NJ7P SQL Tube Database Query

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3A8GT
Diode - Triode - Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used as combined detector, af amplifier, and rf amplifier in battery-operated receivers. Requires octal socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
EIA Outline ................................... 9-17
EIA Base ...................................... 8AS

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 2.8/1.4 DC V
Filament Current .............................. 0.05/.1 A

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 65
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 325 µ
Plate Current ................................. 0.2 mA

Pentode Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 800K Ω
Transconductance .............................. 750 µ
Plate Current ................................. 1.5 mA
Grid No. 2 Current ............................ 0.5 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

Sat, 02 Jul 2022 07:36:51 -0700