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410SG

Information - Help 
ID = 12447
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 410SG
Similar Tubes
Normally replaceable-slightly different:
  4075SG ; 4SC ; A442 ; RES094
Heater different:
  220SG ; 6075SG ; 610SG

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Er) Top contact screw type
Filament Vf 4 Volts / If 0.1 Ampere / Direct / Battery =
Description

Ra 200k ohms; gm = 1mA/V at Vg=-1.5 and Va=150.
Price 1.1 GBP in 1929.

 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
410sg_1.jpeg
410SG: Photo of tube from my collection - TS
Tomasz Szczesniak

 
cossordata.png
410SG: own collection
Peter den Boer


Usage in Models 2= 1931

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


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