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 sheet for Weston Instrument No. 336.
| Identifier | ExFiles\Box 33\4\ Scan223 | |
| Date | 4th July 1925 | |
| X1782 4.7.25. X.1782. WESTON INSTRUMENT N-.336. Milliamperes for full scale deflection = 11.1 Millivolts for full scale deflection = 56.6 Resistance = 5.10 ohms. Resistance for .2 v range = 18.1 ohms. Resistance of wire per foot = 10.84 ohms. EFC. | ||