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Micro-Bigril_R43

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ID = 21480
       
Country:
France
Brand: La Radiotechnique (RT); Paris, Suresnes
Developer: Dario (tubes) - voir aussi La Radiotechnique 
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to Micro-Bigril_R43 = Micro-Bigril = R43
Similar Tubes
Normally replaceable-slightly different:
  R43M
First year 1925 Saga of the Vacuum Tube, Tyne page 402
Base French Bigrille 5 pin (D)
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Description

Tyne: "Double-grid tubes came on the French market in 1924. At first they had tungsten filaments. By 1925 they were superseded by the dull-emitter version, space-charge rather than shield-grid tubes, and were first used in receivers at low anode voltage. Later they were used as frequency changers in superheterodynes. Examples of these are Métal's DG and RM, La Readiotechniaue's Micro-Bigril R43, and Grammont's Bigrille-Ampli and Bigrille BF." [EE]

 
tubeenvdiag_klein_mod_bigr_6~~2.gif
Micro-Bigril_R43: W.H.
Wolfgang Holtmann
tubesockel_klein_bigrillem_3_2~~2.gif Micro-Bigril_R43: W.H.
Wolfgang Holtmann
r43_spec_1.png
Micro-Bigril_R43: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

Collection of

Albert Vonarburg (CH)
 
micro_bigrill.jpg

 
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