75S-3A

Collins Radio Company; Cedar Rapids (IA)

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  • Year
  • 1962/1963
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 172441

 Technical Specifications

  • Number of Tubes
  • 12
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 2955-3155/455 kHz
  • Wave bands
  • Short Wave (SW only)
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 1.8 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 75S-3A - Collins Radio Company; Cedar
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 14.75 x 7.75 x 12.5 inch / 375 x 197 x 318 mm
  • Notes
  • Collins 75S-3A Shortwave Receiver: covers 80 - 10 m amateur bands in 14 ranges (3,4-3,6 / 3,6-3,8 / 3,8-4 / 7,0-7,2 / 7,2-7,4 / 14,0-14,2 7 14,2-14,4 / 14,8-15 / 21,0-21,2 / 21,2-21,4 / 21,4-21,6 / 28,5-28,7 MHz) plus 14 additional 200 kHz segments; AM / USB/LSB / CW. IF bandwidths (-6/-60 dB) AM 4,5/25 / SSB 2,1/4,2 / CW 0,2/1,25 kHz; Passband tuning, Notch filter (rejection tuning), crystal calibrator.
    Optional 312-B3 speaker, optional 312-B4 station control with speaker, phone patch and directional Watt - meter.
    Osterman and Moore have 6U8A (triode/pentode) as V3 and V4 instead of 6EA8.
    Rare variant (around 400 sets made) of the 75S-3 with additional shortwave band coverage corresponding to needs of commercial / governmental users.
    These sets can be recognized by a small knob above the band range switch and a white coloured background of the band range switch indicator.
  • Net weight (2.2 lb = 1 kg)
  • 20 lb (20 lb 0 oz) / 9.080 kg
  • Source of data
  • - - Manufacturers Literature
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

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