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The 7720 is a high-mu triode of ceramic-and-metal planar construction primarily intended for use as an oscillator in the UHF range.
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.24 A
Triode
Input ......................................... 1.8 pf
Output ........................................ 0.032 pf
Grid to Plate ................................. 1.3 pf
Triode
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1.0 W
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
If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.
(c) 1994-2021 by William A. Beech, NJ7P
Mon, 30 Jan 2023 01:03:08 -0700