Instead he turned to a field that was being largely ignored, that of medium frequency ( hectometre ) radio signals in the 0.5 3 MHz range, around the AM broadcast bands.
22.
It operates the civilian network of marine VHF radio, medium frequency and Navtex transmitters and five coast radio stations : Tj�me Radio, Rogaland Radio, Flor?Radio, Bod?Radio and Vard?Radio.
23.
Shortwave radio received its name because the wavelengths in this band are shorter than 200 m ( 1500 kHz ) which marked the original upper limit of the medium frequency band first used for radio communications.
24.
NARBA's provisions were largely supplanted in 1983, with the adoption of the Regional Agreement for the Medium Frequency Broadcasting Service in Region 2 ( Rio Agreement ), which covered the entire Western hemisphere.
25.
The 1881 Census for Ireland is unavailable but figures derived from telephone directories suggest that Cree is of " Medium Frequency " in Northern Ireland and " Rare " in the Republic of Ireland.
26.
The United States Coast Guard has ceased all use of Morse code on the radio, and no longer monitors any radio frequencies for Morse code transmissions, including the international medium frequency ( MF ) distress frequency of 500 kHz.
27.
Edgar Allen's purchased Jessop's, relocating Jessop's special alloy ( medium frequency ) melting on Edgar's Sheffield Road site and the 3-ton electric furnace at their Imperial Steel Works melting shop.
28.
In addition, the Coast Guard maintains a chain of high frequency ( HF ) and medium frequency ( MF ) radio stations that provide communications in the Atlantic and Pacific oceans, the Gulf of Mexico, and the Caribbean Sea.
29.
At the medium frequencies ( 1 4 kHz ) the slope increases as intensity increases, but at the low frequencies there is no clear inclination with level and the filters at high center frequencies show a small decrease in slope with increasing level.
30.
The vessel may also have a Russian SSN-137 Variable Depth Sonar ( VDS ) with NATO reporting name Steer Hide, providing active search with medium frequency, and the sonar might be license produced in India with Indian designation SSSN-113.
