S-7404-7

Firestone Tire & Rubber Co. (Air Chief & Roamer, Airchief); Akron (OH)

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  • Year
  • 1941 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 40761

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 11
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: S-7404-7 - Firestone Tire & Rubber Co.
  • Shape
  • Console with Push Buttons.
  • Dimensions (WHD)
  • 34 x 37.5 x 15.5 inch / 864 x 953 x 394 mm
  • Notes
  • The Firestone S-7404-7 is a large multiband console. Band coverage: BC, 1.65-5.5 MHz, 5.5-18 MHz, and 9.2-10 MHz (31 m "bandspread"). Six pushbuttons set by a pair of variable capacitors for each. Switchable selectivity to tradeoff selectivity vs. high frequency audio response. Rotatable shielded loop antenna, with mechanical cable linkage to knob on front panel. Speaker has fixed stiff paper dispersion cone attached to front of magnet pole piece in center of cone (appearance similar to "whizzer cone," but does not move with main cone). Built in loop antenna.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 12 = ca. 1941 and before
  • Literature/Schematics (1)
  • Riders 12-15, 16

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