Record revealed
Copy of Henry VIII's diplomatic assurances to João III of Portugal
Recently rediscovered, this letter offers new archival evidence into Britain and Portugal's shared history.
Piece
Physical principles in frequency modulation
Catalogue reference: AVIA 26/72
What’s it about?
This record is about the Physical principles in frequency modulation dating from 1941 in the series Ministry of Aviation, predecessors and successors: Royal Radar Establishment (later.... It is held at The National Archives, Kew.
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Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
- AVIA 26/72
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Date (When the record was created)
- 1941
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Description (What the record is about)
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Physical principles in frequency modulation
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Held by (Who holds the record)
- The National Archives, Kew
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Former department reference (Former identifier given by the originating creator)
- T 1070
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Legal status (A note as to whether the record being described is a Public Record or not)
- Public Record(s)
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
- Open Document, Open Description
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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- Topics
- Research
- Communications
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C2381664/
Series information
AVIA 26
Ministry of Aviation, predecessors and successors: Royal Radar Establishment (later...
See the series level description for more information about this record.
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
96,520 records
Within the department: AVIA
Records created or inherited by the Ministry of Aviation and successors, the Air...
2,327 records
Within the series: AVIA 26
Ministry of Aviation, predecessors and successors: Royal Radar Establishment (later...
You are currently looking at the piece: AVIA 26/72
Physical principles in frequency modulation
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