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2. Family Radio Service - Wikipedia

   en.wikipedia.org/wiki/Family_Radio_Service

   Motorola T5320 FRS handheld radio. The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band.

3. Inductive output tube - Wikipedia

   en.wikipedia.org/wiki/Inductive_output_tube

   The inductive output tube (IOT) or klystrode is a variety of linear-beam vacuum tube, similar to a klystron, used as a power amplifier for high frequency radio waves. It evolved in the 1980s to meet increasing efficiency requirements for high-power RF amplifiers in radio transmitters. [ 1 ]

4. MFJ Enterprises - Wikipedia

   en.wikipedia.org/wiki/MFJ_Enterprises

   MFJ Enterprises was an American manufacturer specializing in a wide range of products for the amateur radio market. The company focuses on station accessories, including antenna tuners and antenna switching equipment. MFJ was founded in 1972 by Martin F. Jue. As of 2014, the company was recognized as the largest producer of amateur radio ...

5. Klystron - Wikipedia

   en.wikipedia.org/wiki/Klystron

   The simplest klystron tube is the two-cavity klystron. In this tube there are two microwave cavity resonators, the "catcher" and the "buncher". When used as an amplifier, the weak microwave signal to be amplified is applied to the buncher cavity through a coaxial cable or waveguide, and the amplified signal is extracted from the catcher cavity.

6. Ultra high frequency - Wikipedia

   en.wikipedia.org/wiki/Ultra_high_frequency

   Ultra high frequency (UHF) is the ITU designation [1] for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).

7. Personal radio service - Wikipedia

   en.wikipedia.org/wiki/Personal_radio_service

   Two frequency bands available: VHF-FM (142–143 MHz VHF CB) and UHF-FM (476–477 MHz UHF CB). Indonesia allows 40 channels from 476.425 MHz to 477.400 MHz at 25 kHz channel spacing. It is the same channel plan as the original 40 channel Australia/New Zealand UHF CB allocation. Indonesia also has a 60-channel VHF-FM service available from 142. ...