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Guide for Transmitting Tubes

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UIDEfor TRANSMITTING TUBES 104 ENGINEERS EXPERIMENTERS 904citscied. SPECIAL CHART FOR TRANSMITTING TUBES 1Air-and Water -Cooled, PHOTOTUBES, CATHODE RAY AND SPECIAL TUBES 111111111111111111.11111.0 Price 35 Cents RAMO CORPORATION OF Asioncit, CAMDEN, N. J., U.*. A. Nes, POWER WHEN YOU WANT IT AS MUCH AS YOU WANT FOR THE SERVICE YOU WANT 450 WATTS INPUT- TUBE COST, $7.00 RCA -812triodesinpush-pull will take 460 watts input up to 60 Mc-an all-time high in tube economy with 64.3 watts input per dollar. RCA -812's and their high -mu companions, RCA -811'e, are the only low-pricedtubes with the Zirconium -coated an- ode. This anode, an RCA devel- opment, has very high heat dis- sipating qualities and functions asahighlyeffectivegetter. 360 WATTS INPUT-LESS THAN A WATT OF DRIVE! The RCA -813 beam transmitting tube offers real power and circuit amplification.It makes possible efficient and flexible ligh-gain stages at a cast comparable with that of equipment usingDrdi nary tube 2ombinations. 6,36) VOLTS AT 1/2 AMPERE: Single-phase full -wave, briclg? recti- fier using Lang -life 866-A/886's de- livers over three kilowatts of power to the load. RCA-866-A/866's handle high voltagesat lowinitialcost, have tremendous emission reserve, and provide longerlife.Reason are that these tubes are designed with improued filaments, have dame bulbs andnsulated plate caps. at, PUSH-PULL BEAM POWER ON 150 Mc The 811 in this tuned4ine r -f power amplifier de- livers50 watts output at 160 Mc-with a grid drive of less than one -bait watt. It will operate satisfactorily at 7eclutrd input up to 226 Mc. For economical p -p Imam jaowar in modern UHF ap- plications, this tube isa logical choice. r .,, - 4,000 WATTS INPUT AT 20 Mc The two RCA -833-A triodes shown at the left are operated C in push-pull as en r -f power amplifier in push-pull at a platevoltageof4,000voltsand aplatecurrentof 1 r- ampere! Small and compact, the332-A willhandle sev- eral kilowatts of power in a tube less than 9 inches high and 4%" in diameter.It Anises the famous RCA Zircon- Pior ium -coated anode and has a maacimana plate dissipation of 450 watts (ICAS). This ultra -modes -1triode is built to last. ..,, "I -s`--,....)1 ..'..', LI . Fil, , .... Copyright 1943 by Eadio Corporation of America, RCA Victor Division FOREWORD On radio communication rests man's destiny.Like the magic of Merlin, it con- trols airfleets, moves armies, guides convoys, dissolves horizons.It is the coordin- ator of fighting legions. It controls the destiny of nations. Power Tubes make radio communication possible. Within their geometric confines evolves the phenomena of electronics on which hinges the complicated functioning of communication equipment. Small wonder then that the need for Power Tubes on the front line of battle is tremendous and that a supreme effort is needed to sup- ply them in the quantities required. That means that Power Tubes for all other purposes may become even more difficult to replace. It is, therefore, a patriotic duty and sound business policy to operate tubes wisely. We welcome the opportunity to cooperate in helping RCA Transmitting Tube users to extend tube life to the fullest by setting forth the following suggestions. Operate tubes conservatively. Avoid overloading.Follow carefully the instruc- tions and published data outlined in the Instruction Book packed with each tube. Reduce grid, screen and plate dissipation. Use forced ventilation wherever pos- sible.Use adequate fuse and overload -relay protection.Preheat mercury-vapor rectifiers-measure ambient temperatures. Operate tubes having coated cathodes and thoriated-tungsten filaments at rated cathode or filament voltages. Reduce filament voltage of pure tungsten -filament types wherever possible.