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A horizontal ribbon.

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A horizontal ribbon.

6HS8
Sharp-Cutoff Twin Pentode

EIA Base & Outline

EIA Base: 9FGEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 6BU8
Substitutes ................................... 6KF8 6GS8
Source ........................................ GE DS 12/61

Application

Source ........................................ GE DS 12/61
Miniature type used as agc amplifier, sync and noise limiting circuits of color and bw tv receivrs. One pentode used as combined sync-separator and sync-clipper; second pentode used as agc amplifier. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ GE DS 12/61
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-3
EIA Base ...................................... 9FG

Electrical Data

Source ........................................ GE DS 12/61
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 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)

Each Pentode
Source ........................................ GE DS 12/61
Grid No. 3 to Plate (Each Unit) ............... 2.0 pf
Grid No. 1 to All ............................. 6.0 pf
Grid No. 3 to All (Each Unit) ................. 3.6 pf
Plate to All (Each Unit) ...................... 3.0 pf
Grid No. 3 to Grid No. 3 ...................... 0.015 pf

Maximum Ratings (Design Center Values)

Each Pentode
Source ........................................ GE DS 12/61
Plate Voltage (Each Unit) ..................... 300 V
Grid No. 3 Voltage (Each Unit)
Peak Positive Value ........................ 50 V
Negative Bias Value ........................ 3.0 V
Positive Bias Value ........................ 50 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage
Negative Bias Value ........................ 50 V
Cathode Current ............................... 12 mA
Grid No. 2 Input .............................. 0.75 W
Plate Dissipation ............................. 1.1 W
Grid No. 3 Circuit Resistance (Each Unit) ..... 500K Ω
Grid No. 1 Circuit Resistance ................. 500K Ω

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE DS 12/61
With Both Units Operating
Plate Voltage (Each Unit) ..................... 100 V
Grid No. 3 Voltage (Each Unit) ................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Plate Current (Each Unit) ..................... 2.0 mA
Grid No. 2 Current ............................ 4.4 mA
Cathode Current ............................... 8.5 mA
With One Unit Operating
Plate Voltage ................................. 100 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 3 to Plate Transconductance .......... 450 µMho
Plate Current ................................. 2.0 mA
Grid No. 3 Voltage for Ib ..................... 25 µa @ -3.0 V

Class A Amplifier
Source ........................................ GE DS 12/61
With Both Units Operating
Plate Voltage (Each Unit) ..................... 100 V
Grid No. 3 Voltage (Each Unit) ................ -10 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 2 Current ............................ 7.0 mA
Cathode Current ............................... 7.1 mA
With One Unit Operating
Plate Voltage ................................. 100 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ 0 V
Grid No. 1 to Plate Transconductance .......... 1100 µMho

A horizontal ribbon.

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A horizontal ribbon.

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Thu, 08 Dec 2022 02:03:13 -0700