NJ7P SQL Tube Database Query

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6DZ7
Twin Power Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 6DY7
Source ........................................ GE - 1973

Application

Source ........................................ GE - 1973
Glass octal type used as the output stage of hifi audio amplifiers. Requires octal socket.

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-12
Base Type ..................................... Short Medium Shell Octal 8-Pin
EIA Outline ................................... 12-14
EIA Base ...................................... 8JP
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.52 A

Direct Interelectrode Capacitances (approx)

Pentode 1
Source ........................................ GE - 1973
Input ......................................... 11 pf
Output ........................................ 5 pf
Grid to Plate ................................. 0.7 pf

Pentode 2
Source ........................................ GE - 1973
Input ......................................... 11 pf
Output ........................................ 5 pf
Grid to Plate ................................. 0.5 pf

Maximum Ratings (Design Center Values)

Pentode 1
Source ........................................ GE - 1973
Plate Voltage ................................. 440 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 13.2 W
Grid No. 2 Dissipation ........................ 4.0 W

Pentode 2
Source ........................................ GE - 1973
Plate Voltage ................................. 440 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 13.2 W
Grid No. 2 Dissipation ........................ 4.0 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -7.3 V
Plate Resistance (approx) ..................... 38000 Ω
Transconductance .............................. 11300 µ
Plate Current ................................. 48 mA
Grid No. 2 Current ............................ 5.5 mA

Push Pull Class AB1 Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -11 V
Peak Grid No. 1 Voltage........................ 22 V
Plate Current (Zero Signal) ................... 40 mA
Plate Current (Maximum Signal) ................ 100 mA
Grid No. 2 Current (Zero Signal) .............. 7.0 mA
Grid No. 2 Current (Maximum Signal) ........... 15 mA
Load Resistance ............................... 9K Ω
Power Output (approx) ......................... 18 W

Push Pull Class AB1 Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 120 Ω
Peak Grid No. 1 Voltage........................ 22 V
Plate Current (Zero Signal) ................... 66 mA
Plate Current (Maximum Signal) ................ 80 mA
Grid No. 2 Current (Zero Signal) .............. 4.0 mA
Grid No. 2 Current (Maximum Signal) ........... 15 mA
Load Resistance ............................... 9K Ω
Power Output (approx) ......................... 12 W

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

Mon, 30 Jan 2023 01:05:22 -0700