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6SN7GTA
Medium-Mu Twin Triode

Base & Bulb ( RCA DS 06/14/54)

Substitute Data

Preferred Substitutes ......................... 6SN7GTB
Substitutes ................................... 6BL7 6BX7GT

Application

Glass octal type used as phase inverter or resistance-coupled amplifier in radio equipment. Requires octal socket and may be mounted in any position. Each triode unit is independent of the other except for the common heater.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... Int or Short Int Shell Octal 8-Pin
Outline ....................................... 9-11 9-41
EIA Base ...................................... 8BD
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.6 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
Input ......................................... 2.2 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 4.0 pf

Direct Interelectrode Capacitances (approx)

Triode 2
Input ......................................... 2.6 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 3.8 pf

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 450 V
Plate Dissipation ............................. 5 W
Cathode Current ............................... 20 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω

Maximum Ratings (Design Center Values)

Triode 2
Plate Voltage ................................. 450 V
Plate Dissipation ............................. 5 W
Cathode Current ............................... 20 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -8 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 7.7K Ω
Transconductance .............................. 2600 µ
Plate Current ................................. 9 mA

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 6.7K Ω
Transconductance .............................. 3000 µ
Plate Current ................................. 10 mA

Characteristics and Typical Operation

Vert Defl Amplifier
DC Plate Supply Voltage ....................... 450 V
Peak Positive-Pulse Plate Voltage ............. 1500 V
DC Grid No. 2 Voltage ......................... 250 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 20 V
Average Cathode Current ....................... 70 mA
Peak Cathode Current .......................... 5 mA

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