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MS4 Info
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 TE42 (can normally be replaced - small diff'ce)   J4091 (can normally be replaced - small diff'ce)   E442 (can normally be replaced - small diff'ce)   AS494 (can normally be replaced - small diff'ce)   DW6 (can normally be replaced - small diff'ce)   S4150 (can normally be replaced - small diff'ce)  
Successor Tubes MS4B_Catkin  

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

marconims4_web.jpg
CA
Christian ADAM

 
ms4_so.png
rtt
Michael Schlör

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

Usage in Models   4= 1931 ; 4= 1932 ; 1= 1933? ; 1= 1933 ; 7= 1945? ;
Number of Models with this tube   17
No further Information for

MS4    

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03DecX