NJ7P SQL Tube Database Query

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50
Power Triode

EIA Base & Outline

EIA Base: 4DEIA Bulb: 21-0
Source ........................................ RCA R-10 - 1932

50
Power Triode

EIA Base: 4DEIA Bulb: 19-1
Source ........................................ RCA RC-13 - 1937

Application

Source ........................................ RCA R-10 - 1932
The '50 is a power amplifier tube designed for use primarily in the output stage of an audio-frequency amplifier employing transformer coupling. It is capable of delivering unusually large amounts of undistorted power.

Mechanical Data

Source ........................................ RCA R-10 - 1932
Bulb .......................................... S-21
Base Type ..................................... Medium 4-Pin Bayonet
EIA Outline ................................... 21-0
EIA Base ...................................... 4D
Mounting Position ............................. Vertical

Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-19
EIA Outline ................................... 19-1

Electrical Data

Source ........................................ RCA R-10 - 1932
Filament Voltage .............................. 7.5 V
Filament Current .............................. 1.25 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ RCA R-10 - 1932
Input ......................................... 5 pf
Output ........................................ 3 pf
Grid to Plate ................................. 9 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 450 V

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 350 V
Grid No. 1 Voltage ............................ -63 V
Amplification Factor .......................... 3.8
Plate Resistance (approx) ..................... 1900 Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 45 mA
Load Resistance ............................... 4100 Ω
Power Output (approx) ......................... 2.4 W

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 400 V
Grid No. 1 Voltage ............................ -70 V
Amplification Factor .......................... 3.8
Plate Resistance (approx) ..................... 1800 Ω
Transconductance .............................. 2100 µMho
Plate Current ................................. 55 mA
Load Resistance ............................... 3670 Ω
Power Output (approx) ......................... 3.4 W

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 450 V
Grid No. 1 Voltage ............................ -84 V
Amplification Factor .......................... 3.8
Plate Resistance (approx) ..................... 1800 Ω
Transconductance .............................. 2100 µMho
Plate Current ................................. 55 mA
Load Resistance ............................... 4350 Ω
Power Output (approx) ......................... 4.6 W

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Mon, 27 Jun 2022 07:41:53 -0700