|
NR4CSensibly equivalent¶ to:R.4C
|
|
|
This NR4C has lost its base, but the electrodes are still clearly seen within the envelope. The filament is a single strand running through the centre of the anode cylinder. Between the 9 mm diameter anode and the filament is a thick wire helical grid 3 mm in diameter.The NR prefix indicates that it was made for the British Navy as a receiving valve. The number 4 indicates that this was a very early device used by the Navy.The balloon envelope is 48 mm in diameter and, 66 mm tall.Reference: 1003. |
Pin Connections
| 1 | 2 | 3 | 4 |  a | g1 | f | f |
|
|
Updated May 04, 2022.
|
|
