List of Vacuum Tubes - Numbered Tubes - Other Numbered Tubes - 8

8

  • 800 Directly heated V.H.F. power triode, giving 35 watts up to 60 MHz and 18 watts at 180 MHz. American 4-Pin(UX)base with side locating pin.
  • 801Directly heated power triode, used in pairs in class B in A.M. modulation sections of transmitters giving up to 45 watts of power at 60 MHz and 22 watts at 120 MHz.
  • 802 Indirectly heated H.F. power pentode, giving 8 watts up to 30 MHz and 4 watts at 110 MHz.
  • 803 Directly heated H.F. power pentode, giving 50 watts up to 20 MHz and 25 watts at 70 MHz.
  • 804 Directly heated H.F. power pentode, giving 20 watts up to 15 MHz and 10 watts at 10 MHz.
  • 805 Directly heated H.F. high-mu triode, giving 140 watts up to 30 MHz and 70 watts at 85 MHz..
  • 806 Directly heated H.F. high-mu triode, giving 390 watts up to 30 MHz 195 watts at 100 MHz.
  • 807 Indirectly heated H.F. beam power tetrode, giving 25 watts up to 30 MHz and 12 watts at 125 MHz. A variation of type 6L6 originally designed as a Class C transmitter tube. Later used in pairs as push-pull outputs for high-wattage Class AB2 audio amplifiers. Also used as a horizontal output tube in early television receivers. One of the first commercial tubes that used the top cap to connect the plate (instead of the control grid) to the circuit.
  • 808 Directly heated H.F. high-mu triode, giving 140 watts up to 30 MHz and 70 watts at 130 MHz.
  • 809 Directly heated H.F. high-mu triode, giving 55 watts up to 27 MHz and 30 watts at 100 MHz.
  • 810 Directly heated H.F. triode, 10 volt filament and Zirconium Carbide anode. Base fits R.C.A. UT-541A Socket.
  • 811A Directly heated H.F. triode, 6.3 volt filament, 88 watts
  • 813 Beam Power Tetrode possessing about 5 times the Anode dissipation of an 807.
  • 814 A directly heated Beam Power Tetrode giving about 130 watts at 30 MHz and 65 watts at 100 MHz operating in class C.
  • 815 An indirectly heated dual Pentode. International Octal, (IO), base.
  • 829 A dual indirectly heated beam power tetrode. Two 6.3 volt heaters sharing a common tap.
  • 830 A directly heated triode giving about 50 watts at 15 MHz and 7.5 watts at 60 MHz operating in class C.
  • 831 A directly heated triode giving about 400 watts at 20 MHz and 200 watts at 60 MHz operating in class C. 11 volt heater/filament.
  • 833 A larger directly heated high-mu triode giving about 1 kW at 30 MHz and 500 watts at 45 MHz operating in class C. Usable up to 100 MHz at reduced power, (400 W). 10 volt heater/filament drawing 10 A. The anode/Plate of this device is fabricated from tantalum. Plate current of 800 mA with a plate voltage of 3 kV and grid voltage of zero. Plate current of 4.3 A at a voltage of 750 with 350 volt on the grid. Superseded by the 833A. Uses two-part R.C.A socket assembly UT-103.
  • 833A A larger directly heated high-mu triode giving about 1 kW at 30 MHz and 500 watts at 45 MHz and 400 watts at 100 MHz operating in class C. 10 volt heater/filament drawing 10 A. The anode/Plate of this device is fabricated from tantalum.
  • 834 A directly heated triode giving 58 watts at 100 MHz and 25 watts at 350 MHz operating in class C. 7.5 volt heater/filament. Fitted with an American 4-Pin, (UX4), base with side locating pin.
  • 836 An indirectly heated high vacuum diode with a peak inverse voltage of 5 kV and peak anode current of 1 ampere. 2.5 volt heater.
  • 837 An indirectly heated pentode giving 11 watts at 20 MHz and 5 watts at 80 MHz. operating in class C. 12.6 volt heater.
  • 838 A directly heated triode giving about 100 watts at 30 MHz operating in class C. 10 volt heater/filament.
  • 841 A directly heated high-mu triode giving about 10 watts at 6 MHz and 5 watts at 170 MHz operating in class C. 7.5 volt heater/filament.
