NJ7P SQL Tube Database Query

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6147
RF Pentode

EIA Base & Outline

Application

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

Mechanical Data

EIA Outline ................................... 3-8
EIA Base ...................................... 6CL

Electrical Data

Filament Voltage .............................. 1.25/2.5 V
Filament Current .............................. 0.125/0.0.062 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 2.6 pf
Output ........................................ 3.0 pf
Grid to Plate ................................. 0.055 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 125 V
Plate Dissipation ............................. 1.5 W
Grid No. 2 Dissipation ........................ 0.6 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -7.5 V
Plate Resistance (approx) ..................... 175K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 5.5 mA
Grid No. 2 Current ............................ 0.9 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 05:18:45 -0700