home
 
timeline

B5

new
 
{museum features}
 
equivalents
 
articles
The Dawn of Broadcasting in the UK
collections
HMS Collingwood Museum
The B5 triode is from the mid 1920s and is marked with the BBC stamp. The base is B4 and the filament required 3 Volts. The envelope is opaque an no details are visible above the pinch.
The balloon envelope is 35 mm in diameter and, excluding the B4 base pins, is 83 mm tall.
 
Pin Connections