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6EU7
Twin Triode

Base & Bulb ( RCA RC-29 - 1975)

Application

Miniature type used ain high-gain, resistance-coupled, low-level audio-amplifier applications where low hum and non-microphonic characteristics are important, such as microphone amplifiers and preamplifiers for phonographs. Requires miniature 9-contact socket.

Mechanical Data

Bulb .......................................... T-6 1/2
Base .......................................... Miniature Button 9-Pin
Outline ....................................... 6-2
EIA Base ...................................... 9LS
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Each Triode
Input ......................................... 1.6 pf
Output ........................................ 0.2 pf
Grid to Plate ................................. 1.5 pf

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.2 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ -1 V
Amplification Factor .......................... 100
Plate Resistance (approx) ..................... 80K Ω
Transconductance .............................. 1250 µ
Plate Current ................................. 0.5 mA

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 100
Plate Resistance (approx) ..................... 62.5K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 1.2 mA

Characteristic Curves

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