RCA 833A User's Manual
Contents
1. 1 1 2 100 100 Peak AF Grid to Grid Voltage i 480 510 Zero Signal DC Plate Current 100 100 Max Signal DC Plate Current 800 900 Effective Load Resistance Plate to plate 12000 11000 Max Signal Driving Power eit 29 38 Max Signal Power Output Approx 20400 2700 T Averaged over any audio frequency cycle of sine wave form 00 AF POWER AMPLIFIER amp MODULATOR Class NATURAL COOLING ccs ICAs See next page volts ma watts watts volts volts volts ma ma ohms watts watts volts ma watts watts volts volts volts ma ma ohms watts watts RADIO CORPORATION OF AMERICA Electron Tube Division Harrison N J 833 A POWER TRIODE RF POWER AMPLIFIER Class B Telephony Carrier conditions per tube for use with a max modulation factor of 1 0 NATURAL COOLING ccs ICAS Maximum Ratings Absolute Values DC PLATE VOLTAGE 3000 max 3300 max volts DC PLATE CURRENT sessa 300 max 300 max ma PLATE INPUT 6 S 425 450 max 525 max watts PLATE DISSIPATION 7 300 max 350 max watts Typical Operation with Natural Cooling DC Piate Voltage 3000 3300 volts DC Grid Voltage 70 100 volts Peak RF Grid Voltage 90 110 volts DC Plate Current 150 150 ma DC Grid Current 2 2 ma Driving Power Approx 42. 10 14 watts Power Output Approx 150 200 watts FORCED AIR COOLING ccs ICAs Maximum Ratings Absolute Values DC PLATE VOLTAGE 4000 max 4000 max volts DC PLATE CURRENT 300 300 max PLATE INPUT 4 4 n 600 max 675 max watts PLATE DISSIPATION 4 400 max 450 max watts Typical Operation with Forced Air Cooling DC Plate Voltage 4000 4000 volts OC Grid Voltage 120 120 volts Peak RF Grid Voltage 120 130 volts DC Plate Current 150 150 ma DC Grid Current Approx 2 2 Driving Power Approx 14 21 watts Power Output Approx 225 250 watts PLATE MODULATED RF POWER AMPLIFIER Class C Telephony Carrier conditions per tube for use with a wax modulation factor of 1 0 NATURAL COOLING ccs ICAS Maximum Ratings Absolute Values DC PLATE VOLTAGE y 2500 max 3000 max volts DC GRID VOLTAGE 2 500 max 500 max volts DC PLATE CURRENT 400 max 400 max ma For ac filament supply At crest of audio frequency cycle with modulation factor of 1 0 10 56 TUBE DIVISION DATA 2 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE ccs ICAS DC GRID CURRENT 100 max 100 max mal PLATES cot ter og te 835 max 1000 max watts PLATE DISSIPATION 200 max 250 max watts Typical Operation with Natural C
3. PLANE NORMAL TO THE TUBE AXIS BY THE INTERSECTION OF THE PLANE DETERMINED BY THE AXIS OF THE FILAMENT TERMINALS WITH THE PLANE DETERMINED BY THE AXIS OF THE GRID AND PLATE TERMINALS 15 NOT MORE THAN 5 NOTE 2 THE MOUNTING SHOULD PROVIDE LIBERAL CLEARANCE FOR THIS TIP NOTE 3 THE PLANE THROUGH THE FLAT SIDE OF THE FILAMENT TERMINAL 15 909 7 WITH RESPECT TO THE PLANE THROUGH THE AXES OF THE FILAMENT TERMINALS 10 56 TUBE DIVISION CE 4786R5 RADIO CORPORATION OF AMERICA HARPISON NEW JERSEY 833 A AVERAGE PLATE CHARACTERISTICS BERE PLATE VOLTS PLATE AMPERES TUBE DIVISION 92CM 6196 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A TYPICAL CHARACTERISTICS 10 VOLTS AC 4 GRID AMPERES 500 1000 1500 PLATE VOLTS TUBE DIVISION 92CM 6197 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY
