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2H21 phasitron

Size
This valve measures 112x42mm overall and has an 11 pin base

Heater voltage 6.3V
Heater current 300mA
Max anode 1 voltage 300V
Max anode 2 voltage 300V
Max deflector 1, 2 and 3 voltage 100V
Max deflector 4 voltage 100V
Max grid 1 voltage 25V
Max grid 2 voltage 150V
Max cathode current 6mA
Capacitances
Deflectors to anode 1 0.08pF
Anode 1 to Anode 2 4pF
Max frequency 500kHz
Typical operation
Anode 1 voltage 200V
Anode 2 voltage 250V
Deflector 1, 2 and 3 voltage 75V
Deflector 4 voltage 60V
Grid 1 voltage 10V
Grid 2 voltage 25V
Cathode current 4mA
RF drive voltage, phase to neutral 35V RMS
Audio modulating power for 180 degree phase angle 50mW
RF output voltage 4V RMS
Distortion at 180 degree phase angle 1.4%

See also 5593. For further information see: the Phasitron pages

Inside view

2H21

Pin Function
1 i/c
2 Deflector 4
3 Deflector 1
4 Deflector 2
5 Deflector 3
6 Grid 1
7 Grid 2
8 Anode 1
9 Anode 2
10 Heater
11 Heater + cathode
Base view

This file was last modified15:35:45, Tuesday September 02, 2014