Super-Size Me: An FM Filter - Radio World

Super-Size Me: An FM Filter

Teracom Components will promote a new, “supersized” FM filter for high-power applications. With dimensions of 900 by 1,620 by 600 mm, this large filter was developed for special applications in India and North America.
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(click thumbnail)Teracom filterTeracom Components will promote a new, “supersized” FM filter for high-power applications. With dimensions of 900 by 1,620 by 600 mm, this large filter was developed for special applications in India and North America.

“While Teracom Components has delivered many similarly sized filters for other applications than FM, this is by far the company’s largest to date for an FM network,” it stated. “The mechanical design includes temperature compensation for improved stability, which is less common with models of this size.”

The filters are being used in two versions of FM combiners for 80 kW and 150 kW, respectively. The combiners have a narrow band input of 40 kW at minimum channel separation of 1.2 MHz, and include a modified 3dB coupler in order to handle 150 kW output power, the supplier stated.

The large and temperature-stabilized cavity of the filter “presents new possibilities for building combiners that can offer channel spacing down to 600 kHz and high power,” it stated. The combiner shipped to India will be used as part of a large expansion of a commercial FM network. The project requires a channel separation of 800 kHz from the same broadcasting antenna.

The company’s Web site is www.teracom-c.com.

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