NJ7P SQL Tube Database Query

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5590
RF Pentode

EIA Base & Outline

EIA Base: 7BDEIA Bulb: 5-1
Source ........................................ GE - 1973

Mechanical Data

EIA Outline ................................... 5-1
EIA Base ...................................... 7BD

Electrical Data

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

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.4 pf
Output ........................................ 2.9 pf
Grid to Plate ................................. 0.01 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 140 V
Plate Dissipation ............................. 1.7 W
Grid No. 2 Dissipation ........................ 0.5 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 820 Ω
Plate Resistance (approx) ..................... 300K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 3.9 mA
Grid No. 2 Current ............................ 1.4 mA

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Thu, 30 Jun 2022 04:35:47 -0700