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History of the manufacturer  

Brown S. G. Ltd.; London

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Name: Brown S. G. Ltd.; London    (GB)  
Abbreviation: brown

S.G. Brown Ltd., Victoria Rd., North Acton, London W3.


Some models:
Country Year Name 1st Tube Notes
GB  23 Telephone Relays   Electromechanical amplifier composed of 2 Telephone Relays. Amplificateur électromécani... 
GB  25 C.W. Syntoniser    
GB  15 Morse Key N° 1969   An aeroplane wireless morse key by S.G. Brown. A spark is produced between the contacts at... 
GB  14 Wireless Telephone Relay    
GB  26 Horn Speaker Type E   This model could be a marriage of a Type E driver with a different horn. Remains to be inv... 
GB  27 Duplex V12    
GB  25 Power Loud Speaker   Public Address speaker. Straight horn, diameter 36", length 71", usually mounted... 
GB  23 Headphones Type F Early Aluminium   Early S.G.Brown Type F aluminium cased Headphones 2000 ohms each making total of 4000ohms. 
GB  24 Cor de Chasse   Electromagnetic speaker. Height: 20 inch. 
GB  26 Loop for the SM 14 set    
GB  25 LT01    
GB  39 Movable light-up cone   Speaker with movable light-up cone. 


Further details for this manufacturer by the members (rmfiorg):

Thanks for Első Zalai Rádiómúzeum Alapítvány, First Zala County Radio Museum Foundation Hungary (
Thanks for technical assistance Első Zalai Rádiómúzeum Alapítvány (, First Zala County Radio Museum Foundation, Hungary, Zalaegerszeg.tbn_gb_brown_powerp_37_logo_1926.jpg
Sidney George Brown, F.R.S. Engineer, Inventor, founder of S. G. Brown, Limited by Ian L. Sanders.tbn_gb_sg_brown_ian_l_sanders.jpg