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).
Specification for an intermediate value ballast resistance wire.
| Identifier | ExFiles\Box 168a\5\ img026 | |
| Date | 16th November 1928 | |
| X7720 16.11.28: INTERMEDIATE VALUE BALLAST RESISTANCE Specification of ballast resistance wire given to EY/RD. for intermediate value ballast resistance. 33 1/4 inches of No.32 SWG. pure nickel wire. L.O.P. D.70843. EFC. | ||