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).
Instructions on the behaviour of spark gaps, high-frequency oscillations, and voltage.
| Identifier | WestWitteringFiles\I\October1922\ Scan75 | |
| Date | 6th November 1918 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. 7 19 the wider the gap, the brighter will be the glow so long as a spark passes. But if the spark fails for any reason, whether by leakage or too wide a gap, the high-frequency oscillation is absent and the tube glows much less brightly. Similarly as there is a small voltage at a high frequency on the earthed side of the spark-gaps, a continuous glow of medium intensity is obtained by connecting the tester to it. If a glass plate condenser be connected across one spark gap the frequency of the applied voltage is not increased and no brighter glow is obtained. But the high-frequency voltage of the earthed side (Cont'd) Signed This Sheet must be filed on completion of the work. | ||