Television Bandpass Filter with improved insertion loss and a unique forced air cooling system. The UF1500B is rated for 1.5 kW average power at the filter output and is convection cooled. The Model UF5000B adds forced air cooling, increasing the power handling capability to 5.0 kW. The unique targeted forced air-cooling system employed utilizes distributed finned heat sinks with individual cooling fans to target those locations that generate the most heat, based on laboratory testing. The system provides better heat removal using lower volumes of targeted airflow and has the benefits of less ambient noise and lower power consumption than traditional forced air-cooling methods.

The filters have lightweight Aluminum construction and copper resonators, and no finger stock is used. Instead, a mechanical clamping and copper collar firmly hold the resonator at its proper setting. The filter is temperature compensated using an Invar stabilized copper bellows, which is part of the resonator assembly. Multiple cross-couplings are provided to increase the rejection of transmitter out-of-band emissions. Six and eight-pole designs are available for 8-VSB and COFDM applications and are listed below. Input and output connections are unflanged: 1-5/8, 3-1/8, or 4-1/16-inch.

 

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 system needs, both RF and structural. We take pride in contributing to your success by offering the best broadcast antennas, filters and combiners, transmission line, and towers.

For More Information Contact:
Bill Harland
Electronics Research, Inc.
Tel: (812) 925-6000×214
Fax: (812) 925-4030
Email: bharland@eriinc.com
Online: www.eriinc.com

Chandler, Indiana – March 6, 2023 – Electronics Research will show new motorized coaxial RF switches designed for VHF and UHF applications. ERI will also offer a new motorized switch controller. The four models include the 1-5/8-inch Model CS203C switch, the Model CS350C for 3-1/8-inch requirements, the 4-1/16-inch Model CS400C, and the Model CS600C for 6-1/8-inch applications. These coaxial switches are broadband and suitable for applications from 500 kHz to 608 MHz and do not need to be tuned to a specific channel. The coaxial port configuration is a coplanar design that minimizes the elbows required in most installation configurations. The control interface and interlock connections are made with CAT5 or CAT6 cables and RJ45 connectors.

In addition, ERI also has updated the CS250C, CS350C, CS450C, and CS650C VHF (DC to 274 MHz) coaxial switches and the Model CS252C, CS352, and CS452 UHF (any single 6, 7, or 8 MHz TV channel from 470 to 698 MHz) coaxial switches with new drive motor assemblies and control circuitry.

The new EC130 motorized switch controller is designed to control one or two motorized switches and includes an SNMP interface. Adding an optional ERI Model VDM303 RF Power Detector, the EC130 will detect the presence of RF applied to the switch and prevent accidental switch activation while under power. The control interface and interlock connections are made with CAT5 or CAT6 cables with RJ45 connectors.

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

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 line, and towers.

For More Information Contact:
Bill Harland
Electronics Research, Inc.
Tel: (812) 925-6000×000
Fax: (812) 925-4030
Email: bharland@eriinc.com