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ID = 21181
United States of America (USA)
Brand: Amperex; New York
Tube type:  Double Tetrode   VHF 
Identical to AX9905 = 5895 = QQC04/15
Predecessor Tubes QQC04/15  

Base Loctal-8, B8G (Sylvania, 1938)
Filament Vf 6.3 Volts / If 0.68 Ampere / Direct / Specified voltage AC/DC
Description Dual power tetrode capable of operating up to 186MHz fill ratings and up to 300MHz at reduced input. Anode power dissipation: 6W CCS, 8W ICAS.
Amperex proprietary code for Philips QQC04/15. 
Text in other languages (may differ)
Information source Röhren-Taschen-Tabelle, (Franzis RTT)   
- - Manufacturers Literature   

lo40_g_4.gif AX9905: RTT Schwandt
Günther Stabe † 19.8.20

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