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).
The arrival of rectifying valves and leaflets for H.T. D.C. insulation tests.
| Identifier | ExFiles\Box 41\2\ Scan042 | |
| Date | 15th December 1926 | |
| X3646. EFC. from Wd.{Mr Wood/Mr Whitehead} Wd{Mr Wood/Mr Whitehead}3/NJ15.12.26. Rectifying Valve for H.T. D.C. Insulation Tests. I understand that the one U.3 and one U.4 Osram Rectifying Valves called for by yours EFC1/T8.12.26 have arrived here and instructions have been given that they are to be handed to you. This morning we have received from the General Electric Co., Birmingham, the attached two leaflets dealing with the U.3 and U.4 Rectifying Valves. They think you will find these useful. 2 Leaflets att. Wd.{Mr Wood/Mr Whitehead} Wd.{Mr Wood/Mr Whitehead} [Stamp] RECEIVED DEC 15 1926 | ||