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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Another Functional 625 Aerial
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<blockquote data-quote="Channel Hopper" data-source="post: 1110147" data-attributes="member: 175144"><p><em>The "Skeleton Slot" antenna was conceived and developed by Bill Sykes,</em></p><p><em>G2HCG, in the late 1940s. He obtained a patent and the design became the</em></p><p><em>basis of his company, Jaybeam Limited. The original Skeleton Slot was a 2m</em></p><p><em>antenna. It was basically a vertical Loop Antenna that was fed, with a</em></p><p><em>balanced feed, on opposite sides; hence the polarisation was horizontal.</em></p><p><em>The loop was not circular, nor was it square. It was "stretched" vertically</em></p><p><em>into a rectangle. He then added a horizontal Director and a Reflector</em></p><p><em>element in the plane of the top and bottom sections; hence he had a pair of</em></p><p><em>3-element beams. But the driven elements were not "full length" dipoles.</em></p><p><em>They were just the centre section of equivalent dipoles (where the current</em></p><p><em>is maximum, which is what you want). Later 2 more Directors were added at</em></p><p><em>each level making it a pair of 5-element Yagis stacked one above the other</em></p><p><em>and having the common slot driven element. The D5-2M, as it was known, led</em></p><p><em>to the D8-2M by adding 3 more directors to each Yagi. This was a very</em></p><p><em>popular antenna in England and in Europe. The D8-2M was also imported and</em></p><p><em>sold for several years in America. </em></p><p></p><p>and </p><p></p><p>The 70cm version was called the '8 over 8'</p><p></p><p></p><p><a href="http://nm9j.com/pcara/docs/pcud0716.pdf" target="_blank">http://nm9j.com/pcara/docs/pcud0716.pdf</a> ( page 13 )</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 1110147, member: 175144"] [I]The "Skeleton Slot" antenna was conceived and developed by Bill Sykes, G2HCG, in the late 1940s. He obtained a patent and the design became the basis of his company, Jaybeam Limited. The original Skeleton Slot was a 2m antenna. It was basically a vertical Loop Antenna that was fed, with a balanced feed, on opposite sides; hence the polarisation was horizontal. The loop was not circular, nor was it square. It was "stretched" vertically into a rectangle. He then added a horizontal Director and a Reflector element in the plane of the top and bottom sections; hence he had a pair of 3-element beams. But the driven elements were not "full length" dipoles. They were just the centre section of equivalent dipoles (where the current is maximum, which is what you want). Later 2 more Directors were added at each level making it a pair of 5-element Yagis stacked one above the other and having the common slot driven element. The D5-2M, as it was known, led to the D8-2M by adding 3 more directors to each Yagi. This was a very popular antenna in England and in Europe. The D8-2M was also imported and sold for several years in America. [/I] and The 70cm version was called the '8 over 8' [URL]http://nm9j.com/pcara/docs/pcud0716.pdf[/URL] ( page 13 ) [/QUOTE]
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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Another Functional 625 Aerial
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