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CV4502 reliable pentode

Size This valve measures 36x10mm overall and has a B8D base.


Heater voltage 6.3V
Heater current 200mA
Max heater cathode voltage 100V
Max anode voltage (Ia=0) 350V
Max screen voltage (Ig2=0) 350V
Max negative grid voltage 0V
Max negative suppressor voltage -100V
Max operating anode voltage 190V
Max operating screen voltage 190V
Max anode dissipation 1.5W
Max screen dissipation 1W
Max total (anode + screen) dissipation 2W
Max cathode current 14mA
Max grid circuit resistance (fixed bias) 250k ohms
Max grid circuit resistance (auto bias) 500k ohms
Max vibration (100 hours duration) 5g
Max vibration (10 minutes duration) 20g
Max shock (short duration) 500g
Max bulb temperature 165C
Max operating pressure 55mm Hg
Max ambient storage temperature -60 to +85C
Typical operating conditions
Va=Vg2=100V; Vg1=-2V; Vg3=0
Anode current 7mA
Screen current 2.4mA
Mutual conductance 5.2ma/V
Inner amplification factor 28
Capacitances (shielded)
Cin (nom) 5.pF
Cout (nom) 4.8pF
Cag1 (max) 0.15pF


Lead Function
1 Control grid
2 Suppressor grid
3 Heater
4 Anode
5 Screen grid
6 Heater
7 Cathode
8 Anode

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