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The diagram (right) shows one of the most common single tube reflex circuits from the early 1920s. It functioned as a TRF receiver with one stage of RF and one stage of audio amplification. The radio frequency (RF) signal from the antenna passes through the bandpass filter C 1 , L 1 , L 2 , C 2 and is applied to the grid of the directly heated ...
RE-784A Tube Location Diagram. The 784 series uses a total of six tubes, 5 of which are "miniature". The only "full-size" tube is the 17EW8, which is used to drive the AM/FM receiver circuit. 17EW8: VHF Double [Triode] 12BE6: Heptode Pentagrid; 12BA6 (two) Pentode: used for RF amplification; 12AV6: Duplex-diodes
A picture of The Toot-a-Loop Radio or Panasonic R-72. 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.
Volksempfänger VE301 - The distinctive Bakelite cabinet was designed by the architect and industrial designer Walter Maria Kersting.. The Volksempfänger (German: [ˈfɔlks.ɛmˌpfɛŋɐ], “people’s receiver”) was a range of low-cost radio receivers produced in Nazi Germany, developed by engineer Otto Griessing at the request of Joseph Goebbels, the Reich Minister of Propaganda.
BC-342 radio receiver. The BC-342 was a World War II U.S. Army Signal Corps high frequency radio receiver.It was used primarily as part of field installations such as the SCR-188A, but could be used with mobile sets such as the 2 1/2 ton mounted SCR-399.
GU-50 produced in 1977 at the Ulianovsk factory. The GU-50 (Russian: ГУ-50) is a power pentode vacuum tube intended for 50 watt operation as a linear RF amplifier on frequencies up to 120 MHz.
R-311 Omega, Radiomuseum.org This page was last edited on 1 February 2024, at 20:47 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 ...
Homemade two tube radio from 1958 1930s style homemade one-tube regenerative radio. The idea of radio as entertainment took off in 1920, with the opening of the first stations established specifically for broadcast to the public such as KDKA in Pittsburgh and WWJ in Detroit.