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Smaller in size than "boat anchors", "glowbug" is a term used by US amateurs to describe a simple home-made tube-type radio set. The majority of glowbug transmitters are designed to be used in the CW radiotelegraphy mode. [21] Glowbug transmitters having simple, tube-based designs were part of many beginner ham stations.
Specimen's line of tube amplifiers use 1940s-era tube circuitry, yet is compatible with an iPod or computer. The product line includes a single-ended stereo amp, 300B stereo tube amp, single-ended monoblock, a single-ended 2A3 tube amp, a pentode-driven 2A3 amp, and the Octoblock (an eight channel single ended power amp created for the ...
Lafayette also offered TV vacuum tube testing, for customers who wanted to service their own televisions. Lafayette was quick to jump on industry trends, first by embracing open reel tape recorders, and later, 8-track cartridge recorders and compact cassette recorders, [ 6 ] along with an array of gimmicks, supplies, and accessories. [ 5 ]
Herbert G. Johnson, W6QKI, founded Swan Engineering. Johnson built the first ten largely vacuum tube type design single sideband (SSB) transceivers in a garage in Benson, Arizona, in 1960-1961. The more expensive Collins KWM-2 was the only other competing transceiver at the time. The operation moved to Oceanside, California, where, at one point ...
Yorkville Sound is a Canadian manufacturer of audio amplifiers (including the Traynor amplifier line), loudspeakers and related professional sound reinforcement equipment. [ 1 ] [ 2 ] Based in Pickering, Ontario , Canada , the firm has a global presence as an importer and exporter of audio electronic products.
Homebrew is an amateur radio slang term for home-built, noncommercial radio equipment. [1] Design and construction of equipment from first principles is valued by amateur radio hobbyists, known as "hams", for educational value, and to allow experimentation and development of techniques or levels of performance not readily available as commercial products.
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A valve RF amplifier (UK and Aus.) or tube amplifier is a device for electrically amplifying the power of an electrical radio frequency signal. Low to medium power valve amplifiers for frequencies below the microwaves were largely replaced by solid state amplifiers during the 1960s and 1970s, initially for receivers and low power stages of ...