6EM7
Twin Triode

Data Source and Substitute Data

Data Source ................................... RCA RC-29 - 1975
Prefered Substitutes .......................... None
Substitutes ................................... 6DN7 6EA7 6GL7

Application

Glass octal type used as combined vertical-deflection amplifier and vertical-deflection oscillator in color and black-and-white television receivers. Requires octal socket. For curve of average plate characteristics, unit 1, refer to 6DR7 (unit 1).

Mechanical Data

Bulb .......................................... T-9
Base .......................................... Short Intermediate Shell Octal 8-Pin
Outline ....................................... 9-38
EIA Base ...................................... 8BD
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Characteristics
Heater Voltage ................................ 6.3 Volts
Heater Current ................................ 0.925 Amperes

Direct Interelectrode Capacitances (approx)

Triode 1
Input ......................................... 2.2 pf
Output ........................................ 0.6 pf
Grid to Plate ................................. 4.8 pf

Triode 2
Input ......................................... 7 pf
Output ........................................ 1.8 pf
Grid to Plate ................................. 10 pf

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 330 Volts
Plate Dissipation ............................. 1.5 Watts

Triode 2
Plate Voltage ................................. 330 Volts
Plate Dissipation ............................. 10 Watts

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Plate Voltage ................................. 250 Volts
Grid No. 1 Voltage ............................ -3 Volts
Amplification Factor .......................... 64
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 ............................ -20 Volts
Amplification Factor .......................... 5.4
Plate Resistance (approx) ..................... 750 Ohms
Transconductance .............................. 7200 MicroMhos
Plate Current (Zero Signal) ................... 50 Ma.

Tri 2 Vert Amplifier
DC Plate Supply Voltage ....................... 550 Volts DC
Peak Positive-Pulse Plate Voltage ............. 1500 Volts DC
Peak Negative-Pulse Grid No. 1 Voltage ........ -250 Volts DC
Average Cathode Current ....................... 50 Ma. DC
Peak Cathode Current .......................... 175 Ma. DC

Characteristic Curves

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