NJ7P SQL Tube Database Query

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6AW8A
High-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6AU8
Substitutes ................................... 6BA8 6CX8 6EB8 6HF8 6JE8 6JT8 6JV8 6KS8 6KV8 6LY8
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in television receiver applications. Pentode unit is used as video amplifier, if amplifier, agc amplifier or reactance tube.

Source ........................................ RCA RC-29 - 1975
Triode unit is used in low-frequency oscillator, sync-separator, sync-clipper, and phase-splitter circuits. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9DX
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
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 ........................................ RCA RC-29 - 1975
Shielded Unshielded
Input ......................................... 10 10 pf
Output ........................................ 3.6 4.5 pf
Grid to Plate ................................. 0.5 0.4 pf

Triode
Source ........................................ RCA RC-29 - 1975
Shielded Unshielded
Input ......................................... 3.2 3.4 pf
Output ........................................ 1.8 3.0 pf
Grid to Plate ................................. 2.2 2.2 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 3.75 W
Grid No. 2 Dissipation ........................ 1.1 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 1M Ω
Self Bias .................................. 1M Ω

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.1 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 0.5M Ω
Self Bias .................................. 0.25M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 70
Plate Resistance (approx) ..................... 17.5K Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 4 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -5 V

Pentode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 9000 µ
Plate Current ................................. 13 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -8 V

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

Wed, 29 Mar 2023 00:20:41 -0700