NJ7P SQL Tube Database Query

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6JN8
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9FAEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 6BR8 6FV8
Substitutes ................................... 6CL8 6FG7
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used as FM converter and rf amplifier in radio receivers. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-2
EIA Base ...................................... 9FA

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 5.5 pf
Output ........................................ 3.4 pf
Grid to Plate ................................. 0.01 pf

Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 3.2 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 1.7 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.5 W
Grid No. 2 Dissipation ........................ 0.55 W

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.5 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 1 Voltage ............................ -1 V
Amplification Factor .......................... 46
Plate Resistance (approx) ..................... 5400 Ω
Transconductance .............................. 8500 µMho
Plate Current ................................. 13.5 mA

Pentode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 7500 µMho
Plate Current ................................. 12 mA
Grid No. 2 Current ............................ 4 mA

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Tue, 24 May 2022 03:15:26 -0700