Wavemeter and Filter 247 (247-W)

• Country
• United States of America (USA)

• Manufacturer / Brand
• General Radio Company; Cambridge (MA)

• Year
• 1923 ??

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 70579

• • alternative name: GenRad

• Picture
• Schematics

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

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Wavemeter and Filter 247 - General Radio Company;

• Dimensions (WHD)
• 8 x 6 x 4 inch / 203 x 152 x 102 mm

• Notes

• Condenser in metal can, coil body made of Bakelite. The Variable Condenser is marked "Wavemeter", its max. capacity 456 µµF. The wavelength is given as 200 to 600 meters.
  There are extension coils avalable for the following ranges:
  247-W2 for 400-1200 meters,
  247-W1/2 for 100-300 meters,
  247-W1/4 for 50-150 meters.
   

• Price in first year of sale
• 10.00 $

• External source of data
• Konrad Birkner

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 241 models, 213 with images and 131 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Radio Company; Cambridge (MA)