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R643

Information - Help 
ID = 28734
       
Country:
France
Brand: Dario (tubes) - voir aussi La Radiotechnique
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to R643
Similar Tubes
Other base:
  R643_7pin
First year 1927 Saga of the Vacuumtube, Tyne page 405

Base Europe "B5 big size" (D, Bigrille) 2 Sidecontacts
Filament Vf 0.6 Volts / If 1 Ampere / Direct / Parallel, (AC/DC)
Description

Frequency changer

 
Text in other languages (may differ)
 
f_dario_r643_data.png
R643: La Nature 1930
Mark Hippenstiel


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
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