NJ7P SQL Tube Database Query

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6BF7
Medium-Mu Twin Triode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6BG7
Substitutes ................................... 6947 7079 7963
Source ........................................ TungSol DS 08/01/53

Application

Source ........................................ TungSol DS 08/01/53
Subminiature type used in similar function to type 6J6, but provides added flexability from use of separate cathode leads and the compact construction.

Mechanical Data

Source ........................................ TungSol DS 08/01/53
Bulb .......................................... T-3
Base Type ..................................... Subminiature Button flexable leads
EIA Outline ................................... 3-2
EIA Base ...................................... 8DG
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ TungSol DS 08/01/53
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage ................ 90 V

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ TungSol DS 08/01/53
Shielded Unshielded
Input ......................................... 2.0 2.0 pf
Output ........................................ 0.28 1.6 pf
Grid to Plate ................................. 1.5 1.5 pf

Triode 2
Source ........................................ TungSol DS 08/01/53
Shielded Unshielded
Input ......................................... 2.0 2.0 pf
Output ........................................ 0.3 2.0 pf
Grid to Plate ................................. 1.5 1.5 pf

Maximum Ratings (Design Center Values)

Each Triode
Source ........................................ TungSol DS 08/01/53
Plate Voltage ................................. 110 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ TungSol DS 08/01/53
Plate Voltage ................................. 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 100 Ω
Amplification Factor .......................... 35
Plate Resistance (approx) ..................... 7K Ω
Transconductance .............................. 4800 µ
Plate Current ................................. 8.0 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -7.5 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

Thu, 02 Feb 2023 23:04:46 -0700