NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

6872
Pentode

EIA Base & Outline

EIA Base: 5702EIA Bulb: 3-7
Source ........................................ GE - 1973

Application

Subminiature type used as rf or if amplifier in subminiature equipment. Requires either a subminiature socket or direct soldering of the wires from the tube to circuit components.

Mechanical Data

EIA Outline ................................... 3-7
EIA Base ...................................... 5702

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.2 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 5.0 pf
Output ........................................ 3.5 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 165 V
Grid No. 2 Voltage ............................ 155 V
Plate Dissipation ............................. 1.1 W
Grid No. 2 Dissipation ........................ 0.4 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 120 V
Grid No. 2 Voltage ............................ 120 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 200 Ω
Plate Resistance (approx) ..................... 340K Ω
Transconductance .............................. 4100 µMho
Plate Current ................................. 7.75 mA
Grid No. 2 Current ............................ 2.7 mA

A horizontal ribbon.

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A horizontal ribbon.

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Wed, 08 Dec 2021 12:18:43 -0700