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• Catalogue level

  Piece

  Accessions administration: HW 41

  Accessions administration: HW 41

  Held by

  The National Archives, Kew

  Date

  2001 Jan 1 - 2003 Dec 31

  Reference

  PRO 57/15771

• Catalogue level

  Piece

  History of Wireless Experimental Centre (W.E.C) Delhi, June 1942-November 1945 (duplicate...

  History of Wireless Experimental Centre (W.E.C) Delhi, June 1942-November 1945 (duplicate of HW 41/120)

  Held by

  The National Archives, Kew

  Date

  1946 Mar 31

  Reference

  HW 41/121

• Catalogue level

  Piece

  HW 41: Government Code and Cypher School: Services Field Signals Intelligence Units;...

  HW 41: Government Code and Cypher School: Services Field Signals Intelligence Units; reports of Intercepted Signals and Histories of Field Signals Intelligence Units

  Held by

  The National Archives, Kew

  Date

  2001 Jan 1 - 2001 Dec 31

  Reference

  PRO 57/12580

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  FIELD SIGNALS INTELLIGENCE: Field signals intelligence HW 41; Middle East and North Africa HW 68.

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Piece

  RAF Middle East monthly reports of Italian air force W/T activity

  RAF Middle East monthly reports of Italian air force W/T activity

  Held by

  The National Archives, Kew

  Date

  1942 Aug 01-1943 Dec 31

  Reference

  HW 41/41

• Catalogue level

  Series

  Government Code and Cypher School: Services Field Signals Intelligence Units: Reports...

  This series consists of the reports to the Government Code and Cypher School by field signals intelligence units of the armed services based on decrypted intercepted enemy communications during and immediately preceding World War II. The series also …

  Held by

  The National Archives, Kew

  Date

  1914-1977

  Reference

  HW 41

• Catalogue level

  Item

  Stockholm; Information from SMID.

  Stockholm; Information from SMID.

  Held by

  The National Archives, Kew

  Date

  1942 Apr 12

  Reference

  HW 15/41/41

• Catalogue level

  Piece

  Reports of Japanese naval air decrypts

  Reports of Japanese naval air decrypts

  Held by

  The National Archives, Kew

  Date

  1945 May 19-1945 Jul 17

  Reference

  HW 27/41

• Catalogue level

  Piece

  Radio countermeasures (RCM)

  Radio countermeasures (RCM)

  Held by

  The National Archives, Kew

  Date

  1944 Jul 01 - 1944 Oct 31

  Reference

  HW 41/402

• Catalogue level

  Piece

  Notes on the organisation of signals intelligence in South East Asia

  Notes on the organisation of signals intelligence in South East Asia

  Held by

  The National Archives, Kew

  Date

  1944 Nov 16 - 1944 Dec 03

  Reference

  HW 41/428

• Catalogue level

  Piece

  Reception of German medium frequency transmissions in the Middle East

  Reception of German medium frequency transmissions in the Middle East

  Held by

  The National Archives, Kew

  Date

  1941 May 01 - 1945 Oct 30

  Reference

  HW 41/427

• Catalogue level

  Piece

  Historical review of Y work on German naval wireless telegraphy (W/T) communications

  Historical review of Y work on German naval wireless telegraphy (W/T) communications

  Held by

  The National Archives, Kew

  Date

  1914 Jan 01 - 1945 Jul 31

  Reference

  HW 41/405

• Catalogue level

  Piece

  Manual of Military Intelligence in the Field: Pamphlet No 5, 1939. Manual on conduct...

  Manual of Military Intelligence in the Field: Pamphlet No 5, 1939. Manual on conduct of Sigint in the field

  Held by

  The National Archives, Kew

  Date

  1939 Jan 01 - 1939 Dec 31

  Reference

  HW 50/41

• Catalogue level

  Piece

  Memoranda and minutes of the Y Board and Y Committee concerned with the expansion...

  Memoranda and minutes of the Y Board and Y Committee concerned with the expansion of the Y Services

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1943 Sep 21

  Reference

  HW 41/381

• Catalogue level

  Piece

  Technical aspects of DF operations

  Technical aspects of DF operations

  Held by

  The National Archives, Kew

  Date

  1944 Nov 07 - 1945 Sep 26

  Reference

  HW 41/394

• Catalogue level

  Piece

  Western Mediterranean signals intelligence reports

  Western Mediterranean signals intelligence reports

  Held by

  The National Archives, Kew

  Date

  1944 Apr 01 - 1944 Dec 31

  Reference

  HW 41/372

• Catalogue level

  Piece

  Report describing the frequency spectrum between 20 and 3000 megacycles for the use...

  Report describing the frequency spectrum between 20 and 3000 megacycles for the use of non-morse operators

  Held by

  The National Archives, Kew

  Date

  1945 Mar 01-1945 Mar 01

  Reference

  HW 41/132

• Catalogue level

  Piece

  Reports of activities of Intelligence units in North Africa

  Reports of activities of Intelligence units in North Africa

  Held by

  The National Archives, Kew

  Date

  1941 Oct 01 - 1942 Jan 31

  Reference

  HW 41/430

• Catalogue level

  Piece

  Information on German, Italian and French communications passed to naval intercept...

  Information on German, Italian and French communications passed to naval intercept stations

  Held by

  The National Archives, Kew

  Date

  1938 Apr 15-1940 Feb 12

  Reference

  HW 41/136

• Catalogue level

  Piece

  Organisation of signals intelligence in the Far East

  Organisation of signals intelligence in the Far East

  Held by

  The National Archives, Kew

  Date

  1944 Oct 24 - 1945 May 17

  Reference

  HW 41/418