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).
Circuit diagram for a high-voltage test apparatus using a valve rectifier.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan162 | |
| Date | 16th September 1926 guessed | |
| ~ SUPPLY 200 VOLTS or 100 VOLTS Primary H.T. Secondary ± 10000 ± 5000 ± 2500 0 ± 2500 ± 5000 ± 10000 ±2400 alt.volts max. 3400. Valve rectifier. Milliammeter. Plate under test. | ||