NJ7P SQL Tube Database Query

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9CL8
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9FXEIA Bulb: 6-2

Mechanical Data

Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9FX
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 9.5 V
Heater Current ................................ 0.3 A

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Amplification Factor .......................... 40
Plate Resistance (approx) ..................... 5000 Ω
Transconductance .............................. 8000 µMho
Plate Current ................................. 15 mA

Pentode Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 5800 µMho
Plate Current ................................. 12 mA
Grid No. 2 Current ............................ 4 mA

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(c) 1994-2021 by William A. Beech, NJ7P

Wed, 30 Nov 2022 03:25:53 -0700