NJ7P SQL Tube Database Query

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1A4P
Remote-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 1B4
Substitutes ................................... 1C4 1K4
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass type used in battery-operated receivers as rf or if amplifier. Requires 4-contact socket.

Source ........................................ RCA RC-15 - 1947
This type was made as a pentode (1A4P and a tetrode (1A4T). The 1A4 was a pentode.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... ST-12
Base Type ..................................... 4-Pin Socket
EIA Outline ................................... 12-6
EIA Base ...................................... 4M

Electrical Data

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

Source ........................................ RCA RC-15 - 1947
For other characteristics and typical operation, see 1D5GP

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

Sat, 25 Mar 2023 19:10:09 -0700