• Year
  • 1969 ?
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 73730

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

 Technical Specifications

  • Number of Transistors
  • 28
  • Semiconductors
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 5645/50 kHz
  • Wave bands
  • Broadcast, Long Wave and more than two Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 120/220 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Power out
  • 3 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: SPR-4 - Drake, R.L. Miamisburg, Ohio
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 10.75 x 5.5 x 12.25 inch / 273 x 140 x 311 mm
  • Notes
  • Double conversion, AM/CW/LSB/USB, preselector, notch filter.
    Continuous coverage with optional FS-4 frequency synthesizer.

    Accessories, internal:

    1. SCC-4 Crystal Calibrator

    2. 5-NB Noise Blanker

    3. RY-4 Radio Teletype Adaptor

    4. TA-4 Transceive Adaptor

    Frequency Coverage:

    Crystal tuned, each tuning a 500 kHz band. Factory supplied with 10 crystals, covering most broadcast bands. Adding optional 13 crystals provides 150 kHz - 30 MHz coverage.

  • Net weight (2.2 lb = 1 kg)
  • 8.2 kg / 18 lb 1 oz (18.062 lb)
  • Price in first year of sale
  • 2'280.00 DM
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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