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A horizontal ribbon.

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A horizontal ribbon.

6FM7
Twin Triode

EIA Base & Outline

EIA Base: 12EJEIA Bulb: 9-58
Source ........................................ GE DS 07/63

Application

Source ........................................ GE DS 07/63
Duodecar type used as combined vertical-deflection oscillator and vertical-deflection amplifier in color and black-and-white television receivers.

Source ........................................ GE DS 07/63
Triode unit 1 is used as an oscillator, and triode unit 2 is used as an amplifier. Requires duodecar 12-contact socket.

Mechanical Data

Source ........................................ GE DS 07/63
Bulb .......................................... T-9
Base Type ..................................... E12-70 Button 12-Pin
EIA Outline ................................... 9-58
EIA Base ...................................... 12EJ
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 07/63
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.05 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 ............................ 200 V
Total DC and Peak ....................... 200 V

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ GE DS 07/63
Input ......................................... 2.4 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 4.0 pf

Triode 2
Source ........................................ GE DS 07/63
Input ......................................... 7.0 pf
Output ........................................ 1.1 pf
Grid to Plate ................................. 7.0 pf

Maximum Ratings (Design Center Values)

Triode 1
Source ........................................ GE DS 07/63
Plate Voltage ................................. 350 V
Negative Grid No. 1 Voltage ................... -400 V
Plate Dissipation ............................. 1 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 1M Ω
Self Bias .................................. 1M Ω

Triode 2
Source ........................................ GE DS 07/63
Plate Voltage ................................. 500 V
Negative Grid No. 1 Voltage ................... -250 V
Plate Dissipation ............................. 10 W
Cathode Current ............................... 50 mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 2.2M Ω
Self Bias .................................. 2.2M Ω

Characteristics and Typical Operation

Triode 1 Vertical Oscillator
Source ........................................ GE DS 07/63
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 66
Plate Resistance (approx) ..................... 30K Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 2 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -5.3 V

Triode 2 Vertical Amplifier
Source ........................................ GE DS 07/63
Plate Voltage ................................. 175 V
Grid No. 1 Voltage ............................ -25 V
Amplification Factor .......................... 5.5
Plate Resistance (approx) ..................... 920 Ω
Transconductance .............................. 6000 µMho
Plate Current ................................. 40 mA
Grid No. 1 Voltage for Ib ..................... 200 µa @ -45 V

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 25 Jun 2022 10:49:44 -0700