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R4B_MO

Información - Ayuda 
ID = 28728
       
País:
Gran Bretaña (GB)
Marca: Osram-Valves GB (not MO-Valves)
Tipo:  Triode, vacuum   Universal 
Idéntica a R4B_MO = R4B_BTH = R4B_Marconi
Fuente principal (es)
1918 : British Radio Valves - The Vintage Years: 1904-1925 p.26
Válvulas Predecesoras R4A  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Usada en Militaire et/ou Services Publics
Filamento Vf 3.8 Volt / If 0.65 Ampere / Direct / Battery =
Descripción

This tube was made with either a European B4 base or an Edison E12 base (the measurements above are for a tube with E12 base). In the latter case, the plate and grid connections were from wire leads on the top of the bulb. First made by Osram GEC June 1917. Two tubes are known to exist where the E12 base is in place but was not used.

 
Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip
x 86 x 50 mm / x 3.39 x 1.97 inch
Peso 33 g / 1.16 oz
Literatura Saga of the Vacuum Tube, Tyne   page 380
- - Manufacturers Literature   Gec cat. about 1924
- - Manufacturers Literature

b4_1~~70.png R4B_MO: Fin Stewart
Fin Stewart


Just Qvigstad
r4br4csmall.png
R4B_MO: own collection
Peter den Boer † 2025

Colección personal de

 
uk_gec_r4b_a.jpg

R4B_MO
 

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