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).
Log sheet detailing test results for experimental condensers.
| Identifier | ExFiles\Box 52\3\ Scan066 | |
| Date | 27th July 1922 | |
| XW430 E.F.C. Typed 27.7.22. X.4430 - EXPERIMENTAL CONDENSERS No. | Material. | Date. | Particulars. 1 | Tin foil .0005" x 2.125" wide. Oil Silk .002" x 2.350" from The Ioco Company. | 26.1.22. | Rolled. Recd. from Prod. Dept. | | 6.II.22. | Tested rig. O.K. No make spark. Cap.100 V - .258. | | 6.II.22. | On 200 a.c. 12 mins. Cold. Hold charge. No. D.C. | | 14.II.22. | Failed on 400 a.c. after ½ min 2 | Tin foil .0005" x 2.125" wide. Single interleaved silk and tin foil. | 26.1.22. | Rolled. Recd. from Prod. Dept. | | 6.II.22. | Tested rig O.K. No make sparks. Cap 100 V - .295. | | 6.II.22. | On 200 a.c. 12 mins. Cold. Holds charge. No D.C. | | 7.II.22. | Failed on about 250 a.c. Handed Mr.Brock for rewinding. 3. | " | 8.2.22. | Recd. Prod. Dept. Leak 30 Kw Heats on 200. a.c. Cap on 100 V = .30 mf. 3 & 4. | " | 8.2.22. | Both leak heavily on warming. 3 | " | 8.2.22. | Failed on 400 a.c. ( or less). 14.3.22. 4 | " | 8.2.22. | Recd. Prod. Dept. Leak 25 Kw. Heats on 200. a.c. | | 8.2.22. | Capacity on 100 V = .25 mf. | | 14.2.22. | Failed on 400 ac. (or less). 5 | Tin foil .0005" x 2.125" wide. Oil silk .002" x 2.350" from The Ioco Company. | 10.2.22. | Recd. Leak v small. .1Ω Cool on a.c. Holds charge. Cap. on 100 V = .286 mf. 6 | Tin foil .0005" x 2.125" wide. Std. twin paper .0015" x 2.325 from Atwater. | 18.2.22. | Recd. Mr. Brock. Stood 500 volts a.c. Cap. on 100 & 200 V .270 mf. (cold). | | 20.2.22. | O.K. on rig. Cool on a.c. (¼ hr) Make spark all speeds. Holds charge momentarily. | | 20.4.22. | Handed Mr.Brock for casing. | | 21.2.22. | Recd back from Mr.Brock for No.7. | ||