NJ7P SQL Tube Database Query

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3A5
Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 7BCEIA Bulb: 5-2
Source ........................................ RCA RC-29 - 1975

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-5 1/2
EIA Outline ................................... 5-2
EIA Base ...................................... 7BC

Electrical Data

Source ........................................ RCA RC-29 - 1975
Filament Voltage .............................. 2.8/1.4 DC V
Filament Current .............................. 0.11/0.22 A

Direct Interelectrode Capacitances (approx)

Each Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 0.9 pf
Output ........................................ 1.0 pf
Grid to Plate ................................. 3.2 pf

Maximum Ratings (Design Center Values)

Each Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 135 V
Plate Dissipation ............................. 1 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ -2.5 V
Amplification Factor .......................... 15
Plate Resistance (approx) ..................... 8.3K Ω
Transconductance .............................. 1800 µMho
Plate Current ................................. 3.7 mA

Push Pull Class C Oscillator/Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 135 V
Grid No. 1 Voltage ............................ -20 V
Grid No. 1 Current ............................ 5 mA
Plate Current ................................. 30 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 2 W

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Tue, 28 Jun 2022 01:39:32 -0700