NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

3B5GT
Beam Power Amplifier

EIA Base & Outline

EIA Base: 7AQEIA Bulb: 9-12

Substitute Data

Substitutes ................................... 3C5 3Q5
Source ........................................ ARRL HB - 1947

Mechanical Data

Source ........................................ ARRL HB - 1947
Bulb .......................................... T-9
EIA Outline ................................... 9-12
EIA Base ...................................... 7AQ

Electrical Data

Source ........................................ ARRL HB - 1947
Filament Voltage .............................. 1.4/2.8 DC V
Filament Current .............................. 0.1/0.05 A

Characteristics and Typical Operation

Class A Amplifier (1.4)
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -7 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 1650 µMho
Plate Current ................................. 8.0 mA
Grid No. 2 Current ............................ 0.6 mA
Load Resistance ............................... 5K Ω
Power Output (approx) ......................... 0.2 W

Class A Amplifier (2.8)
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -7 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 1500 µMho
Plate Current ................................. 6.7 mA
Grid No. 2 Current ............................ 0.5 mA
Load Resistance ............................... 5K Ω
Power Output (approx) ......................... 0.18 W

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A horizontal ribbon.

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Sat, 26 Nov 2022 03:03:23 -0700