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Preferred Substitutes ......................... 8298A
Substitutes ................................... 6146 6146A 6146W 8298
Source ........................................ RCA DS 02/64
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 30 Wattts, ICAS 35 Watts.
Bulb .......................................... T-12
Base Type ..................................... Large Wafer Octal 8-Pin
EIA Outline ................................... 12-33
EIA Base ...................................... 7CK
Top Cap ....................................... Small C1-1
Cathode ....................................... Dark Heater
Mounting Position ............................. Any
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.125 A
Heater Warm-up Time ........................... 60 s
Maximum Heater-Cathode Voltage ................ 135 V
Pentode
Input ......................................... 13 pf
Output ........................................ 8.5 pf
Grid to Plate ................................. 0.22 pf
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 ................................... 60 W
Plate Dissipation ............................. 18 W
Grid No. 2 Dissipation ........................ 2 W
Plate Current ................................. 145 mA
Grid Current .................................. 3.5 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °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 ................................... 85 W
Plate Dissipation ............................. 23 W
Grid No. 2 Dissipation ........................ 2 W
Plate Current ................................. 250 mA
Grid Current .................................. 4.0 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 90 W
Plate Dissipation ............................. 27 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 175 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 100K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 120 W
Plate Dissipation ............................. 35 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 220 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 100K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 90 W
Plate Dissipation ............................. 27 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 175 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Plate Input ................................... 120 W
Plate Dissipation ............................. 35 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 220 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °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 ................................... 90 W
Plate Dissipation ............................. 27 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 175 mA
Grid Current .................................. 3.5 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °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 ................................... 120 W
Plate Dissipation ............................. 35 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 220 mA
Grid Current .................................. 4.0 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
Linear RF Power Amplifier - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 27 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 175 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
Linear RF Power Amplifier - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 250 V
Plate Dissipation ............................. 35 W
Grid No. 2 Dissipation ........................ 3 W
Plate Current ................................. 250 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 30K Ω
Bulb Temperature (At Hottest Point) ........... 260 °C
Plate Modulated RF Power Amplifier - Class C (CCS)
Plate Voltage ................................. 475 V
Grid No. 2 Voltage ............................ 165 V
Grid No. 1 Voltage ............................ -86 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 26K Ω
Peak Grid No. 1 Voltage........................ 106 V
Grid No. 1 Current ............................ 3.3 mA
Plate Current ................................. 125 mA
Grid No. 2 Current ............................ 8.5 mA
Driving Power ................................. 0.4 W
Power Output (approx) ......................... 42 W
Plate Modulated RF Power Amplifier - Class C (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 175 V
Grid No. 1 Voltage ............................ -92 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 27K Ω
Peak Grid No. 1 Voltage........................ 114 V
Grid No. 1 Current ............................ 3.4 mA
Plate Current ................................. 140 mA
Grid No. 2 Current ............................ 9.5 mA
Driving Power ................................. 0.5 W
Power Output (approx) ......................... 62 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -47 V
Peak Grid No. 1 Voltage........................ 94 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 48 mA
Plate Current (Maximum Signal) ................ 259 mA
Grid No. 2 Current (Maximum Signal) ........... 14.8 mA
Driving Power ................................. 0 W
Load Resistance ............................... 5.6K Ω
Power Output (approx) ......................... 96 W
Push Pull AF Power Amplifier & Modulator - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -48 V
Peak Grid No. 1 Voltage........................ 96 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 250 mA
Grid No. 2 Current (Maximum Signal) ........... 12.6 mA
Driving Power ................................. 0 W
Load Resistance ............................... 7.2K Ω
Power Output (approx) ......................... 124 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 500 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -46 V
