813 Beam
Power Pentode
Application
Thoriated-tungsten-filament type used as af power amplifier and modulator and as rf power amplifier and oscillator. Requires giant seven-contact socket and may be operated in vertical position base up or down, or in horizontal position with pins 2 and 6 in vertical plane.
Mechanical Data
Outline ....................................... 20-1
EIA Base ...................................... 5BA
Electrical Data
Heater Characteristics
Heater Voltage ................................ 10 Volts
Heater Current ................................ 5 Amperes
Direct Interelectrode Capacitances (approx)
Pentode
Input ......................................... 16.3 pf
Output ........................................ 14 pf
Grid to Plate ................................. 0.25 pf
Maximum Ratings (Design Center Values)Pentode
Plate Voltage ................................. 2500 Volts
Grid No. 2 Voltage ............................ 800 Volts
Plate Dissipation ............................. 125 Watts
Grid No. 2 Dissipation ........................ 20 Watts
Characteristics and Typical OperationPush Pull Class C Modulated Amplifier (Plate - CCS)
Plate Voltage ................................. 1600 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 300 Volts
Grid No. 2 Dropping Resistor .................. 43K Ohms
Grid No. 1 Voltage ............................ -160 Volts
Peak Grid No. 1 Voltage ....................... 250 Volts
Grid No. 1 Current ............................ 12 Ma.
Plate Current (Zero Signal) ................... 150 Ma.
Grid No. 2 Current (Zero Signal) .............. 30 Ma.
Driving Power ................................. 2.7 Watts
Power Output (approx) ......................... 180 Watts
Push Pull Class C Modulated Amplifier (Plate - CCS)
Plate Voltage ................................. 1250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 300 Volts
Grid No. 2 Dropping Resistor .................. 27K Ohms
Grid No. 1 Voltage ............................ -160 Volts
Peak Grid No. 1 Voltage ....................... 250 Volts
Grid No. 1 Current ............................ 13 Ma.
Plate Current (Zero Signal) ................... 150 Ma.
Grid No. 2 Current (Zero Signal) .............. 35 Ma.
Driving Power ................................. 2.9 Watts
Power Output (approx) ......................... 140 Watts
Push Pull Class C Modulated Amplifier (Plate - ICAS)
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 350 Volts
Grid No. 2 Dropping Resistor .................. 41K Ohms
Grid No. 1 Voltage ............................ -175 Volts
Peak Grid No. 1 Voltage ....................... 300 Volts
Grid No. 1 Current ............................ 16 Ma.
Plate Current (Zero Signal) ................... 200 Ma.
Grid No. 2 Current (Zero Signal) .............. 40 Ma.
Driving Power ................................. 4.3 Watts
Power Output (approx) ......................... 300 Watts
Class C Oscillator/Amplifier (CCS)
Plate Voltage ................................. 1250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 300 Volts
Grid No. 2 Dropping Resistor .................. 27K Ohms
Grid No. 1 Voltage ............................ -75 Volts
Peak Grid No. 1 Voltage ....................... 160 Volts
Grid No. 1 Current ............................ 12 Ma.
Plate Current (Zero Signal) ................... 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 35 Ma.
Driving Power ................................. 1.7 Watts
Power Output (approx) ......................... 170 Watts
Class C Oscillator/Amplifier (CCS)
Plate Voltage ................................. 1500 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 300 Volts
Grid No. 2 Dropping Resistor .................. 40K Ohms
Grid No. 1 Voltage ............................ -90 Volts
Peak Grid No. 1 Voltage ....................... 175 Volts
Grid No. 1 Current ............................ 12 Ma.
Plate Current (Zero Signal) ................... 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 30 Ma.
Driving Power ................................. 1.9 Watts
Power Output (approx) ......................... 210 Watts
Class C Oscillator/Amplifier (CCS)
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 400 Volts
Grid No. 2 Dropping Resistor .................. 36K Ohms
Grid No. 1 Voltage ............................ -120 Volts
Peak Grid No. 1 Voltage ....................... 205 Volts
Grid No. 1 Current ............................ 10 Ma.
Plate Current (Zero Signal) ................... 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 45 Ma.
Driving Power ................................. 1.9 Watts
Power Output (approx) ......................... 275 Watts
Class C Oscillator/Amplifier (ICAS)
Plate Voltage ................................. 2250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 400 Volts
Grid No. 2 Dropping Resistor .................. 46K Ohms
Grid No. 1 Voltage ............................ -155 Volts
Peak Grid No. 1 Voltage ....................... 275 Volts
Grid No. 1 Current ............................ 15 Ma.
Plate Current (Zero Signal) ................... 220 Ma.
Grid No. 2 Current (Zero Signal) .............. 40 Ma.
Driving Power ................................. 4 Watts
Power Output (approx) ......................... 375 Watts
Push Pull Class AB1 Amplifier (CCS)
Plate Voltage ................................. 1500 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -85 Volts
Peak Grid No. 1 Voltage ....................... 160 Volts
Plate Current (Zero Signal) ................... 50 Ma.
Plate Current (Maximum Signal) ................ 305 Ma.
Grid No. 2 Current (Zero Signal) .............. 2 Ma.
Grid No. 2 Current (Maximum Signal) ........... 45 Ma.
