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A horizontal ribbon.

6771
High-Mu Triode

EIA Base & Outline

EIA Base: 6442
Source ........................................ GE1

Application

The 6771 is a high-mu, metal-and-ceramic triode intended for operation as a grounded-grid oscillator, radio-frequency power amplifier, or frequency multiplier at frequencies as high as 4000 MHz.

The 6771 is also useful as a plate-pulsed, grounded-grid oscillator at frequencies as high as 5000 MHz.

Features of the 6771 include small size, planar electrode construction with close spacing, inherent rigidity, an envelope structure convenient for coaxial circuit applications, and excellent resistance to vibration and shock.

Mechanical Data

EIA Base ...................................... 6442

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.575 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 4.05 pf
Output ........................................ 0.018 pf
Grid to Plate ................................. 2.03 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 6.25 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -1.6 V
Amplification Factor .......................... 90
Transconductance .............................. 23000 µMho
Plate Current ................................. 25 mA

Class C Oscillator/Amplifier
Plate Voltage ................................. 275 V
Grid No. 1 Voltage ............................ -25 V
Grid No. 1 Current ............................ 8 mA
Plate Current ................................. 25 mA

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -25 V
Grid No. 1 Current ............................ 8 mA
Plate Current ................................. 22 mA

Class C Multiplier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -50 V
Grid No. 1 Current ............................ 5 mA
Plate Current ................................. 20 mA

Class C Oscillator/Amplifier-Pulsed (5000 MHz)
Plate Voltage ................................. 1750 V
Grid No. 1 Voltage ............................ -75 V
Grid No. 1 Current ............................ 700 mA
Plate Current ................................. 1250 mA

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Thu, 18 Aug 2022 15:33:39 -0700