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ID = 623
Tube type:  Current Regulator, Urdox without FeH 
Identical to U518H = U518-H

Base Swan-Bajonet, small =B9=9.5 mm
Description 3...7 V; 180 mA 
Information source
U518H: eigene Sammlung
Malte Rosenbaum


from Just Qvigstad

Usage in Models 1= 1940? ; 1= 1941?? ; 1= 1941? ; 1= 1942?

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

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