NJ7P SQL Tube Database Query

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6EW7
Twin Triode

EIA Base & Outline

EIA Base: 9HFEIA Bulb: 9-70

Substitute Data

Preferred Substitutes ......................... 6DE7
Substitutes ................................... 6DR7 6FD7 6FR7
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used as combined vertical-deflection oscillator and vertical-deflection amplifier in television receivers. Requires miniature 9-contact socket. For curve of average plate characteristics, unit 1, refer to 6DE7 (unit 1).

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-9 Special
Base Type ..................................... Same as Miniature Button 9-pin Except Diameter of Bulb
EIA Outline ................................... 9-71
Maximum Diameter .............................. 1-1/8 In.
EIA Base ...................................... 9HF
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.9 A

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.2 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 4.2 pf

Triode 2
Source ........................................ RCA RC-29 - 1975
Input ......................................... 7 pf
Output ........................................ 1.2 pf
Grid to Plate ................................. 9 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 ............................ -11 V
Amplification Factor .......................... 17.5
Plate Resistance (approx) ..................... 8.75K Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 5.5 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 ................................. 45 mA

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Fri, 30 Sep 2022 06:57:13 -0700