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MS4

Country:  Great Britain (UK)      Brand:  Marconi-Osram - (Valves/Tubes); GB 
  Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Tube ID = 2535
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Identical to MS4
Similar Tubes Normally replaceable-slightly different:
 AS494; CV1164; DW6; E442; J4091; S4150; TE42
Successor Tubes MS4B_Catkin  

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er)
Filament Vf 4 Volts / If: 1 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Literature Taschenbuch zum Röhren-Codex 1948/49   

marconims4_web.jpg
MS4: CA
Christian ADAM

 
ms4_so.png
MS4: rtt
Michael Schlör

 
m.s4_osram.png
MS4: osram wireless guide 1931
Giuseppe Antonio Tusini

Usage in Models   6= 1930 ; 12= 1931 ; 12= 1932 ; 4= 1945?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   34

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