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SP4B

Information - Help 
ID = 10269
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to SP4B

Base British-7-Pin, old (M7A) (Codex=Nf)
Filament Vf 4 Volts / If 0.65 Ampere
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
gb_mullard_sp4brhre_1.jpg
SP4B: R.P.
Ralf Plaga

 
159_12.png
SP4B: Telefunken Werkstattbuch
Wolfgang Bauer

 
sp4b_techdat01.png
SP4B: Mullard Valves 1936
Peter Hoddow


Usage in Models 1= 1935?? ; 1= 1937? ; 2= 1937

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4


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