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The R-390A military shortwave radio receiver was the result of a project undertaken by the United States Army Signal Corps in 1954 to replace the existing R-390 receiver then in use. The R-390 had done its job so well that the Corps decided continued use of this type of receiver necessitated an improved, reduced-cost version.
Modern portable shortwave radio receiver with digital frequency display and keypad for direct frequency entry. A shortwave radio receiver is a radio receiver that can receive one or more shortwave bands, between 1.6 and 30 MHz. A shortwave radio receiver often receives other broadcast bands, such as FM radio, Longwave and Mediumwave.
This is a list of rack-mount or tabletop communications receivers that include short wave frequencies. This list does not include handheld, portable or consumer grade equipment. Those that include VHF or UHF can be termed wideband receivers, whereas those without HF would be termed scanners, or surveillance receivers.
Collins_speaker,_75S-3C_receiver_and_32S-3_transmitter.jpg (784 × 600 pixels, file size: 311 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The Collins mechanical filter was introduced to consumers in the 75A-3, and the 75A-4 was one of the first receivers marketed specifically as a single sideband receiver. Collins R-390A radio receiver. Around 1950, Collins began designing the R-390 (500 kHz — 30 MHz) for the US military. This was intended to be a receiver of the highest ...
Take a look at every state ranked by how much each parent is going to spend on each kid this holiday season.
Modern communications receiver, ICOM RC-9500 Communications receiver or shortwave receiver - a general purpose audio receiver covering the LF, MF, shortwave , and VHF bands. Used mostly with a separate shortwave transmitter for two-way voice communication in communication stations, amateur radio stations, and for shortwave listening.
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