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813
Beam Power Pentode

EIA Base & Outline

EIA Base: 5BAEIA Bulb: 20-1
Source ........................................ RCA TT-5 - 1962/RCA DS 04/55

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

Bulb .......................................... T-20
Base Type ..................................... Medium Metal Shell Giant 7-Pin with Bayonet
EIA Outline ................................... 20-1
EIA Base ...................................... 5BA
Top Cap ....................................... Medium C1-5
Cathode ....................................... Thoriated Tungsten
Mounting Position ............................. Vertical base up or down and horizontal with pins 2 & 6 in vertical plane

Electrical Data

Heater Voltage ................................ 10 V
Heater Current ................................ 5 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 16.3 pf
Output ........................................ 14 pf
Grid to Plate ................................. 0.25 pf

Maximum Ratings (Design Center Values)

AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 2250 V
Grid No. 2 Voltage ............................ 1100 V
Plate Input ................................... 360 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 22 W
Plate Current ................................. 180 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 2500 V
Grid No. 2 Voltage ............................ 1100 V
Plate Input ................................... 450 W
Plate Dissipation ............................. 125 W
Grid No. 2 Dissipation ........................ 22 W
Plate Current ................................. 225 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

RF Power Amplifier - Class B (CCS)
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 400 V
Plate Input ................................... 150 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 15 W
Plate Current ................................. 100 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

RF Power Amplifier - Class B (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 2 Voltage ............................ 400 V
Plate Input ................................... 200 W
Plate Dissipation ............................. 125 W
Grid No. 2 Dissipation ........................ 20 W
Plate Current ................................. 125 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Grid-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -200 V
Plate Input ................................... 150 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 15 W
Plate Current ................................. 100 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Grid-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -200 V
Plate Input ................................... 200 W
Plate Dissipation ............................. 125 W
Grid No. 2 Dissipation ........................ 20 W
Plate Current ................................. 125 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1600 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 240 W
Plate Dissipation ............................. 67 W
Grid No. 2 Dissipation ........................ 15 W
Plate Current ................................. 150 mA
Grid Current .................................. 25 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Plate-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 400 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 20 W
Plate Current ................................. 200 mA
Grid Current .................................. 30 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 360 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 22 W
Plate Current ................................. 180 mA
Grid Current .................................. 25 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 500 W
Plate Dissipation ............................. 125 W
Grid No. 2 Dissipation ........................ 22 W
Plate Current ................................. 225 mA
Grid Current .................................. 30 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Push Pull Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1600 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 240 W
Plate Dissipation ............................. 67 W
Grid No. 2 Dissipation ........................ 15 W
Plate Current ................................. 150 mA
Grid Current .................................. 25 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Push Pull Plate-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2000 V
Grid No. 2 Voltage ............................ 400 V
Negative Grid No. 1 Voltage ................... -300 V
Plate Input ................................... 400 W
Plate Dissipation ............................. 100 W
Grid No. 2 Dissipation ........................ 20 W
Plate Current ................................. 200 mA
Grid Current .................................. 30 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω

Characteristics and Typical Operation

Push Pull Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 27K Ω
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 12.5K Ω
Peak Grid No. 1 Voltage........................ 250 V
Grid No. 1 Current ............................ 13 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 35 mA
Driving Power ................................. 2.9 W
Power Output (approx) ......................... 140 W

Push Pull Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1600 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 43K Ω
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 13.5K Ω
Peak Grid No. 1 Voltage........................ 250 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 30 mA
Driving Power ................................. 2.7 W
Power Output (approx) ......................... 180 W

Push Pull Plate-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 350 V
Grid No. 2 Dropping Resistor .................. 41K Ω
Grid No. 1 Voltage ............................ -175 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 11K Ω
Peak Grid No. 1 Voltage........................ 300 V
Grid No. 1 Current ............................ 16 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 40 mA
Driving Power ................................. 4.3 W
Power Output (approx) ......................... 300 W

RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 27K Ω
Grid No. 1 Voltage ............................ -75 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 6K Ω
Cathode Bias Resistor ...................... 330 Ω
Peak Grid No. 1 Voltage........................ 160 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 180 mA
Grid No. 2 Current ............................ 35 mA
Driving Power ................................. 1.7 W
Power Output (approx) ......................... 170 W
Maximum Frequency ............................. 30 MHz

RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 40K Ω
Grid No. 1 Voltage ............................ -90 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 7.5K Ω
Cathode Bias Resistor ...................... 400 Ω
Peak Grid No. 1 Voltage........................ 175 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 180 mA
Grid No. 2 Current ............................ 30 mA
Driving Power ................................. 1.9 W
Power Output (approx) ......................... 210 W
Maximum Frequency ............................. 30 MHz

RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 2 Dropping Resistor .................. 36K Ω
Grid No. 1 Voltage ............................ -120 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 12K Ω
Cathode Bias Resistor ...................... 520 Ω
Peak Grid No. 1 Voltage........................ 205 V
Grid No. 1 Current ............................ 10 mA
Plate Current ................................. 180 mA
Grid No. 2 Current ............................ 45 mA
Driving Power ................................. 1.9 W
Power Output (approx) ......................... 275 W
Maximum Frequency ............................. 30 MHz

