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75A

75A ; Collins Radio (ID = 214476) Amateur-R 75A ; Collins Radio (ID = 1314679) Amateur-R
75A ; Collins Radio (ID = 1436340) Amateur-R
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75A ; Collins Radio (ID = 214476) Amateur-R
Collins Radio: 75A [Amateur-R] ID = 214476 800x516
Select picture or schematic to display from thumbnails on the right and click for download.
For model 75A, Collins Radio Company; Cedar Rapids (IA)
 
Country:  United States of America (USA)
Manufacturer / Brand:  Collins Radio Company; Cedar Rapids (IA)
Year: 1946/1947 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)
Details
Power type and voltage Alternating Current supply (AC) / 115 Volt
Loudspeaker - For headphones or amp.
Power out 2.5 W (unknown quality)
from Radiomuseum.org Model: 75A - Collins Radio Company; Cedar
Material Metal case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 536 x 311 x 352 mm / 21.1 x 12.2 x 13.9 inch
Notes

Collins 75A 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.
Early 54A-1, the early sets came without limiter switch at the right above function knob.
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 75-A1 he states "Differs from 75A in limiter switch on right side above function knob"
Further clarification about this matter is still needed. Anyway first advertised in Electronics, December, 1946, page 256. No limiter switch visible in the image in the ad.

Net weight (2.2 lb = 1 kg) 25.8 kg / 56 lb 13.3 oz (56.828 lb)
Source of data Communications Receivers
Literature/Schematics (1) Shortwave Receivers - Past & Present (3rd ed.)

Model page created by Martin Bösch. 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.



  
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