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).
Revision notice for the resistance value related to reduced charge switching.
| Identifier | ExFiles\Box 163\6\ img045 | |
| Date | 23th May 1930 | |
| X6016 23.5.30. X.6016. REDUCED CHARGE SWITCHING. The value of the resistance in connection with the above has been revised and is now 2'1" of No.26 SWG. bare Eureka wire. By/RD. has been duly informed. EFC. | ||