NJ7P SQL Tube Database Query

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2C21
Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 7BHEIA Bulb: 12-6
Source ........................................ ARRL HB - 1948

Mechanical Data

Source ........................................ ARRL HB - 1948
EIA Outline ................................... 12-6
EIA Base ...................................... 7BH

Electrical Data

Source ........................................ ARRL HB - 1948
Filament Voltage .............................. 6.3 V
Filament Current .............................. 0.6 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ ARRL HB - 1948
Input ......................................... 1.6 pf
Output ........................................ 2.0 pf
Grid to Plate ................................. 1.6 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ ARRL HB - 1948
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 5.0 W
Plate Current ................................. 40 mA
Grid Current .................................. 12 mA

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1948
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -16.5 V
Amplification Factor .......................... 10.4
Plate Resistance (approx) ..................... 7.6K Ω
Transconductance .............................. 1375 µMho
Plate Current ................................. 8.3 mA

Class C Amplifier-Oscillator
Source ........................................ ARRL HB - 1948
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -60 V
Grid No. 1 Current ............................ 12 mA
Plate Current ................................. 40 mA
Driving Power ................................. 1.0 W
Power Output (approx) ......................... 7.0 W

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Fri, 24 Jun 2022 19:16:37 -0700