Dynamic Noise Filter DNF1201

Burwen Laboratories Inc.; Lexington (MA)

  • Year
  • 1972
  • Category
  • Miscellaneous (Other, Various) - see notes
  • Radiomuseum.org ID
  • 99139

 Technical Specifications

  • Number of Transistors
  • 4
  • Semiconductors
  • Main principle
  • something special ? Please give information (notes)
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / (110) 220 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Dynamic Noise Filter DNF1201 - Burwen Laboratories Inc.;
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 290 x 95 x 220 mm / 11.4 x 3.7 x 8.7 inch
  • Notes
  • 2-channel dynamic noise filter for audio signals. Two setups including one for records with 78 RPM. Bandwidth controller with sliding low-pass cut-off frequency from 27kHz down to 600Hz, depending of signal-amplitude and -frequency. Circuit uses 16 op-amp stages plus the transistors. Originally developed to compete the Dolby NR system. The successor of this model (but without the setup for '78') is the DNF1201A by KLH.
  • Net weight (2.2 lb = 1 kg)
  • 3.4 kg / 7 lb 7.8 oz (7.489 lb)
  • Source of data
  • - - Data from my own collection
  • Mentioned in
  • - - Data from my own collection
  • Author
  • Model page created by Georg Richter. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Dynamic Noise Filter is part of the collections of the following members.

 Forum