6DR7
Twin Triode

Data Source and Substitute Data

Data Source ................................... RCA RC-29 - 1975
Prefered Substitutes .......................... 6FD7
Substitutes ................................... 6CY7 6FR7

Application

Miniature type containing high-mu and low-mu triodes; used as combined vertical-deflection oscillator and vertical-deflection amplifier tube in television receivers. Requires miniature 9-contact socket.

Mechanical Data

Bulb .......................................... T-6 1/2
Base .......................................... Miniature Button 9-Pin
Outline ....................................... 6-3
EIA Base ...................................... 9HF
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Characteristics
Heater Voltage ................................ 6.3 Volts
Heater Current ................................ 0.9 Amperes

Direct Interelectrode Capacitances (approx)

Triode 1
Input ......................................... 2.2 pf
Output ........................................ 0.34 pf
Grid to Plate ................................. 4.5 pf

Triode 2
Input ......................................... 5.5 pf
Output ........................................ 1.0 pf
Grid to Plate ................................. 8.5 pf

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 330 Volts
Plate Dissipation ............................. 1 Watts

Triode 2
Plate Voltage ................................. 275 Volts
Plate Dissipation ............................. 7 Watts

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Plate Voltage ................................. 250 Volts
Grid No. 1 Voltage ............................ -3 Volts
Amplification Factor .......................... 68
Plate Resistance (approx) ..................... 40K Ohms
Transconductance .............................. 1600 MicroMhos
Plate Current (Zero Signal) ................... 1.4 Ma.

Triode 2 Class A Amplifier
Plate Voltage ................................. 150 Volts
Grid No. 1 Voltage ............................ -17.5 Volts
Amplification Factor .......................... 6
Plate Resistance (approx) ..................... 925 Ohms
Transconductance .............................. 6500 MicroMhos
Plate Current (Zero Signal) ................... 35 Ma.

Characteristic Curves