(A 5% de- crease will double tube life when the transmitter can be adjusted for operation closer to maximum permissible distortion). Operate spare tubes occasionally. In presenting the 1944 RCA GUIDE to radio engineers and techniciansinthe Services and in the war industries, it is our belief that the up-to-date information contained in this volume will prove most helpful in choosing the right tube for the job and in getting the most from the tubes on the job. Should you desire addition- al information on any of the tubes described herein, or if you have special tube problems, we invite you to write to the Commercial Engineering Section, RCA Victor Division, Radio Corporation of America, Harrison, N. J. Should you need sales information on RCA tubes or any other RCA product, we invite you to write to the Sales Department, RCA Victor Division, Radio Corporation of America, Camden, N. J. Prices in this book apply only in the LICENSE NOTICE FOR RCA TUBES United States of America and are Licensed for all uses other than in apparatus subject to change or withdrawal with- and systems for use in thefieldof public out notice. Prices are those effective service communication for hire or toll.The December 15, 1943 and are exclusive sale of this device does not convey any license of all Federal, State and local excise, under patent claims on combinations of the sales and similar taxes. device with other devices or elements. OUTSTANDING CONSTRUCTIONAL FEATURES OF THE 813 BEAM TRANSMITTING TUBE The 813 is RCA's largest glass air-cooled beam transmitting tube. It is designed for transmitters requiring exceptional over- all efficiency.It is a logical choice for the ultra -modern final and intermediate r -f amplifier that needs no neutralizing adjust- ments and that can switch channels in a flash. Also, it meets the requirements for high -power transmitters having few tun- ing controls and a minimum of driver equipment. RCA -813 doubles, triples, and quadruples with unusually high efficiency and high harmonic output. In brief, this exceptional beam tube can handle a greater variety of big-time jobs than any other tube of its size or class. O MEDIUM METAL CAP O SHORT RIBBON PLATE CONNECTOR FILAMENT SUPPORT SPRINGS OMOUNT SUPPORT O TOP CERAMIC MOUNT SUPPORT OTOP SHIELD O ALIGNED -TURN CONTROL AND SCREEN GRIDS O HEAVY-DUTY FILAMENT O LARGE STURDY GRAPHITE PLATE HARD -GLASS BULB BOTTOM SHIELD DISC CERAMIC PLATE -SUPPORT SPACER DIRECTIVE -TYPE GETTER CONTAINER (1) DISH -TYPE STEM e CERAMIC -INSERT GIANT BASE (r) BEAM -FORMING PLATE FILAMENT CONNECTOR TUNGSTEN -TO -GLASS SEAL (r) BOTTOM CERAMIC MOUNT SUPPORT CoNTENTS TUBE DATA BY TYPES PAGE PAGE PAGE 0A4 -G 44 837 29 1609 45 1C21 44 838 29 1610 42 1P21 44 841 41 1612 45 2AP1 43 842 41 1613 42 2C21/1642 44 843 41 1614 42 2C22 44 845 41 1616 42 2X2/879 42 816 41 1619 42 3AP1/906-P1 43 849 41 1621 45 3BP1 43 850 41 1622 45 3EP1/1806-P1 43 852 41 1623 10 4B26/2000 44 857-B 42 1624 42 4E27/8001 34 858 41 1625 42 5BP1/1802-P1 43 860 41 1626 42 5BP4/1802-P4 43 861 41 1629 45 5CP1 43 862 41 1631 45 5CP4 43 864 45 1632 45 5HP1 43 865 41 1633 45 5HP4 43 866-A/866 20 1634 45 5R4-GY 44 868 44 1635 45 6AK6 44 869-B 42 1644 45 7AP4 43 870-A 42 1840 43 7CP1/1811-P1 43 872-A/872 30 1847 43 9A P4/1804 -P4 43 874 45 1848 43 9C21 41 878 42 1849 43 9C22 41 880 41 1850 43 9JP1/1809-P1 43 884 31 1851 45 12A6 44 885 31 1898 43 12AP4/1803-P4 43 889 41 1899 43 12L8-GT 44 889-R 42 2050 31 VR75-30 44 891 42 2051 31 VR105-30 45 891-R 42 7193 45 VR150-30 45 892 42 8000 33 203-A 41 892-R 42 8003 35 204-A 41 893 42 8005 36 207 41 893-R 42 8012 38 211 41 898 42 8013-A 39 217-A 42 902 43 8016 39 217-C 42 904 43 8025 38 800 41 905 43 9001 40 801-A 41 907 43 9002 40 802 4 908 43 9003 40 803 5 914 43 9004 45 804 5 917 41 9005 45 805 6 918 44 9006 45 806 7 919 44 807 8 920 44 808 9 921 44 809 10 922 44 GENERAL INFORMATION 810 11 923 44 811 13 924 41 Constructional View of 812 14 925 44 a Beam Transmitting 813 15 926 44 Tube 2 814 17 927 44 Tube Data Charts 41 815 18 929 44 Transmitting Circuit 816 20 930 44 Facts 46 825 21 931-A 44 826 21 934 44 Variable Frequency 827-R 22 935 44 Oscillator 52 828 23 951 32 Economy Transmitter 57 829-B 25 955 32 UHF 815Transmitter 830-B 41 956 32 (21/2 to160 Meters)59 832 25 957 32 41 958 32 Single -Control Trans- 832-A mitter Using 813 64 833-A 26 959 32 834 28 991 45 Plate -ModulatedTrans- 835 41 1602 45 mitter 67 836 28 1608 42 Filter Design Curves 72 For soles information regarding any RCA product, Far technical information on RCA Tubes, please write to please write to SALES DEPARTMENT COMMERCIAL ENGINEERING SECTION RCA VICTOR DIVISION of RCA VICTOR DIVISION of RADIO CORPORATION OF AMERICA RADIO CORPORATION OF AMERICA CAMDEN. N.J. HARRISON, N. .1. TRANSMITTING TUBE DATA TRANSMITTINGPENTODE SPECIAL INTERNAL SHIELD DESIGN $3.50 33 WATTS INPUT List Price Features EXCELLENT OSCILLATOR Crystal current extremelylowinstraightpentode crystal -oscillator connection.Gives high output as electron -coupled oscillator. 802 EXCEPTIONALLY WELL -SHIELDED TUBE STRUCTURE Tube contains special internal shield.
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