Museum Artifact: Thordarson Amplifying Transformer, c. 1920s Made By: Thordarson Electric Manufacturing Co., 500 W. Huron St., Chicago, IL [River North] “The Thordarson factory is more than an assembly plant. All phases of transformer manufacturing, engineering, core and case stamping, coil winding, impregnating, enameling, assembly, and testing are done under one roof. . . . It has grown from a small one-man shop to a place of leadership in the field—the largest organization in the world...| Made-in-Chicago Museum
Museum Artifacts: Super-Triumph Tube Radio (1951, pictured above), Model 4R Long Distance Receiver/Amplifier (1923), Model 808 Tombstone Radio (1934), Model 6D-2620 Radio (1942), Colsol-Tone H511 (1951), Royal 500 Transistor Radio (1960), Model F508V Radio (1964), Spirit of ’76 Television (1976) Made By: Zenith Radio Corporation, 6001 W. Dickens Ave., Chicago, IL [Galewood] “You’ve had your last tussle with howling radio static once you tune in this terrific performer. The post Zenith R...| Made-in-Chicago Museum
A dual-band transceiver with a crisp receiver and a clean SSB signal is described. It started its life as an investigation of the excellent S7C receiver described in EMRFD. This transceiver was specifically designed to use components that are easily available in TV and Radio spares shops. The receiver sports an above average dynamic range, […]| VU2ESE