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ID = 22781
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Double Triode   Power/Output 
Identical to TKDD1 = KDD1
First year Feb.1936 Tube leaflet collection E.Erb Analysis by original leaflets (T7, V8)

Base Europe side contact P8A (Au P, 8SC)
Filament Vf 2 Volts / If 0.22 Ampere / Direct / Battery =
Description Wir verwenden bei Modellen nur die Grundröhre KDD1, denn es ist willkürlich, ob ein Apparat mit KDD1 oder der Tungsram TKDD1 ausgerüstet ist. 
Information source Taschenbuch zum Röhren-Codex 1948/49   

39_2.png TKDD1: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
TKDD1: Tungsram
Egon Strampe

Usage in Models 1= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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