R 408

Redifon Ltd.; London

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  • Year
  • 1968 ?
  • Category
  • Commercial Receiver (may include amateur bands)
  • Radiomuseum.org ID
  • 108862

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 80 kHz; none
  • Wave bands
  • Broadcast, Long Wave and more than two Short Wave bands.
  • Power type and voltage
  • Line / Storage batteries (perhaps also batteries) / DC: 24; 110; 220 or 50-60 Hz: 100-125; 200-250 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 cm = 3.1 inch
  • Power out
  • 1.4 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: R 408 - Redifon Ltd.; London
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Dimensions (WHD)
  • 420 x 220 x 500 mm / 16.5 x 8.7 x 19.7 inch
  • Notes

  • Communications receiver for maritime use, coverage 13 - 28000 kHz, AM, CW, USB/LSB;

    Single conversion below 650 kHz, depending on frequency, first IF is 470 kHz, 1.5 Mhz or 4.5 Mhz, second IF 80 kHz. Internal crystal calibrator, analogue film tuning scale.

    This receiver was also used in in ship wireless stations equipped by German maritime telecommunications company Hagenuk as Receiver Hagenuk E 408R.

    Designed for telephony, telegraphy, or facsimile reception. It can work point-to-point, fixed or mobile stations.

    Bandwidth variable from 800 Hz to 8 kHz in AM and CW, or from 800 Hz to 4 kHz in SSB. When operating in CW a 160 Hz bandwidth can be switched in via a crystal filter.

    The standard model is for 50/60 Hz 100 to 125 or 200 to 250 V. Special models for 24, 110 or 220 V DC.

  • Net weight (2.2 lb = 1 kg)
  • 25.5 kg / 56 lb 2.7 oz (56.167 lb)
  • Mentioned in
  • -- Original-techn. papers.
  • Literature/Schematics (1)
  • -- Original-techn. papers. (Electronic Engineering, volume 37 year 1965)
  • Author
  • Model page created by Lars-G. Lundelin. See "Data change" for further contributors.

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