medium frequency


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medium frequency

[′mē·dē·əm ′frē·kwən·sē]
(communications)
A Federal Communications Commission designation for the band from 300 to 3000 kilohertz in the radio spectrum. Abbreviated mf.

medium frequency

The portion of the band of frequencies of electromagnetic radiation that lies between 300 kHz and 3 MHz. These, along with low frequencies, are used mainly for nondirectional beacons (NDB). The aeronautical allocation for NDBs covers a part of both bands from 200 kHz to 420 kHz.

medium frequency

An electromagnetic wave that oscillates in the range from 300,000 to 3,000,000 Hz. See spectrum.
References in periodicals archive ?
Tweens & Early Teens are the most important age group in the market, containing the highest proportion of Heavy frequency users and the second-highest proportion of Medium frequency users.
While a major increase in charge material cost is evident with the medium frequency furnace's requirement for smaller and cleaner scrap, the elimination of electrodes required by the EAF offsets this higher charge cost.
Tweens & Early Teens record the highest consumption of Chilled Soup, with 12% of this age group recording Heavy frequency consumption, 16% recording Medium frequency consumption, and 26% recording Light frequency consumption.
Electric Furnace Melt Center-This system consists of three medium frequency coreless induction furnaces.
While each gender records similar numbers of Heavy and Light frequency consumers, 21% of women consume these products at a Medium frequency compared to only 14% of men.
top cap of its three 20-metric-ton, medium frequency coreless induction furnaces, The separation in the refractory layers was allowing iron to reach the coils, and on occasion forcing Deere to shut down its mold lines.
Furthermore, 11% of females are Heavy frequency consumers compared to9% of males, and 20% of females are Medium frequency users compared to 18% of males.
In his paper "A Comparative Analysis for the Cost and Operational Differences Between Equivalent Cupola and Medium Frequency Electric Furnace Melt Center Designs" (02-142), M.
ABB displayed its Smart FS medium frequency induction furnace for small to medium-size iron, steel and nonferrous melting.
The foundry installed a melt deck consisting of two 8000-lb capacity medium frequency induction furnaces across the middle of the new plant, leaving room for both scrap collection and a future molding line expansion.
Auburn Foundry Plant 2 melts Class 30 gray iron in three 10-ton coreless induction furnaces with 7000 kW medium frequency power supplies.
In addition to examining each of the elements and technologies that make up today's induction melting "state-of-the-art," he provided an overview of the melt shop at John Deere Waterloo Works, which replaced six 16-ton arc furnaces with three coreless furnaces, making it the largest medium frequency induction melting installation worldwide.

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