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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.
Each store had a repair shop on site with a part-time technician. Some locations had multiple full-time service technicians. Others had service departments that operated independently of the store but under the same ownership. Stores ranged in size from 2,000 to 5,000 square feet (460 m 2).
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.
Boulder Amplifiers is a private corporation founded in Boulder, Colorado in 1983 by Jeff Nelson as a manufacturer of high-end, solid state professional audio electronics. The early, primary technology used to distinguish Boulder from other audio manufacturers was the use of the 990 discrete gain stage, based on the original work of Deane Jensen .
The transceiver's predecessor was the TS-520, which began production a year earlier. The TS-820S was the second of three hybrid (including vacuum tubes and semiconductors) models produced by Kenwood during the 1970s and 1980s, [32] and was noted for its quality. Its functionality and new hybrid technology made it one of the most popular ...
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 ...