NJ7P SQL Tube Database Query

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2C39B
High-Mu Power Triode

EIA Base & Outline

Application

Source ........................................ GE1
The 2C39B is a metal-and-ceramic, High-mu triode for use as a grounded-grid oscillator or amplifier at frequencies as high as 2500 MHz.

Source ........................................ GE1
Features of the 2C39B include planar electrode construction, high plate dissipation capability, excellent electrode isolation, low radio-frequency losses, high transconductance, and low interelectrode capacitances.

Mechanical Data

Source ........................................ GE1
Bulb .......................................... Special
Base Type ..................................... Metal & Ceramic
Maximum Overall Height ........................ 2.750 In.
Maximum Diameter .............................. 1.260 In.
EIA Base ...................................... 2C39B

Electrical Data

Source ........................................ GE1
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.03 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ GE1
Input ......................................... 6.5 pf
Output ........................................ 0.023 pf
Grid to Plate ................................. 2.01 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ GE1
Plate Voltage ................................. 1000 V
Plate Dissipation ............................. 70 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier (500 MHz)
Source ........................................ GE1
Plate Voltage ................................. 900 V
Grid No. 1 Voltage ............................ -40 V
Grid No. 1 Current ............................ 30 mA
Plate Current ................................. 90 mA
Power Output (approx) ......................... 40 W

Class C Oscillator/Amplifier (2500 MHz)
Source ........................................ GE1
Plate Voltage ................................. 900 V
Grid No. 1 Voltage ............................ -22 V
Grid No. 1 Current ............................ 27 mA
Plate Current ................................. 90 mA
Power Output (approx) ......................... 17 W

Class C Oscillator/Amplifier
Source ........................................ GE1
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 75 mA

Class C Modulated Amplifier (Plate)
Source ........................................ GE1
Plate Voltage ................................. 600 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 50 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, 11 Aug 2022 13:41:09 -0700