RAF Ibsley, Hampshire HF/DF Site

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RAF Ibsley, Hampshire HF/DF Site

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GPO general Post Office, a great loss when nationalised. The GPO were world leaders in communications technology of the time, they started British radar, computing, code breaking and loads of other modern inventions. Their technicians were true individualists and worked in dusty small offices, labs. all through the 1930's and as war started to look imminent, a lot of their ideas were used. So when out on a walk in the middle of nowhere and you find a stone with GPO. You can bet it could be a telephone line laid to a secret instillation like this Huf /Duf building.

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1941 Post Office van in Devon.

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Morris Post Office van.

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The Post Office Research Station Dollis Hill, London.

RAF Ibsley, Hampshire HF/DF Site

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RAF Ibsley, Hampshire HF/DF Site

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RAF Ibsley, Hampshire HF/DF Site

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1946

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RAF Ibsley, Hampshire HF/DF Site

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A 1946 air photo of the HF/DF site.

RAF Ibsley, Hampshire HF/DF Site

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Wiki-maps

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RAF Ibsley, Hampshire HF/DF Site

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There are two routes from Ibsley to the site and where you can park.

RAF Ibsley, Hampshire HF/DF Site

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Plan

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RAF Ibsley, Hampshire HF/DF Site

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This is a plan of the HF/DF site.

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Tower.

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How the hut may have looked.

RAF Ibsley, Hampshire HF/DF Site

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26 August 2012

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RAF Ibsley, Hampshire HF/DF Site

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This is the southern route from Moyles Court, past the Battle HQ and out into the forest.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Taking measurements, the base of the tower looking due east.

RAF Ibsley, Hampshire HF/DF Site

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RAF Ibsley, Hampshire HF/DF Site

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View of the towers protective blast wall and the foundations to the wooden tower.

RAF Ibsley, Hampshire HF/DF Site

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Matthew Drew

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RAF Ibsley, Hampshire HF/DF Site

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The HF/DF tower was made of wood, protected by the brick blast wall and covered probably in black Tar paint.
The octagonal blast wall on Ibsley Common surrounds a similarly shaped concrete foundation inside. They are the remains of a once top secret wartime direction finding station commonly referred to as HF/DF or "Huff Duff". The equipment and its operators were accommodated within the confines of an octagonal 3 storey wooden antenna tower bolted to a concrete plinth. The antenna tower was 30 feet high and was constructed of wood to minimise both electrical and magnetic interference. It was topped by a fixed small aerial array of four vertical dipoles arranged in a square configuration. There is another building 100 yards away crew accommodation. Adjacent to this building is an air raid shelter. 

The key feature and main advantage of Huff Duff was its use of a cathode ray tube display and fixed aerial that would instantaneously reveal the direction of the transmission without the need to rotate the aerial. These small radio direction finding stations were the last link in the RAF fighter control system. Two or more stations 30 miles apart could by a system of triangulation, determine the direction and position of a squadron's lead aircraft from its r/t transmission, information that was then passed to the sector control. Once the coordinates were known, the squadron could then be guided to intercept the enemy aircraft that had been located by radar and observer posts. Each station was also equipped with a "Homer", a radio transmitter beacon to help Allied aircraft navigate their way home in bad weather. geograph

RAF Ibsley, Hampshire HF/DF Site

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(Lt) E J Russell Admiralty official section IWM 24 October 1944

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RAF Ibsley, Hampshire HF/DF Site

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Royal Navy W/T Station at Southwold designed and built pre war in anticipation of hostilities. By 1944 technology had advanced to a great extent that made these redundant and were all pulled down.

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RAF Ibsley, Hampshire HF/DF Site

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(Lt) E J Russell Admiralty official section IWM 24 October 1944

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RAF Ibsley, Hampshire HF/DF Site

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An aerial in the roof section that pivoted on a central support and turned by an operative sitting at a desk. He or she would turn the aerial to pick up the strongest signal from an aeroplanes radio transition. When the strongest signal is found a bearing is taken and matched with another station and the two matched together gives the exact position of the aeroplane.

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RAF Ibsley, Hampshire HF/DF Site

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Plan

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RAF Ibsley, Hampshire HF/DF Site

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An aerial in the roof section that pivoted on a central support and turned by an operative sitting at a desk. He or she would turn the aerial to pick up the strongest signal from an aeroplanes radio transition. When the strongest signal is found a bearing is taken and matched with another station and the two matched together gives the exact position of the aeroplane.

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RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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More measuring going on.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Pre war local brick wall, very well made and nicely finished off capping stones.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Entrance.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The entrance an a wooden door would have closed off the entrance.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The inside with the concrete foundations still in place.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Foundations of the wooden tower still has a bolt with its nuts on the threads.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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More bolts.

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Bolt.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The corner of the brick wall has been chamfered off to fit in the tower.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The boundary stones and the straight line part of the two squares laid out around the structure.

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The tower and its squares.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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More boundary Stones.

RAF Ibsley, Hampshire HF/DF Site

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Plan.

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RAF Ibsley, Hampshire HF/DF Site

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Now moving across to the Hut and the air-raid shelter.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The Hut.

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How the hut may have looked.

RAF Ibsley, Hampshire HF/DF Site

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(Lt) E J Russell Admiralty official section IWM 24 October 1944

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RAF Ibsley, Hampshire HF/DF Site

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Royal Navy W/T Station at Southwold is very like the hut here would have looked inside.

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Spitfire radio.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The Hut.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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The Hut.

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How it may have looked.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Air-Raid Shelter.

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Air-raid warning.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Air-Raid Shelter entrance.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Air-Raid Shelter the quite thick reinforced roof.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Air-Raid Shelter.
Information taken from the interpretation board now on the air-raid shelter entrance.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Air-Raid Shelter inside, be very careful entering as at some times of the year there are Adders nesting in here. We entered mid summer and there were around ten inside.

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How you would see an Adder in the New Forest.

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Vipera berus, the common European Adder.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Aerial base..

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Triangulation point.

RAF Ibsley, Hampshire HF/DF Site

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18 November 2012

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RAF Ibsley, Hampshire HF/DF Site

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Triangulation point.

RAF Ibsley, Hampshire HF/DF Site

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1946

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RAF Ibsley, Hampshire HF/DF Site

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The HF/DF site & Hut.

RAF Ibsley, Hampshire HF/DF Site

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04 June 2006

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RAF Ibsley, Hampshire HF/DF Site

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End of a lovely day in 2006 at Ibsley.

New Forest 'Walk to the Huff Duff' trail.