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42
Power Pentode

EIA Base & Outline

EIA Base: 6BEIA Bulb: 14-1

Substitute Data

Substitutes ................................... 41
Source ........................................ RCA RC-13 - 1937

Application

Source ........................................ RCA RC-13 - 1937
Glass type used in audio output stage in avc receivers. This type is identical electrically with type 6F6.

Mechanical Data

Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-14
Base Type ..................................... Medium 6-Pin
EIA Outline ................................... 14-1
EIA Base ...................................... 6B
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-13 - 1937
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.7 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 315 V
Grid No. 2 Voltage ............................ 315 V
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. Ω
Self Bias .................................. Ω
Bulb Temperature (At Hottest Point) ........... °C

Characteristics and Typical Operation

Class A Amplifier (Triode Connected)
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -20 V
Amplification Factor .......................... 6.2
Plate Resistance (approx) ..................... 2.7K Ω
Transconductance .............................. 2300 µMho
Plate Current ................................. 31 mA
Load Resistance ............................... 3K Ω
Power Output (approx) ......................... 0.65 W
Total Harmonic Distortion ..................... 5 %

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -16.5 V
Amplification Factor .......................... 190
Plate Resistance (approx) ..................... 80K Ω
Transconductance .............................. 2350 µMho
Plate Current ................................. 34 mA
Grid No. 2 Current ............................ 6.5 mA
Load Resistance ............................... 7K Ω
Power Output (approx) ......................... 3 W
Total Harmonic Distortion ..................... 7 %

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 315 V
Grid No. 2 Voltage ............................ 315 V
Grid No. 1 Voltage ............................ -22 V
Amplification Factor .......................... 260
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 2600 µMho
Plate Current ................................. 42 mA
Grid No. 2 Current ............................ 8 mA
Load Resistance ............................... 7K Ω
Power Output (approx) ......................... 5 W
Total Harmonic Distortion ..................... 7 %

Push Pull Class AB2 Amplifier (Triode Connected)
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 350 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 730 Ω
Plate Current ................................. 50 mA
Grid No. 2 Current ............................ 8 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 14 W
Total Harmonic Distortion ..................... 7 %

Push Pull Class AB2 Amplifier (Triode Connected)
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 350 V
Grid No. 1 Voltage ............................ -38 V
Plate Current ................................. 45 mA
Grid No. 2 Current ............................ 5 mA
Load Resistance ............................... 6K Ω
Power Output (approx) ......................... 18 W
Total Harmonic Distortion ..................... 7 %

Push Pull Class AB2 Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 375 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 340 Ω
Plate Current ................................. 54 mA
Grid No. 2 Current ............................ 8 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 19 W
Total Harmonic Distortion ..................... 5 %

Push Pull Class AB2 Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 375 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -26 V
Plate Current ................................. 34 mA
Grid No. 2 Current ............................ 5 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 19 W
Total Harmonic Distortion ..................... 5 %

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