NJ7P SQL Tube Database Query

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6AU6A
Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6136 8245A 6HS6
Substitutes ................................... 6BA6 6HR6 6AH6 6CG6 6AG5 6BC5 6CE5
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
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 ........................................ RCA RC-29 - 1975
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 ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 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 ........................................ RCA RC-29 - 1975
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 ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 3.5 W
Grid No. 2 Dissipation ........................ 0.75 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
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
Source ........................................ RCA RC-29 - 1975
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 ........................................ RCA RC-29 - 1975
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 ................................. 5.0 mA
Grid No. 2 Current ............................ 2.1 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -4.2 V

Class A Amplifier (Triode Connected)
Source ........................................ RCA RC-29 - 1975
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

Thu, 18 Aug 2022 00:37:18 -0700