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Marconiphone Type V2A, by Marconi Company, England, c. 1923
Inventory Number: 50144
Number of documents: 3
Document Type: Miscellaneous Note
Document Heading: Inscription
Text:
"G. Marconi [Signature Logo]" transfer upon exterior surface of case lid. "MARCONIPHONE / WAVE-LENGTH / 900-1100 / METRES / A.S. NO- 160 D." printed on celluloid circular plaque upon side of rear wavelength plate. "MARCONI'S WIRELESS / TELEGRAPH CO LTD- / NO C-E 9721 LONDON" printed on brass plaque upon interior surface. "MARCONIPHONE / TYPE A / REGENERATOR UNIT / FOR 2100 - 3200 / METRES" etched on side of generator unit'>regenerator unit.
Document Type: Miscellaneous Note
Document Heading: Object Dating
Text:
This item can be accurately dated to 1922-1923 as BBC logo ("TYPE APPROVED BY POSTMASTER GENERAL") was used from 1st November 1922 until September 1924. Instrument is also signed by Marconiphone Department of the Marconi Company which was founded in 1922 and became a separate company in December 1923. Therefore, it is highly likely that instrument was made between November 1922 and Decemeber 1923.
Document Type: Miscellaneous Note
Document Heading: Manufacturer Details
Text:
After World War I, the Marconi Company began producing non-industrial receivers, principally for the amateur market, at the Soho premises of The Marconi Scientific Instrument Company. In 1922, the Marconi Company formed the 'Marconiphone' department, to manufacture and sell domestic receiving equipment. This equipment complied with Post Office specifications and tests, and was therefore awarded the BBC authorisation stamp; initially sets were made at the Chelmsford Works. In December 1923, the 'Marconiphone' department was formed as a subsidiary of the Marconi Company. Some Marconiphone Company sets were made at the Sterling Telephone Company (STC) Works at Dagenham. However, design and research of these domestic receivers still continued at Chelmsford.
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