NJ7P SQL Tube Database Query

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6T4
Low-Mu Triode

EIA Base & Outline

EIA Base: 7DKEIA Bulb: 5-1

Substitute Data

Preferred Substitutes ......................... 6AF4
Substitutes ................................... 6AN4 6AF4 6DX4
Source ........................................ Sylvania 1959

Application

Source ........................................ Sylvania 1959
Miniature type used as an oscillator in UHF television applications. Requires miniature 7-contact socket.

Mechanical Data

Source ........................................ Sylvania 1959
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-1
EIA Base ...................................... 7DK
Mounting Position ............................. Any

Electrical Data

Source ........................................ Sylvania 1959
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.225 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ Sylvania 1959
Shielded Unshielded
Input ......................................... 3.3 2.6 pf
Output ........................................ 2.0 0.4 pf
Grid to Plate ................................. 1.7 1.7 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ Sylvania 1959
Plate Voltage ................................. 200 V
Plate Dissipation ............................. 3.5 W
Cathode Current ............................... 30 mA

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ Sylvania 1959
Plate Voltage ................................. 80 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 150 Ω
Amplification Factor .......................... 13
Plate Resistance (approx) ..................... 1860 Ω
Transconductance .............................. 7000 µMho
Plate Current ................................. 18 mA

Class C Oscillator (950 MHz)
Source ........................................ Sylvania 1959
Plate Voltage ................................. 80 V
Grid No. 1 Voltage ............................ -4 V
Plate Current ................................. 18 mA

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Thu, 30 Jun 2022 04:18:25 -0700