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A-4 ; RCA Victor (ID = 595732) Radio
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A-4 ; RCA Victor (ID = 867423) Radio
RCA Victor: A-4 [Radio] ID = 867423 647x933
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For model A-4, RCA Victor (International), Montreal:
By courtesy of guest Luc Doucet, Dieppe, Nouveau-Brunswick CANADA.
Country:  Canada
Manufacturer / Brand:  RCA Victor (International), Montreal
Year: 1939/1940 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 7: 6SK7 6SA7 6SK7 6SQ7 6U5 6F6G 5Y4G
Main principle Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast plus more than 2 Short Wave bands.
Power type and voltage Alternating Current supply (AC) / 105-125 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
Power out 2 W (5 W max.)
from Model: A-4 - RCA Victor International,
Material Wooden case
Shape Console with Push Buttons.
Dimensions (WHD) 635 x 995 x 310 mm / 25 x 39.2 x 12.2 inch
Notes This RCA model A-4 (A4) has the broadcast band (540 - 1720 kc) plus the following four short wave bands: 49 (5.9 - 6.24 mc), 31 (9.41 - 9.69 mc), 25 (11.68 - 11.92 mc) and 19 (15.09 - 15.38 mc). The scale offers 6 push buttons for fixed stations on the broadcast band. There is a "Radio-Tone-Phono-Television switch" and a "television socket" plus a separate "phone socket". The choke field is for the magnetic field of the loudspeaker which has also a "hum neutralizing coil". The magic eye 6U5 is a bit hidden within the scale. With its RF stage (6SK7) and 7 tuned circuits the model A4 has a very good reception. The same applies for the table radio A3 which uses the same documentation and circuit. Power supply with rating A is for 50 to 60 cycles, the one with rating B is for 25 - 60 cycles, each 80 watts. The loudspeaker for A4 is RL70H-1 12 inch and the one for A3 is RL79-1 6 inch, both with impedance 3.4 ohms at 400 cycles.
Price in first year of sale 119.50 CAD
Source of data -- Original-techn. papers.
Mentioned in Pre-War Consoles (Volume 1939-1940 page 9)
Literature/Schematics (1) The Winnipeg Tribune; 1940-04-29

Model page created by Ashis Mukerjea. See "Data change" for further contributors.

All listed radios etc. from RCA Victor (International), Montreal
Here you find 616 models, 386 with images and 571 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Forum contributions about this model
RCA Victor: A-4
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rca-victor: A4
Ernst Erb

This is the warning sticker on the model RCA Montreal Canada model A4:

Warning  Any person installing or operating this radio receiving set without having obtained a licence from the Ministry of transport of Canada is liable to be prosecuted and sentenced to a penalty not exceeding fifty dollars and three months emprisonment.
No person shall sell any radio receiving set to any person for installation or operation until the purchaser has produced for inspection by the vendor of his licence to operate such set.
No person shall service a radio receiving set until the owner thereoff produces to such person his licence to operate such set.
      Extract from Radio Telegraph Act, Part 11, Regulation 31 (Effective 1st 1938)

This is typical for a 1939 radio in Canada. The text of the sticker was sent to me by guest Luc Doucet in Canada. Would be nice to publish the text before this ...

RCA Victor: A-4
End of forum contributions about this model