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English Electric BR1121 power triode valve.

This valve stands 380mm high and measures 190mm across the heatsink and 150mm across the glass section. It weighs approximately 16kg.

BR1121 pin detail
The filament connection is via two large pins on top, each of which has a glass section to insulate it from the grid connection.

The label shows the English Electric logo, plus:
Type BR1121
No. 1171/UJ
Fil.Volts 6.6V

 BR1121
BR1121 glas section
The glass section is shown above.
BR1121 top view
Top view of the valve showing filament connections, a large metal exhaust seal, and the lifting handles.

BR1121 inside view
A view down inside the valve, though there is little visible due to its construction.

 

This file was last modified 15:39:40, Saturday November 12, 2011