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Collins S-Line, featuring separate power supply, receiver, transmitter, and speaker console, c. 1960s. Amateur radio equipment of past eras like the 1940s, 50s, and 60s that are separate vacuum tube transmitters and receivers (unlike modern transceivers) are an object of nostalgia, and many see rehabilitation and on-air use by enthusiasts. [18 ...
The main disadvantage is normally the power supply available. As normal mains grid power is unavailable, the /P operator may have to resort to batteries, portable generators, solar panels. [3] and wind turbines. Operating amateur radio at sea is known as 'maritime mobile', as is signified by the suffix '/MM' on the call.
A dummy load is a device used to simulate an electrical load, usually for testing purposes.In radio a dummy antenna is connected to the output of a radio transmitter and electrically simulates an antenna, to allow the transmitter to be adjusted and tested without radiating radio waves.
So-called "All American Five" vacuum tube radio receivers used a power supply that could work on either AC or DC. An AC/DC receiver design is a style of power supply of vacuum tube radio or television receivers that eliminated the bulky and expensive mains transformer. A side-effect of the design was that the receiver could in principle operate ...
A linear amplifier is an electronic circuit whose output is proportional to its input, but capable of delivering more power into a load. The term usually refers to a type of radio-frequency (RF) power amplifier, some of which have output power measured in kilowatts, and are used in amateur radio.
World Radio Laboratories, WRL, was a major supplier of amateur radio equipment from the 1950s to the 1970s. WRL was located in Council Bluffs, Iowa , USA, and run by Leo Meyerson, amateur callsign W0GFQ, and his family.
The TNCs of the 1980s and 1990s were complete solutions that only needed a radio and an optional dumb terminal. As home computers made their way into ham "shacks," there was a movement toward simpler, cheaper "KISS" (Keep It Simple, Stupid) devices. These have a modem and minimal processing of the AX.25 protocol.
Amateur radio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communications. [1]