NJ7P SQL Tube Database Query

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2C22
Medium-Mu Triode

EIA Base & Outline

Mechanical Data

Source ........................................ ARRL HB - 1948
Bulb .......................................... T-9
Base Type ..................................... Octal
Maximum Overall Height ........................ 3.250 In.
Maximum Seated Height ......................... 2.688 In.
Maximum Diameter .............................. 1.313 In.
EIA Base ...................................... 4AM

Electrical Data

Source ........................................ ARRL HB - 1948
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ ARRL HB - 1948
Input ......................................... 2.2 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 3.6 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ ARRL HB - 1948
Plate Voltage ................................. 500 V
Plate Dissipation ............................. 3.5 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1948
Plate Voltage ................................. 300 V
Grid No. 1 Voltage ............................ -10.5 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 6.6K Ω
Transconductance .............................. 3000 µ
Plate Current ................................. 11 mA

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

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

Thu, 30 Jun 2022 16:12:25 -0700