NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

1L4
Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 6AREIA Bulb: 5-2

Substitute Data

Substitutes ................................... 1T4
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Miniature type used as rf or if amplifier in portable, batery-operatd receivers particularly those not utilizing avc. Requires miniature seven-contact socket and may be mounted in any position.

Mechanical Data

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

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 1.4 DC V
Filament Current .............................. 0.05 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-15 - 1947
Input ......................................... 3.6 pf
Output ........................................ 7.5 pf
Grid to Plate ................................. 0.008 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 90 V

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 260K Ω
Transconductance .............................. 1025 µMho
Plate Current ................................. 4.5 mA
Grid No. 2 Current ............................ 2.0 mA

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 925 µMho
Plate Current ................................. 2.9 mA
Grid No. 2 Current ............................ 1.2 mA

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 18 Aug 2022 01:46:02 -0700