NJ7P SQL Tube Database Query

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6FD7
Twin Triode

EIA Base & Outline

EIA Base: 9HFEIA Bulb: 9-77

Substitute Data

Preferred Substitutes ......................... 6DE7 6EW7 6FR7
Substitutes ................................... 6DR7
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type containing high-mu and low-mu triode units used as combined vertical-deflection oscillator and vertical-deflection amplifier in television receivers. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-9
EIA Outline ................................... 9-77
EIA Base ...................................... 9HF

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.925 A

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.2 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 4.5 pf

Triode 2
Source ........................................ RCA RC-29 - 1975
Input ......................................... 6.5 pf
Output ........................................ 0.2 pf
Grid to Plate ................................. 10 pf

Maximum Ratings (Design Center Values)

Triode 1
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.5 W

Triode 2
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 10 W

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 64
Plate Resistance (approx) ..................... 40K Ω
Transconductance .............................. 1600 µMho
Plate Current ................................. 1.5 mA

Triode 2 Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -17.5 V
Amplification Factor .......................... 6
Plate Resistance (approx) ..................... 800 Ω
Transconductance .............................. 7500 µMho
Plate Current ................................. 40 mA

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Sun, 28 Nov 2021 23:08:23 -0700