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).
Trial resistances for half charge, showing an original proposal and subsequent standardized values.
| Identifier | ExFiles\Box 163\6\ img028 | |
| Date | 14th April 1930 | |
| x.6016. 14.4.30. X. 6016. TRIAL RESISTANCES FOR HALF CHARGE. Originally proposed 3'5" of 26 S.W.G. Eureka 3.0 ohms. 40" standowdised. (1) 2'9" of " " 2.4 " 32" (2) 2'1" of " " } Taken 1.8 " 24" (3) 1'5" of " " } with 23-EX.1.2 " 16" 7" 45" 6" EFC. | ||