NJ7P SQL Tube Database Query

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6JZ8
Medium-Mu Triode - Power Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 6LU8
Source ........................................ GE DS 12/63

Application

Source ........................................ GE DS 12/63
Duodecar type used in combined vertical-deflection oscillator and amplifier in tv receivers. Requires duodecar 12-contact socket.

Mechanical Data

Source ........................................ GE DS 12/63
Bulb .......................................... T-9
Base Type ..................................... E12-70 Button 12-Pin
EIA Outline ................................... 9-58
EIA Base ...................................... 12DZ
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 12/63
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.2 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 100 V
Total DC and Peak ....................... 200 V
Heater Negative with Respect to Cathode
Total DC and Peak ....................... 200 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ GE DS 12/63
Input ......................................... 11.0 pf
Output ........................................ 7.0 pf
Grid to Plate ................................. 0.34 pf

Triode
Source ........................................ GE DS 12/63
Input ......................................... 2.2 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 3.6 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE DS 12/63
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 200 V
Plate Dissipation ............................. 7 W
Grid No. 2 Dissipation ........................ 1.8 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 1M Ω
Self Bias .................................. 2.2M Ω

Triode
Source ........................................ GE DS 12/63
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 1M Ω
Self Bias .................................. 2.2M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ GE DS 12/63
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -5 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 8500 Ω
Transconductance .............................. 2350 µ
Plate Current ................................. 5.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -11 V

Pentode Class A Amplifier
Source ........................................ GE DS 12/63
Plate Voltage ................................. 120 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -8 V
Plate Resistance (approx) ..................... 11700 Ω
Transconductance .............................. 7100 µ
Plate Current ................................. 46 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -25 V

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

Mon, 06 Feb 2023 19:14:34 -0700