NJ7P SQL Tube Database Query

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6T4
Low-Mu Triode

EIA Base & Outline

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 µ
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

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

(c) 1994-2021 by William A. Beech, NJ7P

Sat, 10 Dec 2022 02:22:37 -0700