NJ7P SQL Tube Database Query

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1C7G
Pentagrid Converter

EIA Base & Outline

EIA Base: 7ZEIA Bulb: 12-8

Substitute Data

Preferred Substitutes ......................... 1D7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used in battery-operated receivers. Tube requires octal socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... ST-12
Base Type ..................................... Octal
EIA Outline ................................... 12-8
EIA Base ...................................... 7Z

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.12 A

Maximum Ratings (Design Center Values)

Pentagrid Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 180 V
Grid No. 2 & 4 Supply Voltage (Screen) ........ 140 V
Grid No. 2 & 4 Dissipation (Screen) ........... 180 W
Grid No. 3 Voltage
Negative Bias Value ........................ 180 V

Characteristics and Typical Operation

Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 180 V
Grid No. 1 Voltage (RMS) ...................... 140 V
Grid No. 1 Bias Voltage ....................... 180 V
Conversion Transconductance ................... -3 µMho
Plate Current ................................. 50K mA

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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.

Please enter the tube number:

This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

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

Thu, 29 Sep 2022 22:30:19 -0700