NJ7P SQL Tube Database Query

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6AG5A
Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6BC5
Substitutes ................................... 6CE5

Application

Miniature type used in compact radio equipment as an rf or if amplifier up to 400 MHz. Tube requires miniature 7-contact socket and may be mounted in any position.

The two cathode leads facilitate isolation of the input and output circuits thus helping to minimize degeneration.

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 6.5 pf
Output ........................................ 1.8 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 150 V
Plate Dissipation ............................. 2 W
Grid No. 2 Dissipation ........................ 0.5 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 800K Ω
Transconductance .............................. 5000 µ
Plate Current ................................. 6.5 mA
Grid No. 2 Current ............................ 2 mA

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 4500 µ
Plate Current ................................. 4.5 mA
Grid No. 2 Current ............................ 1.4 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, 02 Feb 2023 05:26:22 -0700