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).
Letter to Messrs, Johnson & Phillips Ltd. regarding an ionization test and spark gap calibration.
| Identifier | ExFiles\Box 167\3\ img107 | |
| Date | 12th May 1938 | |
| 6110 EXPERIMENTAL DEPT. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}9/JH. 12th May. 1938. Messrs, Johnson & Phillips Ltd., Charlton, LONDON. S.E.7. Dear Sirs, With reference to your letter of the 4th. re our ionization test, the gap is continuously in circuit and should be calibrated to spark over at 10,000 volts. We suggest that you send to us your spark gap and we will calibrate same on our high tension voltmeter. If any further difficulties arise we shall be pleased to demonstrate our test to your representative. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||