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 order of a Zenith resistance unit for an ignition coil rig.
| Identifier | ExFiles\Box 167\2\ img135 | |
| Date | 5th July 1938 | |
| 6103 To EJJ. c. to RC{R. Childs}/GJ. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}9/JH.5.7.38. re Ignition rig apparatus. Will you please order for use on our ignition coil rig - 1 Zenith wirewound non-inductive resistance unit. Type Y.10. resistance value 1 megohm (centre tapped) This may be obtained from the Zenith electric Co.Ltd. London. O/N.815. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||