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CV2479 noise tube

This valve measures 166x15mm overall

This is a gas filled, low current noise tube.

Heater voltage6.3V
Heater current1.0A
Max striking voltage (in mount)1150V
Normal voltage drop across valve *50V
Preferred operating current35mA
Min operating current25mA
Max operating current50mA
Min series resistance1500 ohms
Nominal noise power available **15.25dB
Nominal noise power output change *** with current0.03dB/mA
Useful frequency range9GHz to 18GHz

*: The value quoted is that which is obtained with Ia = 35mA. It is essential that the energy available for striking the tube exceeds the minimum value of 2 x 10-3 joules.

**: Given as a reference to thermal noise at 17°C.

***: The EVS sheet says 'charge' here but change sounds more likely.

The heater/cathode connection is indicated by a white spot.


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