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ID = 9620
United States of America (USA)
Tube type:  Transmitting Triode, air cooled   UHF 
Identical to 15E = 4C30 = 8023 = 3-15A3 = CV933
Successor Tubes 15R  

Base SPECIAL TUBEBASE in general (Codex=sp) Sidecontact and top contact.
Was used by Radar
Filament Vf 5 Volts / If 4 Ampere / Direct

UHF transmitting triode, mu 25, 20W plate dissipation. Thoriated tungsten filamentary cathode. Used as oscillator for frequencies up to 500MHz, also in ring oscillator circuits.

Two were used in the ASB-1 transmitter, 1941, giving 5 kW pulses at 515 MHz. Four used in the ASB-3 transmitter, 1942, generating 15 kW pulses. Six in the ASB-7 transmitter, 1943, giving 50 kW pulses.

15E was also considered one of the best noise source when operated as controlled temperature diode. MIT Radiation Lab Series, Microwave Receivers by S. N. Van Voorhis.

Dimensions (WHD)
incl. pins / tip
59 x 70 x 36 mm / 2.32 x 2.76 x 1.42 inch
Weight 28 g / 0.99 oz
Tube prices 1 Tube prices (visible for members only)
Information source Tube Lore (II)   201
Tube Lore (I)   
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

15E: TM11-467 Radar System Fundamentals
Emilio Ciardiello

15e_sock.png 15E: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

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