4. and dc grid voltage of 50 volts Note 5 In self excited oscillator circuit and with 10 volts ac on filament dc plate voltage of 4000 volts dc plate current of 450 gridcurrent of 80 to 120 grid resistor of 5000 ohms and frequency of 30 Mc Obtained from agridresistor of the vaiue shown from a combination of grid resistor and cathode resistor Fixed bias operation is not recommended The bias resistor should not be bypassed for the plate and grid voltage supply frequency tt From a driver with a rectified unfiltered single phase full wave plate supply RATINGS vs FREQUENCY WITH NATURAL COOLING FREQUENCY 30 50 75 MAXIMUM PERMISSIBLE PERCENTAGE of MAXIMUM RATED PLATE VOLTAGE and PLATE INPUT Class B telephony 100 98 94 1 Class C telephony 100 90 72 Class C telegraphy 100 90 72 1 RATINGS vs FREQUENCY WITH FORCED AIR COOLING FREQUENCY 20 50 75 Me MAXIMUM PERMISSIBLE PERCENTAGE of MAXIMUM RATED PLATE VOLTAGE and PLATE INPUT Class B telephony 100 97 93 Class C telephony 100 83 65 Class C telegraphy 100 83 65 2 59 DATA 4 ELECTRON TUBE DIVISION RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE 2 TERMINALS JETEC 7 SEE NOTE 6 736 BULB 437 003 2 375 004 TO FLAT w 7 M25 62 MAX MIN 92CM 4786R5 NOTE 1 THE ANGLE FORMED ON
5. 833A Power Triode THORIATED TUNGSTEN F LAMENT RUGGED STRUCTURE ZIRCONIUM COATED ANODE POST TERMINALS 1250 WATTS CW INPUT CCS TO 30 Mc WITH NATURAL COOLING 1800 WATTS CW INPUT CCS TO 20 Mc WITH FORCED AIR COOLING GENERAL DATA Electrical Filament Thoriated Tungsten Voltage 10 5 volts Current at heater volts 10 10 amp Amplification Factor for grid volts 10 and plate ma 200 35 Direct Interelectrode Capacitances Grid to plates 22 55 22 222 20 6 3 Grid to filament wR ae ow 12 3 mi Plate to filament X o 8 5 f Mechanical Operating Position Vertical with filament posts or down Horizontal with plane of electrodes vertical on edge Overall Length 8 5 8 3 16 Maximum 4 19 32 Bulb eis eee ul UR es SO STD T36 Weight 1 lb Terminal Connections See Dimensional Outline G P F Filament FLAT P Plate G Grid F F Thermal Cooling Natural or forced air depending onthe operating conditions Natural Cooling means that adequate free circulation of air around the tube 15 necessary Forced Air Cooling means that an air flow of 40 cfm from a 2 diameter nozzle directed vertically on bulb between grid and plate seals is required to limit temperature between these seals to 145 C Fi
6. E DISSIPATION 400 max 450 max watts Typical Operation with Forced Air Cooling DC Plate Voltage 4000 4000 volts DC Grid Voltage 200 2225 volts From a grid resistor Of 5 2650 2400 ohms From a cathode resistor 380 380 ohms Peak RF Grid Voltage 375 415 volts DC Plate Current 450 500 ma Grid Current 75 95 ma Driving Power 26 35 watts Power Output 1440 1600 watts Subject wide variation depending on tne impedance the load circuit High impedance load circuits requiremore grid current and driving power to obtain the desired output impedance load circuits need less grid current and driving power but plate circuit efficiency is sacrificed The driver stage should nave good regulation and should be capable of delivering considerably more than ihe required driving power Ontained from fixed supply grid resistor cathode resistor or by combination methods aa See next page Indicates a change 10 9 36 TUBE DIVISION DATA 3 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE NOTE When the 833 A isusedin the final amplifier or a preceding stage of a transmitter designed for break in operation and oscillator keying small amount of fixed bias must be used to maintain the plate current at asafevalue With aplate voltage of 4000 v
