NJ7P SQL Tube Database Query

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1D5G
Remote-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 1E5

Application

Glass octal type used in battery-operated receivers as rf or if amplifier. Requires octal socket.

This type was made as a pentode (1D5GP and a tetrode (1D5GT). The 1D5G was a pentode.

Mechanical Data

Bulb .......................................... ST-12
Base Type ..................................... Octal
EIA Outline ................................... 12-8
EIA Base ...................................... 5Y

Electrical Data

Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 5.0 pf
Output ........................................ 11.0 pf
Grid to Plate ................................. 0.007 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Positive Grid No. 1 Voltage ................... -3 V
Plate Input ................................... W
Plate Dissipation ............................. W
Grid No. 2 Dissipation ........................ W
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. Ω
Self Bias .................................. Ω
Bulb Temperature (At Hottest Point) ........... °C

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 720 µ
Plate Current ................................. 2.2 mA
Grid No. 2 Current ............................ 0.9 mA

Class A Amplifier
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 750 µ
Plate Current ................................. 2.3 mA
Grid No. 2 Current ............................ 0.8 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

Mon, 30 Jan 2023 00:50:04 -0700