Driving Power ................................. 0 Watts
Load Resistance ............................... 9.3K Ohms
Power Output (approx) ......................... 260 Watts
Push Pull Class AB1 Amplifier (CCS)
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -90 Volts
Peak Grid No. 1 Voltage ....................... 160 Volts
Plate Current (Zero Signal) ................... 50 Ma.
Plate Current (Maximum Signal) ................ 265 Ma.
Grid No. 2 Current (Zero Signal) .............. 2 Ma.
Grid No. 2 Current (Maximum Signal) ........... 43 Ma.
Driving Power ................................. 0 Watts
Load Resistance ............................... 16K Ohms
Power Output (approx) ......................... 335 Watts
Push Pull Class AB1 Amplifier (CCS)
Plate Voltage ................................. 2250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -95 Volts
Peak Grid No. 1 Voltage ....................... 170 Volts
Plate Current (Zero Signal) ................... 50 Ma.
Plate Current (Maximum Signal) ................ 255 Ma.
Grid No. 2 Current (Zero Signal) .............. 2 Ma.
Grid No. 2 Current (Maximum Signal) ........... 53 Ma.
Driving Power ................................. 0 Watts
Load Resistance ............................... 20K Ohms
Power Output (approx) ......................... 380 Watts
Push Pull Class AB1 Amplifier (ICAS)
Plate Voltage ................................. 2500 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -95 Volts
Peak Grid No. 1 Voltage ....................... 180 Volts
Plate Current (Zero Signal) ................... 50 Ma.
Plate Current (Maximum Signal) ................ 290 Ma.
Grid No. 2 Current (Zero Signal) .............. 2 Ma.
Grid No. 2 Current (Maximum Signal) ........... 54 Ma.
Driving Power ................................. 0 Watts
Load Resistance ............................... 19K Ohms
Power Output (approx) ......................... 490 Watts
Class C Oscillator/Amplifier
Plate Voltage ................................. 1250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 300 Volts
Grid No. 1 Voltage ............................ -75 Volts
Grid No. 1 Current ............................ 12 Ma.
Plate Current (Zero Signal) ................... 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 35 Ma.
Driving Power ................................. 1.7 Watts
Power Output (approx) ......................... 170 Watts
Class C Amplifier
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 400 Volts
Grid No. 1 Voltage ............................ -90 Volts
Grid No. 1 Current ............................ 3 Ma.
Plate Current (Zero Signal) ................... 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 15 Ma.
Driving Power ................................. 0.5 Watts
Power Output (approx) ......................... 260 Watts
Push Pull Class AB2 Amplifier
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -90 Volts
Peak Grid No. 1 Voltage ....................... 230 Volts
Plate Current (Zero Signal) ................... 40 Ma.
Plate Current (Maximum Signal) ................ 315 Ma.
Grid No. 2 Current (Zero Signal) .............. 1.5 Ma.
Grid No. 2 Current (Maximum Signal) ........... 58 Ma.
Driving Power ................................. 0.1 Watts
Load Resistance ............................... 16K Ohms
Power Output (approx) ......................... 455 Watts
Push Pull Class AB2 Amplifier
Plate Voltage ................................. 2500 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -95 Volts
Peak Grid No. 1 Voltage ....................... 235 Volts
Plate Current (Zero Signal) ................... 35 Ma.
Plate Current (Maximum Signal) ................ 360 Ma.
Grid No. 2 Current (Zero Signal) .............. 1.2 Ma.
Grid No. 2 Current (Maximum Signal) ........... 55 Ma.
Driving Power ................................. 0.35 Watts
Load Resistance ............................... 17K Ohms
Power Output (approx) ......................... 650 Watts
Class AB2 Amplifier
Plate Voltage ................................. 2250 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -90 Volts
Peak Grid No. 1 Voltage ....................... 115 Volts
Plate Current (Zero Signal) ................... 23 Ma.
Plate Current (Maximum Signal) ................ 158 Ma.
Grid No. 2 Current (Zero Signal) .............. 0.8 Ma.
Grid No. 2 Current (Maximum Signal) ........... 29 Ma.
Driving Power ................................. 0.1 Watts
Power Output (approx) ......................... 258 Watts
Class AB2 Amplifier
Plate Voltage ................................. 2500 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 750 Volts
Grid No. 1 Voltage ............................ -95 Volts
Peak Grid No. 1 Voltage ....................... 118 Volts
Plate Current (Zero Signal) ................... 18 Ma.
Plate Current (Maximum Signal) ................ 180 Ma.
Grid No. 2 Current (Zero Signal) .............. 0.6 Ma.
Grid No. 2 Current (Maximum Signal) ........... 28 Ma.
Driving Power ................................. 0.2 Watts
Power Output (approx) ......................... 325 Watts
Class C Modulated Amplifier (Grid)
Plate Voltage ................................. 2000 Volts
Grid No. 3 Voltage ............................ 0 Volts
Grid No. 2 Voltage ............................ 400 Volts
Grid No. 1 Voltage ............................ -120 Volts
Plate Current (Zero Signal) ................... 75 Ma.
Grid No. 2 Current (Zero Signal) .............. 3 Ma.
Power Output (approx) ......................... 50 Watts
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