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CV445 / 5J/180E air cooled pentode

Size
 This valve measures 190x220mm overall, 90x145mm across the anode radiator. It has a 6 pin base.

This is an air blast cooled pentode transmitting valve. It has a thoriated tungsten filament.

Filament voltage9.0V
Filament current30.0A
Max direct anode voltage6.0kV
Max direct anode current2.5A
Max anode dissipation3.5kW
Max direct screen voltage1.5kV
Max direct screen current250mA
Mutual conductance *6.0mA/V
Amplification factor *5.0
Max frequency for above ratings30MHz
Capacitances
Cag0.6pF
Cin32.0pF
Cout21.0pF

*: measured at Va=6kV, Vg2=1.5kV, Ia=0.5A
PinFunction
1Suppressor grid
2Filament
3Screen grid
4Filament
5Suppressor grid
6Control grid
-Anode clamp

CV445
top view

This file was last modified23:10:30, Wednesday February 23, 2022