The agent in the security room repeats this message to those at the debate site, listening on the “Mike” radio frequency.
Don't set the axes of the cores of radio frequency transformers in a line.
The radio device actually is a radio frequency spectroscope.
A radio frequency transformer is shown at B and costs $6 to $7.
radio frequency ra·di·o frequency (rā'dē-ō)
A frequency that lies in the range within which radio waves may be transmitted, from about 10 kilohertz per second to about 300,000 megahertz.
|radio frequency |
A frequency of electromagnetic radiation in the range at which radio signals are transmitted, ranging from approximately 3 kilohertz to 300 gigahertz. Many astronomical bodies, such as pulsars, quasars, and possibly black holes, emit radio frequency radiation.