NJ7P SQL Tube Database Query

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6BL7GTA
Medium-Mu Twin Triode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6BX7GT
Source ........................................ GE DS 08/57

Application

Source ........................................ GE DS 08/57
Glass octal type used as combined vertical-deflection amplifier and vertical-deflection oscillator in color and black-and-white television receivers.

Source ........................................ GE DS 08/57
When so operated, it is recommended that unit no 1 (pins 4, 5 and 6) be used as the oscillator. Requires octal socket.

Mechanical Data

Source ........................................ GE DS 08/57
Bulb .......................................... T-9
Base Type ..................................... B8-58 Short Intermediate Octal 8-Pin
EIA Outline ................................... 9-41
EIA Base ...................................... 8BD
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 08/57
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.5 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)

Triode 1
Source ........................................ GE DS 08/57
Input ......................................... 4.2 pf
Output ........................................ 0.9 pf
Grid to Plate ................................. 6.0 pf

Triode 2
Source ........................................ GE DS 08/57
Input ......................................... 4.6 pf
Output ........................................ 0.9 pf
Grid to Plate ................................. 6.0 pf

Maximum Ratings (Design Center Values)

Each Triode
Source ........................................ GE DS 08/57
Plate Voltage ................................. 500 V
Negative Grid No. 1 Voltage ................... -400 V
Plate Dissipation ............................. 10 W
Cathode Current ............................... 210 mA
Grid No. 1 Circuit Resistance
Self Bias .................................. 4.7M Ω

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE DS 08/57
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -9 V
Amplification Factor .......................... 15
Plate Resistance (approx) ..................... 2150 Ω
Transconductance .............................. 7000 µ
Plate Current ................................. 40 mA
Grid No. 1 Voltage for Ib ..................... 50 µa @ -23 V

Vertical Amplifier
Source ........................................ GE DS 08/57
DC Plate Supply Voltage ....................... 500 V
Peak Positive-Pulse Plate Voltage ............. 2000 V
DC Grid No. 2 Voltage ......................... 250 V
Average Cathode Current ....................... 60 mA
Peak Cathode Current .......................... 210 mA
Plate Dissipation ............................. 10 W

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

Thu, 02 Feb 2023 23:25:19 -0700