NJ7P SQL Tube Database Query

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6AS6
Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 7CMEIA Bulb: 5-1

Substitute Data

Preferred Substitutes ......................... 6DB6 5725
Substitutes ................................... 6GX6 6GY6 6HZ6
Source ........................................ GE DS 12/49

Application

Source ........................................ GE DS 12/49
Miniature sharp-cutoff pentode whose control grid and suppressor grid can be used as independent control elements. Suitable for use in gated amplifiers, gain-controlled amplifiers, delay circuits and micer circuits. Requires minature 7-pin socket.

Mechanical Data

Source ........................................ GE DS 12/49
Bulb .......................................... T-5 1/2
Base Type ..................................... E7-1 Miniature Button 7-Pin
EIA Outline ................................... 5-1
EIA Base ...................................... 7CM
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE DS 12/49
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.175 A
Maximum Heater-Cathode Voltage ................ 90 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ GE DS 12/49
Grid No. 1 to Plate ........................... 0.02 pf
Grid No. 1 to All Except Plate (Input) ........ 4.0 pf
Grid No. 3 to All (Input) ..................... 3.4 pf
Grid No. 1 to Grid No. 3 ...................... 0.15 pf
Plate to All (Output) ......................... 3.0 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE DS 12/49
Plate Voltage ................................. 180 V
Grid No. 3 Voltage ............................ 27 V
Grid No. 2 Voltage ............................ 140 V
Plate Dissipation ............................. 1.7 W
Grid No. 2 Dissipation ........................ 0.75 W
Cathode Current ............................... 18 mA
Bulb Temperature (At Hottest Point) ........... 120 °C

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE DS 12/49
Plate Voltage ................................. 120 V
Grid No. 3 Voltage ............................ -3 V
Grid No. 2 Voltage ............................ 120 V
Grid No. 1 Voltage ............................ -2 V
Grid No. 1 Transconductance ................... 1850 µMho
Grid No. 3 Transconductance ................... 810 µMho
Plate Current ................................. 3.6 mA
Grid No. 2 Current ............................ 4.8 mA
Grid No. 3 Voltage for Ib ..................... 10 µa @ -10 V

Class A Amplifier
Source ........................................ GE DS 12/49
Plate Voltage ................................. 120 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 120 V
Grid No. 1 Voltage ............................ -2 V
Plate Resistance (approx) ..................... 110K Ω
Grid No. 1 Transconductance ................... 3200 µMho
Grid No. 3 Transconductance ................... 470 µMho
Plate Current ................................. 5.2 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -7.5 V

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Thu, 18 Aug 2022 01:49:01 -0700