  • 842 A directly heated triode giving about 3 watts at 6 MHz operating in class C. 7.5 volt heater/filament.
  • 843 An indirectly heated tetrode giving gain at 6 MHz and usable up to 200 MHz operating in class C. 2.5 volt heater/filament.
  • 844 A directly heated triode giving gain at 6 MHz and usable up to 155 MHz operating in class C. 2.5 volt heater/filament.
  • 845 A directly heated triode giving up to 24 watts if undistorted power in class-A at audio frequency with an anode voltage of 1250. 11 volt heater/filament.
  • 849 A directly heated triode giving gain at 3 MHz operating in class C. Two 849s, working in push-pull class B are capable of delivering 1.1 kW of audio output with an anode voltage of 3 kV. Usable up to 30 MHz. 11 volt filament/heater.
  • 850 A directly heated tetrode giving 120 watts of power gain up to 13 MHz and 50 watts at 100 MHz, operating in class C. 10 volt heater/filament.
  • 851 A directly heated triode giving 1.5 kW of power up to 3 MHz operating in class C. 11 volt heater/filament.
  • 852 A directly heated triode giving 75 W of power up to 30 MHz operating in class C. 10 volt heater/filament.
  • 857B Large mercury vapor rectifier used in 50 kW class broadcast transmitters. 22 kV anode voltage, 10 A anode current. Filament 5 V @ 30 A
  • 860 A directly heated tetrode giving 105 W of power up to 30 MHz and 50 watts at 120 MHz operating in class C. 10 volt heater/filament.
  • 861 A directly heated triode giving 400 W of power up to 20 MHz and 200 watts ad 60 MHz operating in class C. 11 volt heater/filament.
  • 862 Large water-cooled triode for broadcast/industrial applications. Used in experimental 500 kW transmitter at WLW.
  • 864 A directly heated general-purpose triode with a maximum anode voltage of 135 and anode current of 3.5 mA. 1.1 volt heater/filament.
  • 865 A directly heated tetrode giving 30 W of power up to 15 MHz 15 watts at 70 MHz operating in class C. 11 volt heater/filament.
  • 866 A Mercury Vapor Diode with a peak inverse voltage of 5 kV and peak anode current of 1 ampere. Average anode current, 250 mA, forward drop, 15 volt. Heater voltage and current, 2.5 at 5 A. American 4-Pin(UX) base.
  • 866A A Mercury Vapor Diode with a peak inverse voltage of 10 kV and peak anode current of 1 ampere. Average anode current, 250 mA, forward drop, 10 volt. Heater voltage and current, 2.5 at 5 A. American 4-Pin (UX) base.
  • 872 A Mercury Vapor Diode with a peak inverse voltage of 5 kV and peak anode current of 5 amperes. Average anode current, 1250 mA, forward drop, 15 volt. Heater voltage, 5.0 at 10 A. Base fits R.C.A. UT-541A Socket.
  • 872A A Mercury Vapor Diode with a peak inverse voltage of 10 kV and peak anode current of 5 amperes. Average anode current, 1250 mA, forward drop, 10 volt. Heater voltage, 5.0 at 6.25 A. Base fits R.C.A. UT-541A Socket.
  • 879 A high vacuum Diode with a peak inverse voltage of ca. 15 kV and peak anode current of ca. 5 mA. 2.5 volt heater and American 4-Pin, (UX) base. Used as half wave rectifier for high voltage cathode ray tube supplies. Similar to type 2X2.
  • 884 An indirectly heated triode thyratron. 6.3 volt heater/filament, International Octal, (IO), base. Electrically similar to type 885. Once commonly used as a sawtooth horizontal sweep waveform generator in recurrent-sweep oscilloscopes. Marketed by DuMont under the type number 6Q5.
  • 885 An indirectly heated triode thyratron. 2.5 volt heater/filament, American 5-Pin (UY) base. Otherwise similar to type 884.
  • 898 Large water-cooled triode for broadcast/industrial applications. Updated version of 862, with 3 phase filament structure.
  • 8974 Giant water-cooled megawatt-class tetrode used for super-power broadcast and industrial service. Believed to be the most powerful tube ever commercially produced.

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