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The magic eye (also called a cat's eye, or tuning eye in North America) is a specific type of such a tube with a circular display similar to the EM34 illustrated. Its first broad application was as a tuning indicator in radio receivers , to give an indication of the relative strength of the received radio signal, to show when a radio station ...
The Gonsets were among the first commercial radios available for the post-World War II amateur bands and helped popularize VHF for amateurs. [2] The Gonset Communicators were packaged in a square box with a carrying handle and a UHF connector for the antenna on top, making them quite portable. Early models had a magic eye tube tuning indicator ...
EM1 (4678) – Top-view, "Magic Eye"-type tuning indicator, side-contact 8 Base; EM2 – Top-view, "Magic Eye"-type tuning indicator; has a 6.3 V/200 mA heater and was therefore marketed as C/EM2; identical AM2 except for heater ratings; EM4 – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator, EM34 with a side-contact 8 Base
1 – Tube for radio broadcasting and ... EZ-6G5 = 6G5 – Variable-mu "Magic Eye"-type tuning ... the stock number is always of the format 5960-99-000-XXXX where ...
The proliferation of integrated circuits in modern amateur radio equipment has made amateurs nostalgic for vacuum tube-based designs. Radios that contain solid state parts do not require frequent tinkering, whereas vacuum tube radio equipment is less predictable, lending routine radio contacts more excitement, and giving vintage amateur radio ...
Magic Eye tube used for tuning in a 1939 Mission Bell Model 410 radio. (green glow) In 1932, DuMont invented the magic eye tube, or Electron Ray Tube, [14] used as a tuning accessory in radios and as a level meter in mono and stereo home reel-to-reel tape recorders. In the 1930s the manufacture of mechanical panel meters were labor-intensive ...
In 1941, radio tubes continued being sold to radio broadcast stations as R. E. Carlson was vice-president in Charge of Sales during this time. [14] Circa 1948, there was a picture of the Tung-Sol Factory at the corner of High Street and Eighth Avenue by Thomas Pallante located in the Newark Public Library.
Fisher tube equipment is considered quite collectible today. Fisher's first receiver was the model 500, a mono AM/FM receiver using two EL37 output tubes. It had a brass-plated face panel and an optional mahogany or "blonde" wooden case. This early mono receiver should not be confused with the later stereo tube receiver models, the 500B and ...