• Country
• United States of America (USA)

• Manufacturer / Brand
• Watterson Radio Mfg. Co., Dallas, TX

• Year
• 1940 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 314515

• Number of Tubes
• 6

• Valves / Tubes
• 6A8G 6U7G 75 6P5G 6AC5G 80

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 - 120 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5 inch = 12.7 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Airmaster AC-641 - Watterson Radio Mfg. Co.,

• Shape
• Tablemodel, slant panel.

• Dimensions (WHD)
• 18.5 x 13 x 9 inch / 470 x 330 x 229 mm

• Notes

• Schematic appears to be identical or very similar to the Watterson L-611.

• Net weight (2.2 lb = 1 kg)
• 15 lb (15 lb 0 oz) / 6.810 kg

• Author
• Model page created by Larry Smith. See "Data change" for further contributors.

• Other Models

• Here you find 61 models, 31 with images and 45 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Watterson Radio Mfg. Co., Dallas, TX