NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

1H4G
Medium-Mu Triode

EIA Base & Outline

EIA Base: 5SEIA Bulb: 12-7

Substitute Data

Preferred Substitutes ......................... DAC32
Substitutes ................................... 1E4 1G4
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used as detector or voltage amplifier in battery-operated receivers. Requires octal socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... ST-12
Base Type ..................................... Octal
EIA Outline ................................... 12-7
EIA Base ...................................... 5S

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Maximum Ratings (Design Center Values)

Triode
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 180 V

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ -13.5 V
Amplification Factor .......................... 9.3
Plate Resistance (approx) ..................... 10.3K Ω
Transconductance .............................. 900 µMho
Plate Current ................................. 3.1 mA

Push Pull Class B Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 157.5 V
Grid No. 1 Voltage ............................ -15 V
Plate Current ................................. 1.0 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 2.1 W

A horizontal ribbon.

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A horizontal ribbon.

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Mon, 27 Jun 2022 10:08:21 -0700