ΠΙΣΩ

6146W
Beam Power Pentode

Data Source and Substitute Data

Data Source ................................... RCA DS 07/63
Preferred Substitutes ......................... 7212
Substitutes ................................... 6146B 8298 8298A

Application

Small, sturdy, glass-octal heater cathode type used as af power amplifier and modulator and as rf power amplifer and oscillator.May be used with full input up to 60 MHz and with reduced input up to 175 MHz. Class C telegraphy maximum plate dissipation, CCS 20 Wattts, ICAS 25 Watts.

Mechanical Data

Bulb .......................................... T-12
Base .......................................... Large Wafer Octal 8-Pin
Outline ....................................... 12-33
EIA Base ...................................... 7CK
Top Cap ....................................... Small C1-1
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.125 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 13 pf
Output ........................................ 8.5 pf
Grid to Plate ................................. 0.22 pf

Maximum Ratings (Design Center Values)

Plate-Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 480 V
Grid No. 2 Voltage ............................ 250 V
Negative Grid No. 1 Voltage ................... -150 V
Plate Input ................................... 45 W
Plate Dissipation ............................. 13.3 W
Grid No. 2 Dissipation ........................ 2 W
Plate Current ................................. 117 mA
Grid Current .................................. 3.5 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
Plate-Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Negative Grid No. 1 Voltage ................... -150 V
Plate Input ................................... 67.5 W
Plate Dissipation ............................. 16.7 W
Grid No. 2 Dissipation ........................ 2 W
Plate Current ................................. 125 mA
Grid Current .................................. 4.0 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 60 W
Plate Dissipation ............................. 20 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 125 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 100K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 85 W
Plate Dissipation ............................. 25 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 135 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 100K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 62.5 W
Plate Dissipation ............................. 20 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 125 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 90 W
Plate Dissipation ............................. 25 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 135 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Negative Grid No. 1 Voltage ................... -150 V
Plate Input ................................... 67.5 W
Plate Dissipation ............................. 20 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 140 mA
Grid Current .................................. 3.5 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C
RF Power Amplifier & Oscillator - Class C (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Negative Grid No. 1 Voltage ................... -150 V
Plate Input ................................... 90 W
Plate Dissipation ............................. 25 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 150 mA
Grid Current .................................. 4.0 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 220 °C

