The two main American radic-sondes in use at the present time operate on carrier frequencies of 400 and 1, 685 Mc./sec. Audio-frequency modulation is controlled by varying the grid resistor of a blocking oscillator and lies within the range 3-200 c. ... can be in the form of a rotating single-turn helix (German, Indian ), flat spiral (Canadian), or radius arm (French and Swiss). ... Manual aerial control enables matching of elevation and azimuth signals on a cathode-ray tube, the appropriateanbsp;...
Title | : | The Meteorological Magazine |
Author | : | |
Publisher | : | - 1955 |
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