• Country
• United States of America (USA)

• Manufacturer / Brand
• Patterson Radio Co. / Electric Co.; Los Angeles, CA

• Year
• 1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 50320

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

• Number of Tubes
• 12

• Valves / Tubes
• 6K7 6A8 6K6 6K7 6E5 6K7 6J7 6C5 6Q7 6V6 6V6 5Y3

• Main principle
• Superhet with RF-stage; ZF/IF 465 kHz; 2 AF stage(s)

• Tuned circuits
• 9 AM circuit(s)

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 110; 220 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 312 [var. 1] - Patterson Radio Co. / Electric

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Notes

• Covers 550 kHz to 18.0 MHz in 4 bands. Tuning eye, BFO. Push-pull audio amplifier.

  Stein "Machine Age to J.Vol.2" and "Cathedral & Tombsone Radios" shows different pictures. Please see Model "312 var. 2".

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 9 = 1938 and before

• Mentioned in
• Rider's 9-4, 9-5, 9-6

• Literature/Schematics (1)
• Machine Age to Jet Age II

• Literature/Schematics (2)
• Cathedral & Tombstone Radios (page 189.)

• Other Models

• Here you find 111 models, 45 with images and 66 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Patterson Radio Co. / Electric Co.; Los Angeles, CA