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6JM6
Beam Power Pentode

Base & Bulb ( GE DS 4/64)

Application

Duodecar type used as horizontal-deflection amplifier in color and bw tv receivers. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-12
Base .......................................... E12-74 Button 12-Pin
Outline ....................................... 12-79
Maximum Overall Length ...................... 3.625 In.
Maximum Seated Height ....................... 3.250 In.
Maximum Diameter ............................ 1.563 In.
EIA Base ...................................... 12FJ
Top Cap ....................................... C1-3 Skirted Miniature
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.2 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)

Pentode
Input ......................................... 16.0 pf
Output ........................................ 7.0 pf
Grid to Plate ................................. 0.6 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 770 V
Grid No. 2 Voltage ............................ 220 V
Negative Grid No. 1 Voltage ................... -55 V
Plate Dissipation ............................. 17.5 W
Grid No. 2 Dissipation ........................ 3.5 W
Cathode Current ............................... 175 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω
Self Bias ................................... 1M Ω
Bulb Temperature (At Hottest Point) ........... 220 °C

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -22.5 V
Plate Resistance (approx) ..................... 18K Ω
Transconductance .............................. 7300 µ
Plate Current ................................. 65 mA
Grid No. 2 Current ............................ 1.8 mA
Grid No. 1 Voltage for Ib ..................... 1000 µa @ -42 V

Characteristics and Typical Operation

Hortz Defl Amplifier
DC Plate Supply Voltage ....................... 770 V
Peak Positive-Pulse Plate Voltage ............. 6500 V
Peak Negative-Pulse Plate Voltage ............. 1500 V
DC Grid No. 3 Voltage ......................... 70 V
DC Grid No. 2 Voltage ......................... 220 V
Peak Negative-Pulse Grid No. 1 Voltage ........ -330 V
Average Cathode Current ....................... 175 mA
Peak Cathode Current .......................... 550 mA
Plate Dissipation ............................. 17.5 W
Grid No. 2 Dissipation ........................ 3.5 W

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