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History of the manufacturer  

Burndept Ltd. London

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Name: Burndept Ltd. London    (GB)  
Abbreviation: burndept
Products: Model types Tube manufacturer

Burndept: the well established Burnham & Co had a wireless department, which became a separate entity when Witt Burnham established Burndept Ltd. as a private company.

Ethophone was the popular name for a number of models.

1925 they became a public company: Burndept Wireless Ltd. which later ran into financial problems: in June 1927 it was forced into receivership (Konkursverwaltung). But the company was not liquidated. The receiver (Konkursverwalter) took control and managed to recover to profitable working.

Ref.: Geddes/Bussey: The Setmakers

In 1925 Burndept introduced a series of valves: one bright emitter valve H.L.565, and eight dull emitter types.
After Burndepts bankruptcy in 1927 they ceased manufacture of valves and concentrated solely on radio equipment.
Ref.: Keith R. Thrower, British Radio Valves, The Vintage Years: 1904-1925.

Founded: 1922
Production: 1922 -
Burndept Generalvertretung Wien durch die Fa. Exoga, Wien 1, Stock-im-Eisen-Platz 3. Vertrieb von Burndept-Lautsprechern, Röhrenapparaten und Bestandteilen.

This manufacturer was suggested by Konrad Birkner † 12.08.2014.

Some models:
Country Year Name 1st Tube Notes
GB  22/23 H.F. Amplifier Mark I No. 108 [Flat cabinet] R_England   
GB  22/23 H.F. Amplifier Mark I No. 108S [Sloping cabinet] R_England   
GB  22 Burndept Ultra III Receiver    
GB  22 Burndept II Receiver    
GB  22 Burndept I Receiver R_England   
GB  22 Ethophone III [Early] R_England  Ethophone III    
GB  37 259   Electron-coupled output valve, frequency from 13.5m to 2000m. 7 tuned stages. Litz coils. ... 
GB  22 Burndept Ultra IV Receiver R_England  Burndept Ultra IV four-valve regenerative receiver. Wavelength covers 150 to 24,00... 
GB  25 Tuner X   80 - 25'000 meters 
GB  25 Constructeur KIT III   Complete kit to build a 3 tube receiver. Can be used with Burndept model Kit. 
GB  25 Ethophone grand luxe   En forme de bureau-secrétaire avec tiroirs. 
GB  25 KIT   Complete Kit to build a 1 tube amplifier. Can be used with Burndept model Kit III. 


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

Werbung in der Zeitschrift Radiowelt 1926, Heft 11tbn_gb_burndept_werbung_1926.jpg
February 18, 1922 The Wireless World magazine covertbn_gb_burndept_ultra_iv_feb._18_1922_wireless_world_cover.jpg