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N148

Information - Help 
ID = 25799
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Beam Power Tube   Power/Output 
Identical to N148
Similar Tubes
Normally replaceable-slightly different:
  7C5

Base Loctal-8, B8G (Sylvania, 1938)
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Parallel, (AC/DC)
Description

Ua: 250 V; Ia: 40 mA bei Ug1: 4,3 V.
Schirmgitter U: 250 V, 7,5 mA
Steilheit 10,8 mA/V
Pa: 4,3 W

Babani zeigt abweichend (vermutlich falsch) If: 0,95 A

 
Information source Babani, International Radio Tube Encyclopaedia   Book 2, p. 35
 
marconi_n148.jpg
N148: my own photo
Michael Watterson

 
marconi_n148_base.png
N148: edit from Marconi T38A R&TVS
Michael Watterson

 

from Just Qvigstad

Usage in Models 3= 1950?? ; 2= 1950 ; 1= 1951? ; 1= 1952? ; 4= 1954

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11


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