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ARDE_HF

Information - Help 
ID = 28991
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Developer: Ediswan, Siemens Edison Swan Electric Co.; London 
Tube type:  Triode, vacuum   RF/IF-Stage 
  <1925 very rare. ***
Identical to ARDE_HF
Similar Tubes
Normally replaceable-slightly different:
  ARDE
First year 1923 Saga of the Vacuumtube, Tyne page 373

Base Europe 4-Pin (A, 4A, B4, since 1914)
Was used by Radio/TV-reception etc.
Filament Vf 1.8 Volts / If 0.3 Ampere / Direct / Battery =
Description

First made in 1924, this tube has a red stripe painted on the side of the glass, from the base to the tip. This indicates that the tube is for High Frequency use. The stripe measures about 3 mm wide and over time, in many cases, the stripe has worn off..

 
Dimensions (WHD)
incl. pins / tip
x 110 x 31 mm / x 4.33 x 1.22 inch
Weight 47 g / 1.66 oz
Literature
 
ardeediswan1_klein_klein.jpg
ARDE_HF
Geri Meier

 
ardehf_spec.png
ARDE_HF: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector



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