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'Marconi' Universal Aircraft Telegraph Transmitter/Receiver Type AD6D, by Marconi Company, London, c. 1928
Inventory Number: 94461
Number of documents: 2
Document Type: Miscellaneous Note
Document Heading: Inscription
Text:
"'MARCONI' RECEIVER / TYPE A.D.6.D. P.S. NO 1921 A. / INST NO 325828 MARCONI'S WIRELESS TELEGRAPH CO. LTD. LONDON" printed on metal plaque upon vertical panel of receiver. "'MARCONI' A.T.I. / INST. NO. 325827 P.S. NO 2535 A/ TYPE A.D.6.D. MARCONI'S WIRELESS TELEGRAPH CO. LTD. LONDON" printed on metal plaque upon vertical panel of transmitter.
Document Type: Miscellaneous Note
Document Heading: Historical Background
Text:
This set, first introduced in the mid-1920s, was the first set to be used with a constant-speed wind generator. This example is probably from Captain Courtney's 1928 transatlantic attempt (see footnote to MSS 860); if so, according to information in the Courtney file (MSS 359) it is modified to telegraphic use only, the telephone elements being removed.
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