• Country
• United States of America (USA)

• Manufacturer / Brand
• Fansteel Products (Pfanstiehl, Pfansteihl, Balkite, Balkeit); Chicago

• Year
• 1926

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 50415

• • alternative name: Balkeit || First National
  • Brand: Overtone

• Number of Tubes
• 6

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 0.32 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Overtone 20 - Fansteel Products Pfanstiehl,

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 517 x 257 x 327 mm / 20.4 x 10.1 x 12.9 inch

• Notes
• "Single-tuned Six". One dial (primary tuning control knob). Lighted one-dial tuning is calibrated in Meters. Three side-by-side tuning capacitors, mechanically linked.
  Balkeit, Balkite, Pfanstiehl are put together to Fansteel.

• Net weight (2.2 lb = 1 kg)
• 9.1 kg / 20 lb 0.7 oz (20.044 lb)

• Price in first year of sale
• 125.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition

• Literature/Schematics (1)
• Radio Manufacturers of the 1920's, Vol. 2

• Other Models

• Here you find 131 models, 74 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fansteel Products (Pfanstiehl, Pfansteihl, Balkite, Balkeit); Chicago