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ID = 35670
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Transmitting Tube, Pentode, air cooled   Power/Output 
Identical to RK45
Similar Tubes
Heater different:

Base 7-Pin-Base U7B = medium, old, USA Top contact with a cap.
Filament Vf 12.6 Volts / If 0.45 Ampere / Indirect / Specified voltage AC/DC
Description Pentode power amplifier/oscillator; 10W anode dissipation. Full ratings operation up to 30MHz.
RK25 with 12.6V heater. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
Tube Lore (I)

rk45_sockel.png RK45: Raytheon Amateur Handbook 1938
Heinz Höger

Just Qvigstad
RK45: Raytheon Amateur Handbook 1938
Heinz Höger


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