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A4AM

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ID = 20639
       
Country:
Spain
Brand: Castilla; Madrid
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to A4AM = E446

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.1 Ampere / Indirect / Parallel, (AC/DC)
 
a4amfren.jpg
A4AM: Colección propia
Marcelino Iniesta Fernandez

 
13_35.png
A4AM: Telefunken Werkstattbuch
Wolfgang Bauer

 

from Just Qvigstad

Usage in Models 1= 1933 ; 1= 1934 ; 2= 1935

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


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