NJ7P SQL Tube Database Query

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6BD6
Remote-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6BA6 6CG6 5749
Substitutes ................................... 6HR6
Source ........................................ TungSol DS 11/53

Application

Source ........................................ TungSol DS 11/53
Miniature type used as rf or if amplifier. Requires miniature 7-contact socket. Electrically this type is identical to type 6SK7GT

Mechanical Data

Source ........................................ TungSol DS 11/53
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 ........................................ TungSol DS 11/53
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage ................ 90 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ TungSol DS 11/53
Shielded Unshielded
Input ......................................... 4.3 4.3 pf
Output ........................................ 5.0 5.0 pf
Grid to Plate ................................. 0.004 0.005 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ TungSol DS 11/53
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 125 V
Plate Dissipation ............................. 3.0 W
Grid No. 2 Dissipation ........................ 0.4 W
Cathode Current ............................... 14 mA

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ TungSol DS 11/53
Plate Voltage ................................. 250 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 700K Ω
Transconductance .............................. 2000 µ
Plate Current ................................. 9 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -35 V

Class A Amplifier
Source ........................................ TungSol DS 11/53
Plate Voltage ................................. 125 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 180K Ω
Transconductance .............................. 2350 µ
Plate Current ................................. 13 mA
Grid No. 2 Current ............................ 5 mA

Class A Amplifier
Source ........................................ TungSol DS 11/53
Plate Voltage ................................. 100 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 120K Ω
Transconductance .............................. 2350 µ
Plate Current ................................. 13 mA
Grid No. 2 Current ............................ 5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -35 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, 08 Feb 2023 23:45:21 -0700