NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

5902
Beam Power Pentode

EIA Base & Outline

EIA Base: 8DLEIA Bulb: 3-3
Source ........................................ GE - 1973

Application

Subminiature type used as af power 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 ................................... 3-3
EIA Base ...................................... 8DL

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 6.5 pf
Output ........................................ 7.5 pf
Grid to Plate ................................. 0.11 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 165 V
Grid No. 2 Voltage ............................ 155 V
Plate Dissipation ............................. 4.1 W
Grid No. 2 Dissipation ........................ 0.4 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 270 Ω
Plate Resistance (approx) ..................... 15000 Ω
Transconductance .............................. 4200 µMho
Plate Current ................................. 30 mA
Grid No. 2 Current ............................ 2.2 mA
Load Resistance ............................... 3K Ω
Power Output (approx) ......................... 1.0 W

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 16 Aug 2022 00:12:57 -0700