ID: 
1993
Maker's Name: 
AWV Radiotron
Where made: 
Australia
Dimensions: 
5.3 × 5.3 × 18.8 cm

This valve was used in apparatus that supplied relevant voltages to the electrodes. It demonstrates visually the action of the triode with varying electrode voltages.

The unit has a filamentary cathode, flat open-wire control grid and flat anode with a fluorescent coating. The anode fluoresces green under electron bombardment.