NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

7R7
Twin Diode - Remote-Cutoff pentode

EIA Base & Outline

EIA Base: 8AEEIA Bulb: 9-30

Substitute Data

Substitutes ................................... 7E7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass lock-in type used as combined detector, amplifier, and avc tube. Requires lock-in socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-in 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 8AE

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 3200 µMho
Plate Current ................................. 5.7 mA
Grid No. 2 Current ............................ 2.1 mA

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 04 Dec 2021 18:43:37 -0700