Peak Grid No. 1 Voltage........................ 108 V
Grid No. 1 Current ............................ 2.7 mA
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 308 mA
Grid No. 2 Current (Maximum Signal) ........... 26 mA
Driving Power ................................. 0.2 W
Load Resistance ............................... 3620 Ω
Power Output (approx) ......................... 100 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -48 V
Peak Grid No. 1 Voltage........................ 106 V
Grid No. 1 Current ............................ 1.3 mA
Plate Current (Zero Signal) ................... 40 mA
Plate Current (Maximum Signal) ................ 270 mA
Grid No. 2 Current (Maximum Signal) ........... 27 mA
Driving Power ................................. 0.7 W
Load Resistance ............................... 5.2K Ω
Power Output (approx) ......................... 110 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -47 V
Peak Grid No. 1 Voltage........................ 114 V
Grid No. 1 Current ............................ 3.4 mA
Plate Current (Zero Signal) ................... 50 mA
Plate Current (Maximum Signal) ................ 328 mA
Grid No. 2 Current (Maximum Signal) ........... 26 mA
Driving Power ................................. 0.2 W
Load Resistance ............................... 4160 Ω
Power Output (approx) ......................... 130 W
Push Pull AF Power Amplifier & Modulator - Class AB2 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -39 V
Peak Grid No. 1 Voltage........................ 110 V
Grid No. 1 Current ............................ 7.6 mA
Plate Current (Zero Signal) ................... 40 mA
Plate Current (Maximum Signal) ................ 294 mA
Grid No. 2 Current (Maximum Signal) ........... 28 mA
Driving Power ................................. 0.7 W
Load Resistance ............................... 6050 Ω
Power Output (approx) ......................... 148 W
RF Power Amplifier & Oscillator - Class C (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -70 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 24K Ω
Peak Grid No. 1 Voltage........................ 90 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) ......................... 63 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -77 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 28K Ω
Peak Grid No. 1 Voltage........................ 95 V
Grid No. 1 Current ............................ 2.7 mA
Plate Current ................................. 160 mA
Grid No. 2 Current ............................ 10 mA
Driving Power ................................. 0.3 W
Power Output (approx) ......................... 85 W
Maximum Frequency ............................. 60 MHz
RF Power Amplifier & Oscillator - Class C at 175 MHz (CCS)
Plate Voltage ................................. 320 V
Grid No. 2 Voltage ............................ 210 V
Grid No. 1 Voltage ............................ -52 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 26K Ω
Peak Grid No. 1 Voltage........................ 65 V
Grid No. 1 Current ............................ 2 mA
Plate Current ................................. 170 mA
Grid No. 2 Current ............................ 12.0 mA
Driving Power ................................. 2.0 W
Power Output (approx) ......................... 29 W
Maximum Frequency ............................. 175 MHz
RF Power Amplifier & Oscillator - Class C at 175 MHz (ICAS)
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 220 V
Grid No. 1 Voltage ............................ -55 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 30K Ω
Peak Grid No. 1 Voltage........................ 67 V
Grid No. 1 Current ............................ 1.9 mA
Plate Current ................................. 180 mA
Grid No. 2 Current ............................ 12 mA
Driving Power ................................. 2.0 W
Power Output (approx) ......................... 40 W
Maximum Frequency ............................. 175 MHz
RF Power Amplifier & Oscillator - Class C at 175 MHz (ICAS)
Plate Voltage ................................. 435 V
Grid No. 2 Voltage ............................ 230 V
Grid No. 1 Voltage ............................ -56 V
Grid No. 1 Voltage Derived from
Grid No. 1 Resistor ........................ 24K Ω
Peak Grid No. 1 Voltage........................ 73 V
Grid No. 1 Current ............................ 2.3 mA
Plate Current ................................. 210 mA
Grid No. 2 Current ............................ 11 mA
Driving Power ................................. 3.0 W
Power Output (approx) ......................... 50 W
Maximum Frequency ............................. 175 MHz
Linear RF Power Amplifier - Class AB1 (CCS)
Plate Voltage ................................. 600 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -47 V
Peak Grid No. 1 Voltage........................ 47 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 24 mA
Plate Current (Maximum Signal) ................ 125 mA
Grid No. 2 Current (Maximum Signal) ........... 7.4 mA
Driving Power ................................. 0 W
Power Output (approx) ......................... 49 W
Maximum Frequency ............................. 60 MHz
Linear RF Power Amplifier - Class AB1 (ICAS)
Plate Voltage ................................. 750 V
Grid No. 2 Voltage ............................ 200 V
Grid No. 1 Voltage ............................ -48 V
Peak Grid No. 1 Voltage........................ 48 V
Grid No. 1 Current ............................ 0 mA
Plate Current (Zero Signal) ................... 25 mA
Plate Current (Maximum Signal) ................ 125 mA
Grid No. 2 Current ............................ 13 mA
Driving Power ................................. 0 W
Power Output (approx) ......................... 61 W
Maximum Frequency ............................. 60 MHz
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(c) 1994-2021 by William A. Beech, NJ7P
Thu, 02 Feb 2023 04:34:37 -0700