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A horizontal ribbon.

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A horizontal ribbon.

6BH8
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9DXEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 6AU8
Substitutes ................................... 6CX8 6JL8 6KR8 6
Source ........................................ GE DS 02/55

Application

Source ........................................ GE DS 02/55
Miniature type used in television receiver applications. Triode is used as a sync amplifier, sync-separator or sync-clipper; the pentode is used as a video amplifier, video if amplifier or sound if amplifier. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ GE DS 02/55
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9DX
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 02/55
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.6 A
Heater Warm-up Time ........................... 11 s
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
Source ........................................ GE DS 02/55
Input ......................................... 7 pf
Output ........................................ 2.4 pf
Grid to Plate ................................. 0.046 pf

Triode
Source ........................................ GE DS 02/55
Input ......................................... 2.6 pf
Output ........................................ 0.38 pf
Grid to Plate ................................. 2.4 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE DS 02/55
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3.0 W
Grid No. 2 Dissipation ........................ 1.0 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 250K Ω
Self Bias .................................. 1M Ω

Triode
Source ........................................ GE DS 02/55
Plate Voltage ................................. 300 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.5 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 500K Ω
Self Bias .................................. 1M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ GE DS 02/55
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -5.0 V
Amplification Factor .......................... 17
Plate Resistance (approx) ..................... 5150 Ω
Transconductance .............................. 3300 µMho
Plate Current ................................. 9.5 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -14.0 V

Pentode Class A Amplifier
Source ........................................ GE DS 02/55
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 82 Ω
Plate Resistance (approx) ..................... 150K Ω
Transconductance .............................. 7000 µMho
Plate Current ................................. 15.0 mA
Grid No. 2 Current ............................ 3.4 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -8.0 V

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 09 Aug 2022 08:01:33 -0700