NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

6084
Pentode

EIA Base & Outline

EIA Base: 9BJEIA Bulb: 6-20
Source ........................................ Phillips

Application

Premium miniature type used as a high-gain amplifier. Requires miniature 9-contact socket.

Mechanical Data

EIA Outline ................................... 6-20
EIA Base ...................................... 9BJ

Electrical Data

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

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 5.0 pf
Output ........................................ 7.3 pf
Grid to Plate ................................. 0.025 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 200 V
Plate Dissipation ............................. 1.3 W
Grid No. 2 Dissipation ........................ 0.4 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 3300 Ω
Amplification Factor .......................... 120
Plate Current ................................. 0.29 mA
Grid No. 2 Current ............................ 0.07 mA

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 1500 Ω
Amplification Factor .......................... 175
Plate Current ................................. 0.8 mA
Grid No. 2 Current ............................ 0.17 mA

Class A Amplifier
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 1200 Ω
Amplification Factor .......................... 190
Plate Current ................................. 0.98 mA
Grid No. 2 Current ............................ 0.2 mA

A horizontal ribbon.

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A horizontal ribbon.

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Mon, 03 Oct 2022 16:46:21 -0700