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JM

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ID = 25793
       
Country:
France
Brand:
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to JM = Bigrille_rouge = R67
First Source (s)
29.Dec.1928 : - - Manufacturers Literature Advert.

Base French Bigrille 5 pin (D)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / Direct / Battery =
Description

Base connections are different from the usual Bigrille types. Red base to prevent users from confusing the types.

 
Text in other languages (may differ)
Information source -- Collector info (Sammler)   

sockel_jm.gif JM: KoBi
Konrad Birkner † 12.08.2014

jm_adv~~1.png
JM: Advert. 1928
Anonymous 15 Collector

Usage in Models 1= 1928? ; 1= 1929

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of

 
jm_bild1.png

JM
 

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