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ID = 2524
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Vacuum Pentode   beam power   RF/IF-Stage   Controlling (mu) 
Identical to KTW61M
Similar Tubes
Other shape (e.g. bulb type):

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description Metallised Bulb. See KTW61 for the plain glass version. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
KTW61M: Tube collection
Antonio Martins-Pais

More ...
KTW61M: rtt
Anonymous 10 Collector

KTW61M: Babani
Jacob Roschy

from Just Qvigstad

Usage in Models 5= 1940 ; 4= 1942 ; 4= 1946 ; 4= 1947 ; 2= 1948?? ; 2= 1948? ; 1= 1949? ; 1= 1951? ; 1= 1951

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):24

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