NJ7P SQL Tube Database Query

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954
Detector Amplifier Pentode

EIA Base & Outline

EIA Base: 5BBEIA Bulb: 4-3
Source ........................................ GE - 1973

Mechanical Data

EIA Outline ................................... 4-3
EIA Base ...................................... 5BB

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.4 pf
Output ........................................ 3 pf
Grid to Plate ................................. 0.007 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Plate Dissipation ............................. 1.5 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 1400 µMho
Plate Current ................................. 2 mA
Grid No. 2 Current ............................ 0.7 mA

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -3 V
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 1100 µMho
Plate Current ................................. 1.2 mA
Grid No. 2 Current ............................ 0.5 mA

Detector Ic=0.1ma
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -6 V
Load Resistance ............................... 250K Ω

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Wed, 29 Mar 2023 07:09:43 -0700