SPR-4

• Country
• United States of America (USA)

• Manufacturer / Brand
• Drake, R.L. Miamisburg, Ohio

• Year
• 1969 ?

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 73730

• Picture
• Schematics

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

• 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

• Source of data
• Shortwave Receivers - Past & Present (3rd ed.)

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 154 models, 99 with images and 61 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Drake, R.L. Miamisburg, Ohio