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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
Summary:

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 -
History:
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  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. 
GB  25 Constructeur KIT   Complete Kit to build a 2 tube amplifier. Can be used with Burndept model Kit II. 
GB  25 Power Amplifier with the Ethophone V   Can drive up to 30 speakers. 
GB  25 Ethophone V    
GB  25 Ethophone [Grand modéle]   80 à 25'000 mètres. Coffret avec portes et incrustations de bois de r... 
GB  25 Constructeur KIT II   Complete kit to build a 2 tube receiver. Can be used with Burndept model Kit. 
GB  24 Big Console   Considered the handsomes set at the London exposition of 1925. Contains: tuner, 2 RF, 1... 

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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

  
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