7. Plate Current qa 240 ma DC Grid Current Approx HELPER 35 Driving Power 14 watts Output Circuit Efficiency Approx 85 4 Useful Power Output 9759 watts bower input to plate is 1 11 times the product of ac plate voltage rms and the dc plate current From self rectified driver See next page Ingicates a change DATA 19 56 TUBE DIVISION 3 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE AMPLIFIER or OSCILLATOR Class C With Separate Rectified Unfiltered Single Phase Full Wave Plate Supply NATURAL COOLING ccs 1 45 Maximum Ratings Absolute Values DC PLATE VOLTAGE 2700 max 3000 DC GRID VOLTAGE 450 450 500 max 500 100 max 100 PLATE INPUTT 1250 max 1500 PLATE DISSIPATION 300 max 350 Typical Operation with Natural Cooling DC Plate Voltage 2500 2750 DC Grid Voltage 130 135 From a grid resistor of 1560 1770 DC Plate Current 450 450 DC Grid Current Approx 83 76 Driving Power Approx ft 27 25 Output Circuit Ef ficiency Approx 85 85 Useful Power Output Approx 935 1020 FORCED AIR COOLING ces Maximum Ratings Absolute Values DC PLATE VOLTAGE 3600 DC GRID VOLTAGE 450 DC PLATE CURRENT 500 DC GR D CURRENT 100 PLATE INPUT 1800 PLATE DISSIPATION 400 Typical Operation with Forced Air C
8. grid resistor with either fixed supply or cathode resistor Key down conditions per tube without amplitude modulation Amplitude modulation essentially negative may be used if the positive peak of the audio frequency envelope does not exceed 115 of the carrier conditions Ust See next page T 10 56 TUBE DIVISION DATA 2 RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE ccs IcAs OC GRID CURRENT 100 max 100 max ma PLATE INPUT e ee 1250 max 1500 max watts PLATE DISSIPATION 300 max 350 max watts Typical Operation with Natural Cooling DC Plate Voltage 2250 3000 3000 3000 volts Grid Voltage eae 125 200 160 155 volts From a grid resistor a 1500 3600 2300 2150 ohms From a cathode 235 425 400 270 ohms Peak RF Grid Voltage 300 360 310 350 volts DC Plate Current 445 415 335 500 ma DC Grid Current Approx Z pubes 85 55 70 70 Driving Power Aperox 9 23 20 20 25 watts Power Output 2 780 1000 800 1150 watts FORCED AIR COOLING ccs 1 45 Maximum Ratings Absolute Values DC PLATE VOLTAGE 4000 max 4000 max volts GRID VOLTAGE 500 max 500 max volts DC PLATE CURRENT oaos 500 max 500 max ma GRID CURRENT 100 max 100 max ma PLATE INPUT a ares 242 1800 max 2000 max watts PLAT
9. olts a fixed bias of at least 90 volts should be used SELF RECTIFYING OSCILLATOR OR AMPLIFIER Class C NATURAL COOLING ccs IcAs Maximum Ratings Absolute Values AC PLATE VOLTAGE RMS 4250 max 4650 max volts DC GRID VOLTAGE 315 max 315 max volts DC PLATE CURRENT 250 max 250 max ma DC GRID CURRENT 50 max 50 max ma PLATE INPUT 1180 max 1290 max watts PLATE DISSIPATION wa foe vet 300 max 350 max watts Typical Operation with Natural Cooling AC Plate Vol tage RMS 4000 4400 volts DC Grid Voltage 80 85 volts From a grid resistor of 2200 2400 ohms Plate Current 240 240 ma DC Grid Current Approx 37 36 ma Driving Power Approx 13 13 5 watts Output Circuit Ef ficiency 85 85 Useful Power Output 710 800 watts FORCED AIR COOLING 65 Maximum Ratings Absolute Values AC PLATE VOLTAGE RMS 5650 max volt GRID 315 volts DG PLATE CURRENT Ge N 250 max ma DG GRID CURRENT 50 max me PLATE INPUT x k URS en et 1570 max watts PLATE DISSIPATION wow 400 max watts Typical Operation with Forced Air Cooling AC Plate Voltage 5300 volts Grid Voltage eee ee 97 volts From a grid resistor of vu 2700 ohms DC
