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).
Leaflet for an Osram Extra High Tension Rectifying Valve, Type E.H.T.2.
| Identifier | ExFiles\Box 41\2\ Scan080 | |
| Date | 1st April 1928 | |
| Leaflet O-V.{VIENNA} 98 (April, 1928.) Osram Valves Extra High Tension Rectifying Valve. TYPE E.H.T.2. Type E.H.T.2 is a 2-electrode thermionic valve, specially designed to withstand high voltages. The valve will withstand a maximum peak reverse pressure of 40,000 volts, or a capacity load of about 20,000 volts. The maximum anode current that may be taken from the filament is 10 milliamps R.M.S., and a protective resistance should be included in series with the anode circuit. On cable testing the protective resistance should be about 1 megohm. It is recommended that the high voltage be applied to the anode, in easy stages. The E.H.T. Rectifier No. 2 is designed primarily for insulation and cable testing purposes, but may be employed to replace mechanical rectifiers in cases when the rectification of high voltages is desired. Its absence of moving parts; small bulk; ready replaceability and low maintenance costs are some of its advantages, which recommend it for this purpose. Approx. Dimensions Overall length (uncapped) - 260 m/m.{Mr Moon / Mr Moore} Maximum diameter of bulb - 100 m/m.{Mr Moon / Mr Moore} Price each £6 : 6 : 0 The General Electric Company, Limited REG. TRADE MARK Telephone : Regent 7050 (61 lines). Telegrams : 'Electricity, Westcent, London.' Head Office : Magnet House, Kingsway, London, W.C.2. Branches throughout the United Kingdom and in all principal markets of the World REG. TRADE MARK O.V. 4,680. | ||