• Year
  • 1967–1973
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 73383

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

 Technical Specifications

  • Number of Tubes
  • 9
  • Number of Transistors
  • 10
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 5645 kHz
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC) / 120/240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: R-4B - Drake, R.L. Miamisburg, Ohio
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 274 x 140 x 297 mm / 10.8 x 5.5 x 11.7 inch
  • Notes
  • Double conversion - first IF 5645KHz, second IF 50KHz. Can receive 1.5-5MHz+6-30MHz divided in six bands: 1.5-3MHz("1.5-3.0"), 3-5MHz("3.5"), 6-10MHz("7.0"), 10-16MHz("14.0"), 16-23MHz("21.0") and 23-30MHz("28.5"). The HAM-bands covered with the default five crystals are 80, 40, 20, 15 and part of 10 meter (28.5-29MHz). An additional 500 KHz range can be covered per additional crystal. The VFO covers 500KHz with one crystal, AM/CW/SSB, passband-tuning, IF-notch-filter. Optional synthesizer FS-4 for continuous coverage. 52 ohm antenna via RCA connector. Needs external speaker (RCA connector). Matches transmitter T-4XB. Via an INJ RCA connector cable, the T-4XB can use the R-4B frequency synthesizer, so the R-4B crystals (or FS-4) and VFO also controls the T-4XB. (The T-4XB band switch still needs to be changed manually.)
    17 Diodes; 2 ICs.

  • Net weight (2.2 lb = 1 kg)
  • 7.3 kg / 16 lb 1.3 oz (16.079 lb)
  • Price in first year of sale
  • 400.00 $
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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