NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

12EC8
Medium-Mu Triode - Semiremote Cutoff Pentode

EIA Base & Outline

EIA Base: 9FAEIA Bulb: 6-2
Source ........................................ ARRL HB - 1964

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9FA
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 10-16 V
Heater Current ................................ 0.225 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ ARRL HB - 1964
Input ......................................... 4.6 pf
Output ........................................ 2.6 pf
Grid to Plate ................................. 0.02 pf

Triode
Source ........................................ ARRL HB - 1964
Input ......................................... 2.6 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.7 pf

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 16 V
Grid No. 1 Voltage ............................ -2.2 V
Amplification Factor .......................... 25
Plate Resistance (approx) ..................... 6K Ω
Transconductance .............................. 4700 µMho
Plate Current ................................. 2.4 mA

Pentode Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 16 V
Grid No. 2 Voltage ............................ 12.6 V
Grid No. 1 Voltage ............................ -1.6 V
Plate Resistance (approx) ..................... 750K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 0.66 mA

A horizontal ribbon.

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A horizontal ribbon.

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Fri, 03 Feb 2023 00:00:34 -0700