NJ7P SQL Tube Database Query

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7720
Metal-Ceramic Triode

EIA Base & Outline

Source ........................................ GE1

Application

The 7720 is a high-mu triode of ceramic-and-metal planar construction primarily intended for use as an oscillator in the UHF range.

Mechanical Data

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.24 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 1.8 pf
Output ........................................ 0.032 pf
Grid to Plate ................................. 1.3 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier (450 MHz)
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -3.5 V
Grid No. 1 Current ............................ 0.5 mA
Plate Current ................................. 4 mA
Power Output (approx) ......................... 0.1 W

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Sun, 26 Jun 2022 04:08:00 -0700