NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

5897
Medium-Mu Triode

EIA Base & Outline

EIA Base: 8DKEIA Bulb: 3-1
Source ........................................ GE - 1973

Application

Subminiature type used as amplifier and oscillator at frequencies up to 500 MHz in subminiature equipment. Requires either a subminiature socket or direct soldering of the wires from the tube to circuit components.

Mechanical Data

EIA Outline ................................... 3-1
EIA Base ...................................... 8DK

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 2.2 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 1.4 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 165 V
Plate Dissipation ............................. 3.3 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 150 Ω
Amplification Factor .......................... 27
Transconductance .............................. 5800 µMho
Plate Current ................................. 8.5 mA

Class C Oscillator/Amplifier
Plate Voltage ................................. 150 V
Plate Current ................................. 20 mA
Power Output (approx) ......................... 0.9 W

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 10 Dec 2022 02:41:54 -0700