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6BX7GT
High-Mu Twin Triode

Base & Bulb ( TungSol DS 01/56)

Substitute Data

Preferred Substitutes ......................... 6BL7
Substitutes ................................... 6DN7

Application

Glass octal type used as a combined vertical oscillator and vertical deflection amplifier in television receivers. Requires octal socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... Short Intermediate Shell Octal
Outline ....................................... 9-41
EIA Base ...................................... 8BD
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

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
DC Component .............................. 200 V
Total DC and Peak ......................... 200 V

Direct Interelectrode Capacitances (approx)

Triode 1
Shielded Unshielded
Input ......................................... 4.4 5.0 pf
Output ........................................ 1.1 3.4 pf
Grid to Plate ................................. 4.2 4.2 pf

Direct Interelectrode Capacitances (approx)

Triode 2
Shielded Unshielded
Input ......................................... 4.8 5.0 pf
Output ........................................ 1.2 3.2 pf
Grid to Plate ................................. 4.0 4.0 pf

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage ................................. 500 V
Negative Grid No. 1 Voltage ................... 400 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 10 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 2.2M Ω

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 390 Ω
Amplification Factor .......................... 10
Plate Resistance (approx) ..................... 1.3K Ω
Transconductance .............................. 7600 µ
Plate Current ................................. 42 mA
Grid No. 1 Voltage for Ib ..................... 50 µa @ -40 V

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ 0 V
Plate Current ................................. 80 mA

Characteristics and Typical Operation

Triode 2 Vert Defl Amplifier
DC Plate Supply Voltage ....................... 500 V
Peak Positive-Pulse Plate Voltage ............. 2000 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 250 V
Average Cathode Current ....................... 60 mA
Peak Cathode Current .......................... 180 mA
Plate Dissipation ............................. 10 W

Notes:

1. Total dissipation is 12 watts for both units operating.

Characteristic Curves

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