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A foxhole radio is a simple crystal sets radio receiver cobbled together from whatever parts one could make (which were very few indeed) or scrounged from junked equipment. Such a set typically used salvaged domestic wiring for an antenna, a double-edged safety-razor blade and pencil lead (or bent safety-pin) for a detector, and a tin can ...
Spark Museum Light Bulbs Spark Museum AC DC Exhibit. The museum began in 1985 as an informal collection of radio sets, spare parts, schematics, recordings, and vintage magazines and manuals owned by a Bellingham resident, Jonathan Winter [1] Winter's collection continued to grow, and by 1998, the Bellingham Antique Radio Museum was officially established, with the more than 800 radio sets from ...
Vintage equipment in the Queen Mary radio room. Some hobbyists see vintage radio operation as a valuable asset to help preserve the history and heritage of radio for future generations. [3] They sometimes assist in the restoration and operation of vintage radio equipment for historical exhibits, museums, and historic ships or aircraft. [6]
The radio signal consisted of brief pulses of radio waves, repeating tens or at most a few hundreds of times per second, separated by comparatively long intervals of no output. [ 17 ] : p.352-353, 355–358 The power radiated was dependent on how much electric charge could be stored in the antenna before each spark, which was proportional to ...
Swan merged with Cubic Corporation in 1967, and Johnson managed Swan as its subsidiary until 1973. Johnson founded Atlas Radio in 1974. Atlas produced smaller solid state radios for mobile communications from vehicles of all types. [3] Many Swan radios remain in service today, restored and operated by vintage amateur radio enthusiasts. [2]
The Toot-a-Loop Radio or Panasonic R-72 was a novelty radio made by Panasonic Japan in the early 1970s. This radio was designed to be wrapped around the wrist. It also came with stickers for customizing the unit. Reception was the AM broadcast band only - no FM (the FM version of this radio is called RF-72). The radio was shaped something like ...
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The Kolster Radio Corporation was an electronics manufacturer and distributor [1] based in Newark, New Jersey, which went bankrupt in January 1930. [2] It bore the name of its chief research engineer, Frederick A. Kolster .