Virtual Valve Museum

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CV1198 / NR94 triode (including CV1190)

Size This valve measures 121x40mm overall and has a 5-pin base.

In matched pairs, two CV1198's are bundled as CV1190.

Heater voltage 4V
Heater current 1.1A
Max anode voltage 700V
Mutual conductance * 7mA/V
Amplification factor * 20
Anode impedance * 2800 ohms
Capacitances
Cae 4.4pF
Cge 8.4pF
Cag 5.7pF

*: At Va=100, Vg=0.

Pin Function
1 n/c
2 Grid
3 Heater
4 Heater
5 Cathode
TC Anode
CV1198
NR94
CV1190 is a matched pair of CV1198 valves packed together, as shown in the photo below. The criteria for selection is that the grid voltages do not differ by more than 0.5V with an anode voltage of 1kV applied through 100k ohms and an anode current of 4.75mA.
CV1190 box
Box photo by John Kaesehagen