NJ7P SQL Tube Database Query

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6C4
Medium-Mu Triode

EIA Base & Outline

EIA Base: 6BGEIA Bulb: 5-2

Substitute Data

Preferred Substitutes ......................... 6135
Substitutes ................................... 6AB4 6DR4
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in compact radio equipment as a local oscillator in FM and other high-frequency circuits. It may also be used as a class C rf amplifier.

Source ........................................ RCA RC-29 - 1975
In such service it delivers a power output of 5.5 watts at moderate frequencies, and 2.5 watts at 150 MHz. Tube requires miniature 7-contact socket and may be mounted in any position.

Source ........................................ RCA RC-29 - 1975
For additional curve of plate characteristics, refer to 12AU7A.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 6BG
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 1.8 pf
Output ........................................ 1.3 pf
Grid to Plate ................................. 1.6 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 3.5 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ 0 V
Amplification Factor .......................... 19.5
Plate Resistance (approx) ..................... 6250 Ω
Transconductance .............................. 3100 µMho
Plate Current ................................. 11.8 mA

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -8.5 V
Amplification Factor .......................... 17
Plate Resistance (approx) ..................... 7700 Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 10.5 mA

Class C Amplifier/Oscillator
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Grid No. 1 Voltage ............................ -27 V
Grid No. 1 Current ............................ 7.0 mA
Plate Current ................................. 25 mA
Driving Power ................................. 0.35 W
Power Output (approx) ......................... 5.5 W

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Sun, 26 Jun 2022 05:20:38 -0700