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 particulars on thermionic rectifying valves for H.T. rectification.
| Identifier | ExFiles\Box 60\2\ Scan068 | |
| Date | 4th January 1931 | |
| X6094 Roy. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 2/ADL4.1.31. X.6094. THERMIONIC RECTIFYING VALVE FOR H.T. Some time ago we asked you to obtain for us from various firms particulars of H.T. rectifying valves, the result of which being that we found nothing suitable for our purpose. We are now, however, advised by Mr. E.A.Watson of The M.L. Magneto Syndicate Ltd. that a suitable valve for this purpose is the B.T.H. U3. Will you please obtain for us particulars of this and other valves of similar type made by the B.T.H. Co. as we require such a valve for the purpose of H.T. rectification for ball gap voltage measurement. EFC. {E. Fowler Clarke - Electrical Engineer} | ||