RF Power Amplifier & Oscillator - Class C (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 2 Dropping Resistor .................. 46K Ω
Grid No. 1 Voltage ............................ -155 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 10K Ω
Cathode Bias Resistor ...................... 565 Ω
Peak Grid No. 1 Voltage........................ 275 V
Grid No. 1 Current ............................ 15 mA
Plate Current ................................. 220 mA
Grid No. 2 Current ............................ 40 mA
Driving Power ................................. 4 W
Power Output (approx) ......................... 375 W
Maximum Frequency ............................. 30 MHz

Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -85 V
Peak Grid No. 1 Voltage........................ 160 V
Grid No. 1 Current ............................ 0 mA
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 W
Load Resistance ............................... 9.3K Ω
Power Output (approx) ......................... 260 W

Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -90 V
Peak Grid No. 1 Voltage........................ 160 V
Grid No. 1 Current ............................ 0 mA
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 W
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 335 W

Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 2250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -95 V
Peak Grid No. 1 Voltage........................ 170 V
Grid No. 1 Current ............................ 0 mA
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 W
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 380 W

Push Pull AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 2500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -95 V
Peak Grid No. 1 Voltage........................ 180 V
Grid No. 1 Current ............................ 0 mA
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 W
Load Resistance ............................... 19K Ω
Power Output (approx) ......................... 490 W

RF Power Amplifier - Class B (CCS)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -60 V
Peak Grid No. 1 Voltage........................ 70 V
Plate Current ................................. 100 mA
Grid No. 2 Current ............................ 4 mA
Power Output (approx) ......................... 50 W
Maximum Frequency ............................. 30 MHz

RF Power Amplifier - Class B (CCS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -75 V
Peak Grid No. 1 Voltage........................ 80 V
Plate Current ................................. 75 mA
Grid No. 2 Current ............................ 3 mA
Power Output (approx) ......................... 50 W
Maximum Frequency ............................. 30 MHz

RF Power Amplifier - Class B (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -60 V
Peak Grid No. 1 Voltage........................ 70 V
Plate Current ................................. 85 mA
Grid No. 2 Current ............................ 3 mA
Power Output (approx) ......................... 70 W
Maximum Frequency ............................. 30 MHz

Grid-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -140 V
Peak Grid No. 1 Voltage........................ 145/60 V
Plate Current ................................. 70 mA
Grid No. 2 Current ............................ 3 mA
Power Output (approx) ......................... 40 W
Maximum Frequency ............................. 30 MHz

Grid-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -120 V
Peak Grid No. 1 Voltage........................ 120/60 V
Plate Current ................................. 75 mA
Grid No. 2 Current ............................ 3 mA
Power Output (approx) ......................... 50 W
Maximum Frequency ............................. 30 MHz

Grid-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 400 V
Grid No. 1 Voltage ............................ -110 V
Peak Grid No. 1 Voltage........................ 135/55 V
Plate Current ................................. 85 mA
Grid No. 2 Current ............................ 2.5 mA
Power Output (approx) ......................... 75 W
Maximum Frequency ............................. 30 MHz

Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 27K Ω
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 12.5K Ω
Peak Grid No. 1 Voltage........................ 250 V
Grid No. 1 Current ............................ 13 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 35 mA
Driving Power ................................. 2.9 W
Power Output (approx) ......................... 140 W
Maximum Frequency ............................. 30 MHz

Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 1600 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 2 Dropping Resistor .................. 43K Ω
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 13.5K Ω
Peak Grid No. 1 Voltage........................ 250 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............................ 30 mA
Driving Power ................................. 2.7 W
Power Output (approx) ......................... 180 W
Maximum Frequency ............................. 30 MHz

Plate-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 350 V
Grid No. 2 Dropping Resistor .................. 41K Ω
Grid No. 1 Voltage ............................ -175 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 11K Ω
Peak Grid No. 1 Voltage........................ 300 V
Grid No. 1 Current ............................ 16 mA
Plate Current ................................. 200 mA
Grid No. 2 Current ............................ 40 mA
Driving Power ................................. 4.3 W
Power Output (approx) ......................... 300 W
Maximum Frequency ............................. 30 MHz

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 2000 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -90 V
Peak Grid No. 1 Voltage........................ 230 V
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 W
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 455 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 2500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -95 V
Peak Grid No. 1 Voltage........................ 235 V
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 W
Load Resistance ............................... 17K Ω
Power Output (approx) ......................... 650 W

Class AB2 Amplifier
Plate Voltage ................................. 2250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -90 V
Peak Grid No. 1 Voltage........................ 115 V
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 W
Power Output (approx) ......................... 258 W

Class AB2 Amplifier
Plate Voltage ................................. 2500 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 750 V
Grid No. 1 Voltage ............................ -95 V
Peak Grid No. 1 Voltage........................ 118 V
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 W
Power Output (approx) ......................... 325 W

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Tue, 09 Aug 2022 07:52:40 -0700