Search results
Results from the WOW.Com Content Network
This 1920s TRF radio manufactured by Signal is constructed on a breadboard Tuning a TRF receiver, like this 5 tube Neutrodyne set from 1924 with two stages of RF amplification, was a complicated process. The three tuned circuits, controlled by the 3 large knobs, had to be tuned in unison to the new station.
Chrysler and Philco announced an all-transistor car radio in the April 28, 1955, edition of the Wall Street Journal. [1] This Philco car radio model was the first tubeless auto set in history to be developed and produced. [2] It was a $150 option for 1956 Chrysler and Imperial cars and hit the showroom floor on October 21, 1955. [3] [4] [5]
The Neutrodyne radio receiver, invented in 1922 by Louis Hazeltine, was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized" [1] [2] to prevent parasitic oscillations which caused "squealing" or "howling" noises in the speakers of early radio sets.
Collins S-Line, featuring separate power supply, receiver, transmitter, and speaker console, c. 1960s. Amateur radio equipment of past eras like the 1940s, 50s, and 60s that are separate vacuum tube transmitters and receivers (unlike modern transceivers) are an object of nostalgia, and many see rehabilitation and on-air use by enthusiasts. [18 ...
The “Fédération Internationale des Véhicules Anciens” was founded in 1966, when several historic vehicle associations and classic car clubs in a number of different countries felt a need for a worldwide body to promote and direct the interests of a historic vehicle movement internationally.
British Antique Dealers' Association Logo 2020. The British Antique Dealers' Association (BADA) was founded in London, 1918.It is Britain's leading trade association for art and antique dealers and its members are carefully vetted and selected for their experience and professional integrity, as well as the quality and craftsmanship of their stock.
CINOA (Confédération Internationale des Négociants en Oeuvres d'Art, or International Confederation of Art and Antique Dealers' Associations) is a Brussels-based international federation, founded in 1935, of antique and art dealers, representing five thousand dealers from thirty-two art and antique associations in twenty-two countries.
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 triode , V 1 .