NJ7P SQL Tube Database Query

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A horizontal ribbon.

1R5
Pentagrid Converter

EIA Base & Outline

EIA Base: 7ATEIA Bulb: 5-2

Substitute Data

Substitutes ................................... 1AF5 1AR5
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Miniature type used in lightweight, portable, compact, battery-operated receivers. Requires miniature 7-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 ...................................... 7AT
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)

Converter
Source ........................................ RCA RC-15 - 1947
Input ......................................... 7.0 pf
Output ........................................ 12.0 pf
Grid to Plate ................................. 0.3 pf

Characteristics and Typical Operation

Converter
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 .............................. 300 µMho
Plate Current ................................. 1.6 mA
Grid No. 2 Current ............................ 3.2 mA

Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 45 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 800K Ω
Transconductance .............................. 250 µMho
Plate Current ................................. 0.8 mA
Grid No. 2 Current ............................ 1.9 mA

Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 500K Ω
Transconductance .............................. 280 µMho
Plate Current ................................. 1.4 mA
Grid No. 2 Current ............................ 3.2 mA

Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 45 V
Grid No. 2 Voltage ............................ 45 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 235 µMho
Plate Current ................................. 0.7 mA
Grid No. 2 Current ............................ 2.1 mA

A horizontal ribbon.

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A horizontal ribbon.

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Mon, 30 Jan 2023 00:25:19 -0700