NJ7P SQL Tube Database Query

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12BV7
Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 12BY7 12DQ7 12GN7
Source ........................................ Sylvania - 1959

Application

Source ........................................ Sylvania - 1959
Miniature type used as a video amplifier. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ Sylvania - 1959
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9BF
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ Sylvania - 1959
Heater Voltage ................................ 6.3/12.6 V
Heater Current ................................ 0.6/0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ Sylvania - 1959
Input ......................................... 10.2 pf
Output ........................................ 3.5 pf
Grid to Plate ................................. 0.063 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ Sylvania - 1959
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 ........................................ Sylvania - 1959
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Amplification Factor .......................... 1100
Plate Resistance (approx) ..................... 90K Ω
Transconductance .............................. 12K µ
Plate Current ................................. 25 mA
Grid No. 2 Current ............................ 6 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

Sat, 02 Jul 2022 07:53:52 -0700