NJ7P SQL Tube Database Query

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6U8
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9AEEIA Bulb: 6-2
Source ........................................ TungSol
9496

Application

Source ........................................ TungSol
Miniature type used as combined oscillator and mixer tube in color and black-and-white television receivers utilizing an intermediate frequency in the order of 40 MHz. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ TungSol
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9AE
Mounting Position ............................. Any

Electrical Data

Source ........................................ TungSol
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ TungSol
Input ......................................... 5 pf
Output ........................................ 2.6 pf
Grid to Plate ................................. 0.01 pf

Triode
Source ........................................ TungSol
Input ......................................... 2.5 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ TungSol
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.8 W

Pentode
Source ........................................ TungSol
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.7 W
Grid No. 2 Dissipation ........................ 0.5 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Amplification Factor .......................... 40
Plate Resistance (approx) ..................... 5K Ω
Transconductance .............................. 8500 µMho
Plate Current ................................. 18 mA

Pentode Class A Amplifier
Source ........................................ TungSol
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 5200 µMho
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 3.5 mA

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This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

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(c) 1994-2015 by William A. Beech, NJ7P

Tue, 21 Nov 2017 16:05:29 -0700

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