Characteristics and Typical Operation

Plate Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 2 Dropping Resistor .................. 33K Ω
Grid No. 1 Voltage ............................ -87 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor .......................... 27K Ω
Peak Grid No. 1 Voltage........................ 107 V
Grid No. 1 Current ............................ 3.4 mA
Plate Current ................................. 112 mA
Grid No. 2 Current ............. .............. 7.8 mA
Driving Power ................................. 0.4 W
Power Output (approx) ......................... 32 W
Plate Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 475 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 2 Dropping Resistor .................. 51K Ω
Grid No. 1 Voltage ............................ -77 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 27K Ω
Peak Grid No. 1 Voltage........................ 95 V
Grid No. 1 Current ............................ 2.8 mA
Plate Current ................................. 94 mA
Grid No. 2 Current ............. .............. 6.4 mA
Driving Power ................................. 0.3 W
Power Output (approx) ......................... 34 W
Plate Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 2 Dropping Resistor .................. 56K Ω
Grid No. 1 Voltage ............................ -87 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 28K Ω
Peak Grid No. 1 Voltage........................ 107 V
Grid No. 1 Current ............................ 3.4 mA
Plate Current ................................. 112 mA
Grid No. 2 Current ............. .............. 7.8 mA
Driving Power ................................. 0.4 W
Power Output (approx) ......................... 52 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 190 V
Grid No. 1 Voltage ............................ -40 V
Peak Grid No. 1 Voltage........................ 80 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 63 mA
Plate Current (Maximum Signal) ................ 228 mA
Grid No. 2 Current (Zero Signal) .............. 2.5 mA
Grid No. 2 Current (Maximum Signal) ........... 25 mA
Driving Power ................................. 0 W
Load Resistance ............................... 4K Ω
Power Output (approx) ......................... 55 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 185 V
Grid No. 1 Voltage ............................ -40 V
Peak Grid No. 1 Voltage........................ 80 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 57 mA
Plate Current (Maximum Signal) ................ 215 mA
Grid No. 2 Current (Zero Signal) .............. 2 mA
Grid No. 2 Current (Maximum Signal) ........... 25 mA
Driving Power ................................. 0 W
Load Resistance ............................... 5.5K Ω
Power Output (approx) ......................... 70 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 180 V
Grid No. 1 Voltage ............................ -45 V
Peak Grid No. 1 Voltage........................ 90 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 26 mA
Plate Current (Maximum Signal) ................ 200 mA
Grid No. 2 Current (Zero Signal) .............. 1 mA
Grid No. 2 Current (Maximum Signal) ........... 23 mA
Driving Power ................................. 0 W
Load Resistance ............................... 7K Ω
Power Output (approx) ......................... 82 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 100 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 28 mA
Plate Current (Maximum Signal) ................ 229 mA
Grid No. 2 Current (Zero Signal) .............. 1 mA
Grid No. 2 Current (Maximum Signal) ........... 27 mA
Driving Power ................................. 0 W
Load Resistance ............................... 6K Ω
Power Output (approx) ......................... 95 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 195 V
Grid No. 1 Voltage ............................ -50 V
Peak Grid No. 1 Voltage........................ 100 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 23 mA
Plate Current (Maximum Signal) ................ 220 mA
Grid No. 2 Current (Zero Signal) .............. 1 mA
Grid No. 2 Current (Maximum Signal) ........... 26 mA
Driving Power ................................. 0 W
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 120 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 175 V
Grid No. 1 Voltage ............................ -41 V
Peak Grid No. 1 Voltage........................ 95 V
Grid No. 1 Current ............................ 1.6 mA
Plate Current (Zero Signal) ................... 33 mA
Plate Current (Maximum Signal) ................ 232 mA
Grid No. 2 Current (Zero Signal) .............. 1.1 mA
Grid No. 2 Current (Maximum Signal) ........... 18 mA
Driving Power ................................. 0.2 W
Load Resistance ............................... 3.7K Ω
Power Output (approx) ......................... 62 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 175 V
Grid No. 1 Voltage ............................ -44 V
Peak Grid No. 1 Voltage........................ 102 V
Grid No. 1 Current ............................ 1.9 mA
Plate Current (Zero Signal) ................... 27 mA
Plate Current (Maximum Signal) ................ 242 mA
Grid No. 2 Current (Zero Signal) .............. 0.7 mA
Grid No. 2 Current (Maximum Signal) ........... 18 mA
Driving Power ................................. 0.3 W
Load Resistance ............................... 4.6K Ω
Power Output (approx) ......................... 83 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 165 V
Grid No. 1 Voltage ............................ -44 V
Peak Grid No. 1 Voltage........................ 97 V
Grid No. 1 Current ............................ 1.1 mA
Plate Current (Zero Signal) ................... 22 mA
Plate Current (Maximum Signal) ................ 207 mA
Grid No. 2 Current (Zero Signal) .............. 0.6 mA
Grid No. 2 Current (Maximum Signal) ........... 17 mA
Driving Power ................................. 0.2 W
Load Resistance ............................... 6.8K Ω
Power Output (approx) ......................... 90 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 190 V
Grid No. 1 Voltage ............................ -48 V
Peak Grid No. 1 Voltage........................ 109 V
Grid No. 1 Current ............................ 2.0 mA
Plate Current (Zero Signal) ................... 28 mA
Plate Current (Maximum Signal) ................ 270 mA
Grid No. 2 Current (Zero Signal) .............. 1.2 mA
Grid No. 2 Current (Maximum Signal) ........... 20 mA
Driving Power ................................. 0.3 W
Load Resistance ............................... 5K Ω
Power Output (approx) ......................... 113 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 165 V
Grid No. 1 Voltage ............................ -46 V
Peak Grid No. 1 Voltage........................ 108 V
Grid No. 1 Current ............................ 2.6 mA
Plate Current (Zero Signal) ................... 22 mA
Plate Current (Maximum Signal) ................ 240 mA
Grid No. 2 Current (Zero Signal) .............. 0.3 mA
Grid No. 2 Current (Maximum Signal) ........... 20 mA
Driving Power ................................. 0.4 W
Load Resistance ............................... 7.4K Ω
Power Output (approx) ......................... 131 W
RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 170 V
Grid No. 2 Dropping Resistor .................. 36K Ω
Grid No. 1 Voltage ............................ -66 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 27K Ω
Cathode Bias Resistor ....................... 470 Ω
Peak Grid No. 1 Voltage........................ 84 V
Grid No. 1 Current ............................ 2.5 mA
Plate Current ................................. 135 mA
Grid No. 2 Current ............. .............. 9 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 48 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 2 Dropping Resistor .................. 51K Ω
Grid No. 1 Voltage ............................ -58 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 20K Ω
Cathode Bias Resistor ....................... 470 Ω
Peak Grid No. 1 Voltage........................ 73 V
Grid No. 1 Current ............................ 2.8 mA
Plate Current ................................. 112 mA
Grid No. 2 Current ............. .............. 9 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 52 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 180 V
Grid No. 2 Dropping Resistor .................. 43K Ω
Grid No. 1 Voltage ............................ -71 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 24K Ω
Cathode Bias Resistor ....................... 430 Ω
Peak Grid No. 1 Voltage........................ 91 V
Grid No. 1 Current ............................ 2.8 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............. .............. 10 mA
Driving Power ................................. 0.3 W
Power Output (approx) ......................... 66 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 160 V
Grid No. 2 Dropping Resistor .................. 56K Ω
Grid No. 1 Voltage ............................ -62 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 20K Ω
Cathode Bias Resistor ....................... 470 Ω
Peak Grid No. 1 Voltage........................ 79 V
Grid No. 1 Current ............................ 3.1 mA
Plate Current ................................. 120 mA
Grid No. 2 Current ............. .............. 11 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 70 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C at 175 MHz (CCS)
Plate Voltage ................................. 320 V
Grid No. 2 Voltage ............................ 180 V
Grid No. 2 Dropping Resistor .................. 13K Ω
Grid No. 1 Voltage ............................ -51 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 27K Ω
Cathode Bias Resistor ....................... 330 Ω
Peak Grid No. 1 Voltage........................ 64 V
Grid No. 1 Current ............................ 2.0 mA
Plate Current ................................. 140 mA
Grid No. 2 Current ............. .............. 10.0 mA
Driving Power ................................. 3.0 W
Power Output (approx) ......................... 25 W
Maximum Frequency ............................. 175 MHz
RF Power Amplifier & Oscillator - Class C at 175 MHz (ICAS)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 190 V
Grid No. 2 Dropping Resistor .................. 20K Ω
Grid No. 1 Voltage ............................ -54 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ......................... 24K Ω
Cathode Bias Resistor ....................... 330 Ω
Peak Grid No. 1 Voltage........................ 68 V
Grid No. 1 Current ............................ 2.2 mA
Plate Current ................................. 150 mA
Grid No. 2 Current ............. .............. 10.4 mA
Driving Power ................................. 3.0 W
Power Output (approx) ......................... 35 W
Maximum Frequency ............................. 175 MHz

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