NJ7P SQL Tube Database Query

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12DQ7
Power Pentode

EIA Base & Outline

EIA Base: 9BFEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 12BY7
Substitutes ................................... 12BV7 12GN7
Source ........................................ ARRL HB - 1964

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9BF
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 0.6/0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ ARRL HB - 1964
Input ......................................... 10.2 pf
Output ........................................ 3.5 pf
Grid to Plate ................................. 0.063 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 190 V
Plate Dissipation ............................. 6.5 W
Grid No. 2 Dissipation ........................ 1.2 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 180 V
Plate Resistance (approx) ..................... 53K Ω
Transconductance .............................. 10.5K µMho
Plate Current ................................. 26 mA
Grid No. 2 Current ............................ 5.6 mA

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Tue, 16 Aug 2022 08:25:00 -0700