NJ7P SQL Tube Database Query

A horizontal ribbon.

Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.

A horizontal ribbon.

1A4
Remote-Cutoff Pentode

EIA Base & Outline

EIA Base: 4MEIA Bulb: 12-6
Source ........................................ RCA RC-13 - 1937

Application

Source ........................................ RCA RC-13 - 1937
Glass type used in battery-operated receivers as rf or if amplifier. Requires 4-contact socket.

Source ........................................ RCA RC-13 - 1937
This type was made as a pentode (1A4P and a tetrode (1A4T). The 1A4 was a pentode.

Mechanical Data

Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-12
Base Type ..................................... Small 4-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 4M
Top Cap ....................................... Small Metal

Electrical Data

Source ........................................ RCA RC-13 - 1937
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-13 - 1937
Input ......................................... 5 pf
Output ........................................ 11 pf
Grid to Plate ................................. 0.007 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 425
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 720 µMho
Plate Current ................................. 2.2 mA
Grid No. 2 Current ............................ 0.9 mA

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 750
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 750 µMho
Plate Current ................................. 2.3 mA
Grid No. 2 Current ............................ 0.8 mA

A horizontal ribbon.

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

A horizontal ribbon.

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

Thu, 18 Aug 2022 17:11:22 -0700