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).
Product specification sheet for a Wave Analyser, Type TF.455, from Marconi-Ekco Instruments Ltd.
| Identifier | ExFiles\Box 138\1\ scan0304 | |
| Date | 1st June 1938 | |
| COM. D.6. WAVE ANALYSER. TYPE TF.{T. Fisher}455 An instrument for the direct measurement of the components of complex voltage waves having an amplitude of 0.2 mV. to 200 volts in the frequency range 20 to 15,000 c.p.s. MARCONI-EKCO INSTRUMENTS LTD., ELECTRA HOUSE, VICTORIA EMBANKMENT, LONDON. W.C.2 JUNE 1938. | ||