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).
Specifications for a standard finer primary coil wound in the production department.
| Identifier | ExFiles\Box 69\1\ scan0082 | |
| Date | 12th May 1928 | |
| X8710 12.5.28. STANDARD FINER PRIMARY COIL WOUND IN PRODUCTION DEPT. UNDER EFC'S SUPERVISION. Primary - resistance 2.26 ohms at 16°C. impedance (50~) 5.48 ohms. reactance 5.01 ohms. inductance .0164 henry. Secondary(unbaked) - resistance 4620 ohms at 16°C. impedance (50 ) 14540 ohms. reactance 13800 ohms. inductance 43.8 henries. --- EFC. | ||