NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

1F4
Power Pentode

EIA Base & Outline

EIA Base: 5KEIA Bulb: 14-1

Substitute Data

Substitutes ................................... 33
Source ........................................ RCA RC-13 - 1937

Application

Source ........................................ RCA RC-13 - 1937
Glass octal type used in output stage of battery-operated receivers. Requires an octal socket. Similar electrically to Type 1F5G.

Mechanical Data

Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-14
Base Type ..................................... Medium 5-Pin
EIA Outline ................................... 14-1
EIA Base ...................................... 5K
Mounting Position ............................. Vertical

Electrical Data

Source ........................................ RCA RC-13 - 1937
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.12 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 135 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
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 340
Plate Resistance (approx) ..................... 240K Ω
Transconductance .............................. 1400 µMho
Plate Current ................................. 4.0 mA
Grid No. 2 Current ............................ 1.3 mA
Load Resistance ............................... 20K Ω
Power Output (approx) ......................... 0.12 W

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 1 Voltage ............................ -4.5 V
Amplification Factor .......................... 340
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 1700 µMho
Plate Current ................................. 8.0 mA
Grid No. 2 Current ............................ 2.6 mA
Load Resistance ............................... 16K Ω
Power Output (approx) ......................... 0.34 W

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 02 Jul 2022 19:25:23 -0700