- Item type
- Object
- Provenance
- Presented by the Marconi Corporation in 2004.
- Primary inscriptions
- "MARCONI'S WIRELESS TELEGRAPH CO. LTD. / TYPE A.D.1 No. 253 / AIRCRAFT DEPARTMENT" printed on brass plaque on lower section of case.
- Object type
- Radio communication
- Dimensions
- Height: 250mm Width: 290mm Depth: 170mm Weight: 4.7kg
- Inventory No
- 81229
- Accession Number
- 2004-9/532
Description
Aircraft Wireless Telephone Transmitter Type AD1, in varnished linen-covered wooden case, with removable front panel. With transformers, aerial coil (including variometer and automatic send/receive switch), and two Marconi MT3E valves within interior. With two speakers and cast-brass? terminals upon upper exterior surface of case. With two-pin plugholes marked "SIDE TONE / PLUG" and "ARM: FLD:", battery terminals (marked "+H.T.", "-COM.", "+L.T.", "MIC"), and seven red wooden terminals on side exterior surfaces. Previously associated with Instruction Booklet For Aircraft Wireless Telephone Transmitter Type AD1 (Inv. Num. 50711).
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