NJ7P SQL Tube Database Query

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6281
Sharp-Cutoff Pentode

EIA Base & Outline

Application

Subminiature type used as a general purpose amplifier in subminiature equipment. Requires either a subminiature socket or direct soldering of the wires from the tube to circuit components.

Mechanical Data

EIA Outline ................................... 2-2
EIA Base ...................................... 2E31

Electrical Data

Heater Voltage ................................ 0.625 V
Heater Current ................................ 0.02 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 2.5 pf
Output ........................................ 3.4 pf
Grid to Plate ................................. 0.01 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 25 V
Grid No. 2 Voltage ............................ 25 V

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 15 V
Grid No. 2 Voltage ............................ 15 V
Grid No. 1 Voltage ............................ -1.0 V
Plate Resistance (approx) ..................... 2M Ω
Transconductance .............................. 105 µ
Plate Current ................................. 0.05 mA
Grid No. 2 Current ............................ 0.02 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

Wed, 29 Mar 2023 00:40:25 -0700