NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

3V4
Power Pentode

EIA Base & Outline

EIA Base: 6BXEIA Bulb: 5-2

Substitute Data

Substitutes ................................... 3C4 3E5
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Miniature type used in output stage of lightweight, compact, portable, battery-operated equipment. Requires miniature 7-contact socket. Except for basing, it is identical to 3Q4.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 6BX
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 2.8/1.4 DC V
Filament Current .............................. .05/.1 A

Characteristics and Typical Operation

Class A Amplifier (1.4V)
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -4.5 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 2150 µMho
Plate Current ................................. 9.5 mA
Grid No. 2 Current ............................ 2.1 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 0.27 W

Class A Amplifier (1.4V)
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 85 V
Grid No. 2 Voltage ............................ 85 V
Grid No. 1 Voltage ............................ -5 V
Plate Resistance (approx) ..................... 120K Ω
Transconductance .............................. 1975 µMho
Plate Current ................................. 6.9 mA
Grid No. 2 Current ............................ 1.5 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 0.25 W

Class A Amplifier (2.8V)
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -4.5 V
Plate Resistance (approx) ..................... 120K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 7.7 mA
Grid No. 2 Current ............................ 1.7 mA
Load Resistance ............................... 10K Ω
Power Output (approx) ......................... 0.24 W

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 30 Jun 2022 16:34:02 -0700