Amplifier And Detector Type 55A With Headphones, by Marconi Company, London, c. 1920 | |||||||||||
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| Inventory Number: | 18067 | ||||||||||
| Object Type: | | ||||||||||
| Place Created: | London England United Kingdom Europe |
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| Accession Number: | 2004-9/81 | ||||||||||
| Brief Description: | Amplifier and Detector Type 55A With Headphones, with seven 'Marconi' V24 valves, two sliding potentiometers, numerous terminals, dovetailed teak frame and japanned steel case. Thirteen brass terminals marked "6 VOLTS + -", "H.T. VOLTS + -", "120 Ohms TELEPHONES", "E", "F", and "G". With earphones. This amplifier and detector formed part of a Marconi No.6 direction finding station. It was used along with a radiogoniometer, tuning condenser, transformer, battery and wavemeter. | ||||||||||
| Primary Inscriptions: | "M.W.T. CO. LTD. LONDON / AMPLIFIER NO 181868 / TYPE NO 55 A / NO OF VALVES 7 / WAVE RANGE 600 - 5000m / H.T. VOLTS 50" on plastic plaque on interior of teak frame. | ||||||||||
| Provenance: | Presented by the Marconi Corporation. | ||||||||||
| Collection Group: | Marconi Collection | ||||||||||
| Material(s): |
Glass teak steel brass. | ||||||||||
| Dimensions: |
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There are no associated narratives. | |||||||||||
Permalink: http://www.mhs.ox.ac.uk/object/inv/18067