NJ7P SQL Tube Database Query

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2C39A
High-Mu Power Triode

EIA Base & Outline

Application

Source ........................................ RCA TT-5 - 1962
Forced-air-cooled type used as rf power amplifier, oscillator, and frequency multiplier. May be used at full input up to 2500 MHz and at higher frequencies in cathode-drive circuits of the coaxial-cylinder type.

Source ........................................ RCA TT-5 - 1962
Class C Telegraphy maximum CCS plate dissipation, 100 watts. Requires special mounting which should support the tube by the plate-terminal flange only. May be operated in any position.

Source ........................................ RCA TT-5 - 1962
Flexible connectors of the spring-contact type are required for all terminal connections.

Mechanical Data

Source ........................................ RCA TT-5 - 1962
Bulb .......................................... Special
Base Type ..................................... Metal & Ceramic
Maximum Overall Height ........................ 2.750 In.
Maximum Diameter .............................. 1.260 In.
EIA Base ...................................... 2C39B

Electrical Data

Source ........................................ RCA TT-5 - 1962
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.0 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ RCA TT-5 - 1962
Input ......................................... 6.5 pf
Output ........................................ 0.035 pf
Grid to Plate ................................. 1.9 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ RCA TT-5 - 1962
Plate Voltage ................................. 1000 V
Plate Dissipation ............................. 100 W
Bulb Temperature (At Hottest Point) ........... 175 °C

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Source ........................................ RCA TT-5 - 1962
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 125 mA
Power Output (approx) ......................... 40 W

Class C Modulated Amplifier (Plate - CCS)
Source ........................................ RCA TT-5 - 1962
Plate Voltage ................................. 600 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 100 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, 18 Aug 2022 15:40:07 -0700