ID: 
2104
Maker's Name: 
Standard Telephones and Cables P/L
Where made: 
Australia
Dimensions: 
14.2 × 10 × 51.5 cm

This triode valve sat in a watercooling jacket. It is a high impedance valve with Tungsten filament. Typical anode voltage was 12kV.

It was used in broadcasting stations eg 4LM shortwave.