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ID = 19344
Tube type:  Gas Triode   Detector 
  <1925 very rare. ***
Identical to Round_Type-C
Similar Tubes
Other base:
First year 1913 History of the British Radio Valve to 1940 Thrower page 32
Successor Tubes Round_Type-N  

Base Swan-Bajonett B22=22 mm 2 Sidecontacts.
Was used by Radio/TV-reception etc.
Filament If 2.5 Ampere / Direct / Battery =

Towards the end of 1911, Harold J. Round of the Marconi Company designed diode valves but suspended his work until November 1912 when he also did some work on triodes. The first successful soft valves of Round were produced in 1913. The valve was probably influenced by the soft valve of von Lieben, Reisz and Strauss since there were some agreements between Marconi and Telefunken at that time. Type C was also used for a r.f. amplifier in direction finding equipment which went into service in 1914. This tube was madewith either E27 or B22 base. The grid and anode connections were from wire leads on the sideof the bulb.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x x 51 mm / x x 2.01 inch
Information source British Radio Valves - The Vintage Years: 1904-1925   pages 17 & 19
Saga of the Vacuum Tube, Tyne   pages 207 & 208

Just Qvigstad
Usage in Models 1= 1914

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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