NJ7P SQL Tube Database Query

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1E5GP
Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 5YEIA Bulb: 12-8

Substitute Data

Preferred Substitutes ......................... 1D5
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used as rf amplifier or detector in battery-operated receivers. Tube requires octal socket.

Source ........................................ RCA RC-15 - 1947
This type was made as a pentode (1E5GP and a tetrode (1E5GT).

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... ST-12
Base Type ..................................... Octal
EIA Outline ................................... 12-8
EIA Base ...................................... 5Y

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Direct Interelectrode Capacitances (approx)

5.0
Source ........................................ RCA RC-15 - 1947
Input ......................................... 11.0 pf
Output ........................................ 0.007 pf
Grid to Plate ................................. pf

Maximum Ratings (Design Center Values)

180
Source ........................................ RCA RC-15 - 1947
Grid No. 2 Supply Voltage ..................... 67.5 V
Grid No. 2 Voltage ............................ V
Negative Grid No. 1 Voltage ................... V
Positive Grid No. 1 Voltage ................... 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
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 600 µMho
Plate Current ................................. 1.6 mA
Grid No. 2 Current ............................ 0.7 mA

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 1.3M Ω
Transconductance .............................. 650 µMho
Plate Current ................................. 1.7 mA
Grid No. 2 Current ............................ 0.6 mA
Grid No. 1 Voltage for Ib ..................... 0 µa @ -8 V

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(c) 1994-2021 by William A. Beech, NJ7P

Tue, 24 May 2022 01:38:51 -0700