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6MF8
High-Mu Triode - Beam Power Tube

Base & Bulb ( RCA RC-29 - 1975)

Substitute Data

Substitutes ................................... 6LU8

Application

Duodecar type used in combined vertical-deflection oscillator and amplifier in color tv receivers. Requires Duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-12
Outline ....................................... 12-57
EIA Base ...................................... 12DZ

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.4 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 .............................. 100 V
Total DC and Peak ......................... 200 V

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 12 W
Grid No. 2 Dissipation ........................ 2.75 W
Grid No. 1 Circuit Resistance
Self Bias ................................... 1M Ω
Bulb Temperature (At Hottest Point) ........... 200 °C

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 400 V
Plate Dissipation ............................. 2.5 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 2.2M Ω
Self Bias ................................... 2.2M Ω
Bulb Temperature (At Hottest Point) ........... 200 °C

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -4 V
Amplification Factor .......................... 58
Plate Resistance (approx) ..................... 14K Ω
Transconductance .............................. 4100 µ
Plate Current ................................. 2.6 mA

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -20 V
Plate Resistance (approx) ..................... 5K Ω
Transconductance .............................. 4100 µ
Plate Current ................................. 50 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -65 V

Characteristics and Typical Operation

Vert Defl Amplifier
DC Plate Supply Voltage ....................... 400 V
Peak Positive-Pulse Plate Voltage ............. 2500 V
DC Grid No. 2 Voltage ......................... 300 V
Average Cathode Current ....................... 75 mA
Peak Cathode Current .......................... 260 mA
Plate Dissipation ............................. 12 W
Grid No. 2 Dissipation ........................ 2.75 W

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