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The NR8 is a Mullard horned valve and was made for the British Navy as a receiving valve. We do not know if a civilian equivalent exists. The valve is dated to 1922.
The electrode structure is conventional apart from the anode and grid being taken to the horns rather than the base. The filament is a single strand at the centre of the anode. The grid is helical and the anode is a thin bright cylinder.
The balloon envelope is 51 mm in diameter and, excluding the B4 base pins, is 90 mm tall.
This exhibit was last updated on 02 December 2007
The electrode structure is conventional apart from the anode and grid being taken to the horns rather than the base. The filament is a single strand at the centre of the anode. The grid is helical and the anode is a thin bright cylinder.
The balloon envelope is 51 mm in diameter and, excluding the B4 base pins, is 90 mm tall.
This exhibit was last updated on 02 December 2007
This exhibit was last updated on 02 December 2007
This exhibit was last updated on 02 December 2007 |