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ID = 20537
Brand: Common type Europe tube/semicond.
Tube type:  Half-Wave Vacuum Rectifier 
Identical to EY70 = 5641 = CV473
Similar Tubes
Multiple differences or of other kind:
First Source (s)
Mar.1955 : Funkschau # 6

Base Subminiatur-8, with space 1/8, B8D
Filament Vf 6.3 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC
Description max. 250 V eff Wechselspannung, max. Anodenstromwert 45 mA 
Dimensions (WHD)
incl. pins / tip
10 x 38 x 10 mm / 0.39 x 1.50 x 0.39 inch
Information source
EY70: RR
Reinhard Riek

EY70: RTT Schwandt
Günther Stabe † 19.8.20

More ...
EY70: Mullard-original papers
Bernd Staginnus

More ...

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