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75A-1; Collins Radio (ID = 811738) Amateur-R
75A-1; Collins Radio (ID = 811739) Amateur-R
75A-1; Collins Radio (ID = 951755) Amateur-R
75A-1; Collins Radio (ID = 951756) Amateur-R
75A-1; Collins Radio (ID = 951757) Amateur-R
75A-1; Collins Radio (ID = 951758) Amateur-R
75A-1; Collins Radio (ID = 951759) Amateur-R
75A-1; Collins Radio (ID = 951760) Amateur-R
75A-1; Collins Radio (ID = 951761) Amateur-R
75A-1; Collins Radio (ID = 951762) Amateur-R
75A-1; Collins Radio (ID = 226398) Amateur-R 75A-1; Collins Radio (ID = 226554) Amateur-R
75A-1; Collins Radio (ID = 951754) Amateur-R
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75A-1; Collins Radio (ID = 226398) Amateur-R
Collins Radio: 75A-1 [Amateur-R] ID = 226398 800x600
Select picture or schematic to display from thumbnails on the right and click for download.
For model 75A-1, Collins Radio Company; Cedar Rapids (IA)
Country:  United States of America (USA)
Manufacturer / Brand:  Collins Radio Company; Cedar Rapids (IA)
Year: 1946–1950 Category: Amateur-Receiver (amateur bands, may include broadcast bands)
Valves / Tubes 14: 6AK5 6SA7 6AK5 6SK7 6L7 6SJ7 6SG7 6SG7 6H6 6SJ7 6SJ7 6SJ7 6V6GT 5Y3GT
Main principle Superhet, double/triple conversion; ZF/IF 1500-2500/500 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
from Model: 75A-1 - Collins Radio Company; Cedar
Material Metal case
Shape Boatanchor (heavy military or commercial set).
Dimensions (WHD) 21.12 x 12.25 x 13.8 inch / 536 x 311 x 351 mm
Notes Collins 75A-1 Amateur Band Communications Receiver: Double conversion, AM/CW, six amateur bands from 80 - 10 meters (3,2-4,2 / 6,8-7,8 / 14-15 / 20,8-21,8 / 26-28 and 28-30 MHz), five step crystal filter 0.2 to 4 kHz, optional mechanical IF filters.
Sometimes referred to as 75A:
Osterman states: "One view is that the 75A-1 was simply referred to as Collins 75A until the 75A-2 came out in 1950. Another theory suggests that a small run of < 200 75A's were made in 1946." Moore has in his remarks: "Early 75A" and shows an image without limiter switch, in the remarks of the 75A-1 he states "Differs from 75A in limiter switch on right side above function knob"
Further clarification about this matter is still needed.
Net weight (2.2 lb = 1 kg) 28.5 kg / 62 lb 12.4 oz (62.775 lb)
Price in first year of sale 375.00 $
External source of data Eilert Menke
Source of data Communications Receivers
Mentioned in The Pocket Guide to Collins Amateur Radio Equipment 1946 to 1980
Literature/Schematics (1) Shortwave Receivers - Past & Present (3rd ed.)
Literature/Schematics (4) Photofact Folder, Howard W. SAMS (Set 34, Date 2/48, Folder 484-4)

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

All listed radios etc. from Collins Radio Company; Cedar Rapids (IA)
Here you find 94 models, 69 with images and 33 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.