• Country
• United States of America (USA)

• Manufacturer / Brand
• Collins Radio Company; Cedar Rapids (IA)

• Year
• 1955–1959

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

• Radiomuseum.org ID
• 68951

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

• Number of Tubes
• 21

• Valves / Tubes
• 6BA6 6DC6 6BA7 12AT7 6BA7 6BA6 12AX7 6BA6 6BA6 6AL5 12AU7 6AL5 12AT7 6BA6 6BA6 6AL5 5Y3GT 0A2 6AL5 6BA6 6BA6 6AQ5

• Main principle
• Superhet, double/triple conversion; ZF/IF 2500-1500/455 kHz

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Alternating Current supply (AC) / 105 - 125 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 0.75 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: 75A-4 - Collins Radio Company; Cedar

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 17.25 x 10.5 x 15.5 inch / 438 x 267 x 394 mm

• Notes

• Collins 75A-4 Amateur - Band Receiver: Double conversion, AM,CW, SSB, NB-FM optional, eight amateur bands from 160 - 10 meters (1,5-2,5 / 3,2-4,2 / 6,8-7,8 / 14-15 / 20,8-21,8 / 26,5 - 27,5 / 28-29 and 29-30 MHz), mechanical 3 kHz filter (F-455J-31), optional mechanical 6 kHz (F-455J-60) and 800 Hz (F-455J-05) filters, four step crystal filter, two speed AGC, passband tuning, noise limiter, crystal calibrator.

  Matches KWS-1 transmitter. Matching speaker 270G-3.

  First single-sideband amateurband-receiver of the world, around 5840 sets were made, below 200 of them at Collins Toronto, Ontario, plant.

• Net weight (2.2 lb = 1 kg)
• 15.9 kg / 35 lb 0.4 oz (35.022 lb)

• Price in first year of sale
• 495.00 $

• External source of data
• Eilert Menke

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

• Mentioned in
• The Pocket Guide to Collins Amateur Radio Equipment 1946 to 1980

• Literature/Schematics (1)
• QST (April 1955)

• Literature/Schematics (2)
• Communications Receivers

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 100 models, 77 with images and 35 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Collins Radio Company; Cedar Rapids (IA)