10. ooling DC Plate Voltage 3300 DC Grid Voltages 155 From a grid resistor of 2100 DC Plate Current 0C Grid Current Approx Driving Power Approx tt Output Circuit Efficiency Approx Useful Power Output Aporox x Continuous Commercial Service 99 Intermittent Commercial and Amateur Service Power input to plate is 1 23 times the product of dc plate voltage times plate current This value of useful power is measuredat load of output circuit having the indicated efficiency t See next page Indicates a change DATA 4 2 59 ELECTRON TUBE DIVISION RADIO CORPORATION OF AMERICA HARRISON NEW JERSEY 833 A POWER TRIODE CHARACTERISTICS RANGE VALUES FOR EQUIPMENT DESIGN Note Min Max Filament Current 1 9 4 10 6 amp Direct Interelectrode Capacitances Grid to plate 5 5 7 1 Grid to filament 10 1 14 5 uat Plate to filament 6 4 10 6 Amplification Factor 2 31 5 38 5 Grid Current 3 160 380 ma Plate Current 1 3 490 810 ma Plate Current 2 4 60 140 ma Power Output 5 1150 watts Note 1 With 10 volts dc on filament Note 2 With 10 volts ac on filament dc grid voltage of 10 volts and dc plate voltage adjusted to give dc plate current of 200 ma Note 3 With 10 volts ac on filament dc plate voltage of 100 volts and dc grid voltage of 100 volts Note 4 With 10 volts ac filament dc plate voltage of 2500 volts
11. ooling DC Plate Voltage 2500 3000 volts DC Grid Voltage x 300 240 volts From a grid resistor of s 4000 3400 ohms Peak Grid Voltage 460 410 volts DC Plate Current 335 335 ma DC Grid Current Approx 75 70 ma Driving Power Approx 9 30 26 watts Power Output 635 800 watts FORCED AIR COOLING ccs Icas Maximum Ratings Absolute Values DC PLATE VOLTAGE 3000 max 4000 max volts GRID VOLTAGE 500 max 500 max volts DC PLATE CURRENT 450 max 450 max ma DC GRID CURRENT 100 max 100 max ma PLATE INPUT NP 1250 max 1800 max watts PLATE DISSIPATION 2222 270 max 350 max watts Typical Operation with Forced Air Cooling DC Plate Voltage 3000 4000 volts DC Grid Voltage 300 325 volts From a grid resistor of n 3600 3600 ohms Peak RF Grid Voltage 490 520 volts DC Plate Current 415 450 ma DC Grid Current Approx 9 85 90 ma Driving Power Approx 8 37 42 watts Power Output 1000 1500 watts RF POWER AMPLIFIER OSCILLATOR Class C Telegraphy and RF POWER AMPLIFIER Class C FM Telephony NATURAL COOLING ccs rcas Maximum Ratings Absolute Values DC PLATE VOLTAGE 3000 max 3300 max volts DC GRID VOLTAGE 500 max 500 max volts DC PLATE CURRENT 500 max 500 max ma Obtained by grid resistor or from combination of
12. ttings Johnson E F Johnson Company Waseca Minn Assembly Cat No 124 212 consisting of ceramic mounting for filament end and two heat radiating connectors forgrid and plate terminals e 1 See next Indicates a change RADIO CORPORATION OF AMERICA DATA Electron Tube Division Harrison N J 9 62 833A Maximum Ratings Absolute Maximum Values DC PLATE 1 3000 max 3300 max MAX SIGNAL DC PLATE CURRENT 500 max 500 max MAX SIGNAL PLATE INPUT 1125 max 1300 max PLATE DISSIPATION s ox 300 max 350 max Typical Operation with Natural Cooling Vaiues are for 2 tubes DC Plate Voltage 3000 3300 DC Grid Voltage S10 80 Peak AF Grid to Grid Voltage 400 440 Zero Signal DC Plate Current 100 100 Max Signal DC Plate Current 750 780 Effective Load Resistance Plate to plate ae 9500 10500 Max Signal Driving Power zx 100 30 Max Signal Power Output ve 371650 1900 FORCED AIR COOLING ccs IcAs Maximum Ratings Absolute Maximum Values DC PLATE VOLTAGE 4000 max 4000 max MAX SIGNAL DC PLATE CURRENT 500 max 500 max MAX SIGNAL PLATE INPUT 1600 max 1800 max PLATE DISSIPATION 54 58 0825 400 max 450 max Typical Operation with Forced Air Cooling Values are for 2 tubes DC Plate Voltage 4000 4000 DC Grid
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