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).
Graph showing the volt-ampere characteristics of a Delco-Remy ballast resistance.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan127 | |
| Date | 4th November 1925 | |
| VOLT-AMPERE CHARACTERISTICS OF DELCO-REMY BALLAST RESISTANCE. AMPERES 2.0 1.5 1.0 .5 0 VOLTS 0 2 4 6 8 10 12 14 Y4784 H.E.W 4-11-25 | ||