NJ7P SQL Tube Database Query

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6AU6WA
Sharp-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ TungSol
Miniature type used in compact radio equipment as an rf amplifier especially in high-frequency, wide-band applications. It is also used as a limiter tube in FM equipment. Tube requires miniature 7-contact socket and may be mounted in any position.

Mechanical Data

Source ........................................ TungSol
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7BK
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ TungSol
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Heater Warm-up Time ........................... 11 s
Maximum Heater-Cathode Voltage ................ 100 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ TungSol
Shielded Unshielded
Input ......................................... 5.5 5.5 pf
Output ........................................ 5.0 5.0 pf
Grid to Plate ................................. 0.0035 0.0035 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ TungSol
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 165 V
Plate Dissipation ............................. 3.3 W
Grid No. 2 Dissipation ........................ 0.7 W
Bulb Temperature (At Hottest Point) ........... 165 °C

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 150 Ω
Plate Resistance (approx) ..................... 500K Ω
Transconductance .............................. 3900 µ
Plate Current ................................. 5 mA
Grid No. 2 Current ............................ 2.1 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -4.2 V

Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 100 Ω
Plate Resistance (approx) ..................... 1.5M Ω
Transconductance .............................. 4500 µ
Plate Current ................................. 7.6 mA
Grid No. 2 Current ............................ 3 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -5.5 V

Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 5200 µ
Plate Current ................................. 10.6 mA
Grid No. 2 Current ............................ 4.3 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -6.5 V

Class A Amplifier (Triode Connected)
Source ........................................ TungSol
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -4 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 330 Ω
Amplification Factor .......................... 36
Plate Resistance (approx) ..................... 7.5K Ω
Transconductance .............................. 4800 µ
Plate Current ................................. 12.2 mA

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

(c) 1994-2021 by William A. Beech, NJ7P

Sat, 25 Mar 2023 03:43:18 -0700