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A New Three-Bay ERI LPX Series FM Antenna in Final Tuning and Test

A new three-bay LPX Series ROTOTILLER® FM Antenna has been tuned and is now under a pressure test to confirm the assembly does not leak air. After the test, the antenna will be painted and packed for shipment to the customer. The LPX-3E end-fed array is rated to handle up to 9 kW, and it is available with radomes or electrical deicers for installations in harsh Winter climates.

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ERI Introduces New UHF Television Bandpass Filters Rated for 1500 and 5000 Watts

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

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ERI Introduces New Motorized Coaxial Switches and Switch Controller

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

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NECRAT.US features WEOW (FM) and WAIL (FM) serves Key West with an ERI 12-Bay ROTOTILLER®

 

An ERI twelve-bay diplexed ROTOTILLER® FM antenna transmits WEOW (FM) and WAIL (FM), both Class C1 FMs with a 100 kW ERP. The antenna has a branch feed system to improve the system bandwidth. The 12-bay array combines two six-bay center-fed arrays into a single input. The antenna is designed so co-owned WCNK (FM), 98.7 MHz, and WWUS (FM), 104.1 MHz, could also operate from this antenna. The FM channel combiner feeding the antenna is an FM junction combiner consisting of two ERI 783 FM bandpass filters. The tower was also designed and manufactured by ERI. It is a 57-inch face 600-foot structure manufactured and installed by ERI in 2012. Photo courtesy of Mike Fitzpatrick. More great photos found here.

 

 

 

 

 

 

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Starting final tuning and assembly for a new six (6) station constant impedance FM channel combiner

Starting final tuning and assembly for a new six (6) station constant impedance FM channel combiner

The cavities, resonators, and transmission line components for a new six (6) station constant impedance FM channel combiner are complete. They are now in ERI’s Filter Lab for setup, tuning, and final assembly. The system should be done, and the final test and performance data will be taken by the end of the month. The eight-bay AXIOM® Master FM Antenna will be ready for final tuning soon.