NJ7P SQL Tube Database Query

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6HJ8
Diode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9CYEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 6AM8
Source ........................................ GE - 1973

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9CY
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ GE - 1973
Input ......................................... 7 pf
Output ........................................ 3.2 pf
Grid to Plate ................................. 0.015 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE - 1973
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 3.2 W
Grid No. 2 Dissipation ........................ 0.55 W

Diode
Source ........................................ GE - 1973
Voltage Drop @ Current ........................ 10 V @ 50 mA

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 9300 µMho
Plate Current ................................. 11.5 mA
Grid No. 2 Current ............................ 3.6 mA

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Sat, 02 Jul 2022 07:01:19 -0700