From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Request to obtain one Tungsten type 53 Barium rectifier valve for a radio.
| Identifier | ExFiles\Box 168b\1\ img251 | |
| Date | 16th April 1940 | |
| file 6153 To burr. c. to Rm{William Robotham - Chief Engineer}/RC{R. Childs}/ICT. R.{Sir Henry Royce}/RC.{R. Childs}12/JH.16.4.40. re Radio. Will you please obtain as soon as possible, from the Lustraphone Ltd., Newton Street, High Holborn, LONDON. W.C.2. one Tungsten type 53 Barium rectifier valve. Ra/RC.{R. Childs} | ||