NJ7P SQL Tube Database Query

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3B7
UHF Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 7BEEIA Bulb: 9-30

Substitute Data

Preferred Substitutes ......................... 1291
Source ........................................ ARRL HB - 1947

Mechanical Data

Source ........................................ ARRL HB - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-In 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 7BE

Electrical Data

Source ........................................ ARRL HB - 1947
Filament Voltage .............................. 1.4/2.8 DC V
Filament Current .............................. 0.22/0.11 A

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 21
Plate Resistance (approx) ..................... 11350 Ω
Transconductance .............................. 1850 µMho
Plate Current ................................. 5.2 mA

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Sat, 25 Jun 2022 15:56:28 -0700