• Country
• United States of America (USA)

• Manufacturer / Brand
• Barker & Williamson Inc., Bristol (PA)

• Year
• 1947

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 97622

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

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Alternating Current supply (AC) / 105-125 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: 400 Audio Distortion Meter - Barker & Williamson Inc.,

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 13.75 x 9.5 x 7.25 inch / 349 x 241 x 184 mm

• Notes

• For fundamentals from 30 to 15000 cycles (Hz) measuring harmonics to 45000 cycles; as a volt and dB meter from 30 to 45000 cycles. Minimum input for noise and distortion measurement 0.3 volts.  Calibration: distortion measurements ±5dB, voltage measurement ±5% of full scale at 1000 cycles

• Net weight (2.2 lb = 1 kg)
• 11.5 lb (11 lb 8 oz) / 5.221 kg

• Price in first year of sale
• 168.00 $

• Mentioned in
• - - Manufacturers Literature (B&W 400 new product ad in Electronics 11/47 p 222)

• Literature/Schematics (1)
• 1951 Newark catalog Nº 51

• Author
• Model page created by Vitor Oliveira. See "Data change" for further contributors.

• Other Models

• Here you find 12 models, 10 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Barker & Williamson Inc., Bristol (PA)