NJ7P SQL Tube Database Query

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6F4
Triode

EIA Base & Outline

EIA Base: 7BREIA Bulb: 4-2

Substitute Data

Substitutes ................................... 6L4
Source ........................................ ARRL HB - 1964

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-4
EIA Outline ................................... 4-2
EIA Base ...................................... 7BR

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.225 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ ARRL HB - 1964
Input ......................................... 1.9 pf
Output ........................................ 0.6 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Plate Dissipation ............................. 2.0 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 80 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 150 Ω
Amplification Factor .......................... 17
Plate Resistance (approx) ..................... 2.9K Ω
Transconductance .............................. 5800 µMho
Plate Current ................................. 13 mA

Class C Oscillator/Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -15 V
Grid No. 1 Current ............................ 7.5 mA
Plate Current ................................. 20 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 1.8 W

Class C Oscillator/Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ 550* V
Grid No. 1 Current ............................ 7.5 mA
Plate Current ................................. 20 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 1.8 W

Class C Oscillator/Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ 2000* V
Grid No. 1 Current ............................ 7.5 mA
Plate Current ................................. 20 mA
Driving Power ................................. 0.2 W
Power Output (approx) ......................... 1.8 W

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Sat, 02 Jul 2022 23:07:59 -0700