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).
Page two of a letter from A.C. Cossor Ltd. regarding the use of Oscillograph amplifiers.
| Identifier | ExFiles\Box 167\2\ img248 | |
| Date | 12th February 1940 | |
| Messrs. Rolls-Royce, Ltd. -2- 12th February, 1940. described on page 25, section 4.2, of the Model 3339 Instruction Manual, a copy of which was left with you. As you will be using the Oscillograph amplifiers as driver stages, the above investigations would obviously be restricted to the frequency range possible with these amplifiers, that is, frequencies above 10 to 20 c.p.s. Awaiting to hear from you in due course, we remain, Yours faithfully, For and on behalf of A.C. COSSOR, LTD. (E.{Mr Elliott - Chief Engineer} Cattanes) Manager, Instrument Dept. | ||