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ID = 22709
Brand: Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.)
Tube type:  Double Tetrode   UHF 
Identical to SRS4452 = QQE03/20
Similar Tubes
Normally replaceable-slightly different:

Base Septar (1+6 pins) 2 Top contacts.
Filament Vf 12.6 Volts / If 0.65 Ampere / Indirect / Specified voltage AC/DC
Description Sockel: Septar B7A
Heizfaden mit Mittenanzapfung, daher Uf=6,3V; Ih=1,3A möglich. 
Dimensions (WHD)
incl. pins / tip
46 x 68 x mm / 1.81 x 2.68 x inch
Tube prices 1 Tube prices (visible for members only)
Information source - - Manufacturers Literature   RFT-Spezialröhren, 1965

srs4452_so.png SRS4452: rtt
Anonymous 10 Collector

SRS4452: RFT-Spezialröhren 1965
Anonymous 15 Collector

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