NJ7P SQL Tube Database Query

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5844
Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 7BFEIA Bulb: 5-2
Source ........................................ GE - 1973

Mechanical Data

EIA Outline ................................... 5-2
EIA Base ...................................... 7BF

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Triode 1
Input ......................................... 2.4 pf
Output ........................................ 0.5 pf
Grid to Plate ................................. 2.7 pf

Triode 2
Input ......................................... 2.4 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 2.7 pf

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 200 V
Plate Dissipation ............................. 1.0 W

Triode 2
Plate Voltage ................................. 200 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 470 Ω
Amplification Factor .......................... 28
Plate Resistance (approx) ..................... 7550 Ω
Transconductance .............................. 3700 µMho
Plate Current ................................. 4.8 mA

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Sat, 02 Jul 2022 22:38:24 -0700