NJ7P SQL Tube Database Query

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6851
High-Mu Twin Triode

EIA Base & Outline

Mechanical Data

EIA Outline ................................... 6-2
EIA Base ...................................... 9A

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.25 A

Direct Interelectrode Capacitances (approx)

Triode 1
Input ......................................... 1.6 pf
Output ........................................ 0.46 pf
Grid to Plate ................................. 1.4 pf

Triode 2
Input ......................................... 1.6 pf
Output ........................................ 0.36 pf
Grid to Plate ................................. 1.4 pf

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.0 W

Triode 2
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 3.1K Ω
Amplification Factor .......................... 70
Plate Resistance (approx) ..................... 60K Ω
Transconductance .............................. 1200 µ
Plate Current ................................. 1.0 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

Tue, 21 Mar 2023 03:40:14 -0700