NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

5670
Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 8CJEIA Bulb: 6-1

Substitute Data

Preferred Substitutes ......................... 2C51
Source ........................................ GE - 1973

Application

A high-frequency double triode using the 9-pin miniature construction. It may be used as an amplifier, mixer, oscillator or multivibrator over a frequency range AF through VHF.

It is designed for reliable life under conditions of intermittent operation. Special 2C51.

Mechanical Data

EIA Outline ................................... 6-1
EIA Base ...................................... 8CJ

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.35 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 2.2 pf
Output ........................................ 1.0 pf
Grid to Plate ................................. 1.1 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.4 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 240 Ω
Amplification Factor .......................... 35
Transconductance .............................. 5500 µMho
Plate Current ................................. 8.2 mA

Class AB1 Amplifier
Plate Voltage ................................. 300 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 800 Ω
Plate Current (Zero Signal) ................... 4.9 mA
Plate Current (Maximum Signal) ................ 6.3 mA
Load Resistance ............................... 27K Ω
Power Output (approx) ......................... 1.0 W

A horizontal ribbon.

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A horizontal ribbon.

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Wed, 30 Nov 2022 03:57:33 -0700