NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

3Q5GT
Beam Power Pentode

EIA Base & Outline

EIA Base: 7AQEIA Bulb: 9-11 9-41

Substitute Data

Preferred Substitutes ......................... 3C5
Substitutes ................................... 3B5
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used in output stage of ac/dc/battery portable receivers. Requires octal socket and may be mounted in any postion.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Intermediate Octal 7-Pin
EIA Outline ................................... 9-11
EIA Base ...................................... 7AP`
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 1.4/2.8 DC V
Heater Current ................................ 0.1/0.05 A

Characteristics and Typical Operation

Class A Amplifier (2.8V)
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -6.6 V
Plate Resistance (approx) ..................... 110K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 8.5 mA
Grid No. 2 Current ............................ 1.1 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 0.33 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) ..................... 80K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 8.0 mA
Grid No. 2 Current ............................ 1.0 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 0.23 W

Class A Amplifier (1.4V)
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -6.6 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 1.4 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 0.4 W

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) ..................... 90K Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 9.5 mA
Grid No. 2 Current ............................ 1.3 mA
Load Resistance ............................... 8K 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) ..................... 70K Ω
Transconductance .............................. 1950 µMho
Plate Current ................................. 7.0 mA
Grid No. 2 Current ............................ 0.8 mA
Load Resistance ............................... 9K Ω
Power Output (approx) ......................... 0.25 W

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 20 Jan 2022 16:18:28 -0700