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Divulgação
Spiderbeam
TX RX Fórum :: TX&RX Fórum :: HF :: Antenas - HF
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Spiderbeam
por ALF007 Qui 7 Ago 2014 - 3:31
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Building your own antenna is a lot of fun!
Especially after it is finished – get on the air with it and realize how well your homebrew spiderbeam really works! Assembly is straightforward and easy. Nearly no tuning procedure is necessary, making it an ideal newcomer’s project.
Construction Guide – Version 2.20
[Tens de ter uma conta e sessão iniciada para poderes visualizar esta imagem]
The spider beam is a full size lightweight tribander yagi for 20-15-10m, made from fiberglass and wire. It has been specially developed as a highly efficient antenna for portable use – a DXpeditioner’s dream.
Further development yielded a complete 5-band-beam (20-17-15-12-10m), a WARC version (30-17-12m), and several other configurations. Recently, monoband versions and a specially reinforced heavy duty antenna line (optimized for permanent installation at home) have been added.
Apart from a good highband antenna, a competitive portable contest station must have a lightweight & efficient antenna for the low bands as well. For this purpose we have designed our professional telescopic fiberglass poles with a total height of 12m (40ft) and 18m (60ft) (NEW!). These strong poles are very well suited for carrying lowband wire GP or inverted L antennas, or any other temporary wires, like quad or delta loops and dipoles for all bands.
The secret behind the success of our portable spiderbeam yagi is its simplicity, ruggedness and a true “no compromise” design: several fullsize monoband beams are interlaced on one boom with negligible interaction. While the antenna is as light as a mini beam, it maintains the gain and F/B ratio of a typical full size tribander. The whole antenna weight is only 6-7kg (14 lbs), making it ideally suited for portable use. It can be carried and installed easily by a single person. A small push-up mast and a TV rotator is totally sufficient, saving even more weight on the total setup. The transportation length is only 1.20m (4ft).
After completion of the design phase and successful trial runs in 2001 and 2002 CQWW contests, the Spiderbeam antenna plans were released to the public. A very detailed construction guide (classic Heathkit-style step-by-step instructions) is available as a PDF document. You are most welcome to download our free construction guide and build your own spider beam from scratch. Several helpful OMs have kindly translated this manual to their mother tongue, making it available in several different languages. This incredible worldwide response and cooperation turned the construction guide turned into a truly international open-source project, and Spiderbeam into a worldwide known trademark for affordable, high quality fiberglass antennas of all kinds.
- PDF
Fonte
Building your own antenna is a lot of fun!
Especially after it is finished – get on the air with it and realize how well your homebrew spiderbeam really works! Assembly is straightforward and easy. Nearly no tuning procedure is necessary, making it an ideal newcomer’s project.
Construction Guide – Version 2.20
[Tens de ter uma conta e sessão iniciada para poderes visualizar esta imagem]
The spider beam is a full size lightweight tribander yagi for 20-15-10m, made from fiberglass and wire. It has been specially developed as a highly efficient antenna for portable use – a DXpeditioner’s dream.
Further development yielded a complete 5-band-beam (20-17-15-12-10m), a WARC version (30-17-12m), and several other configurations. Recently, monoband versions and a specially reinforced heavy duty antenna line (optimized for permanent installation at home) have been added.
Apart from a good highband antenna, a competitive portable contest station must have a lightweight & efficient antenna for the low bands as well. For this purpose we have designed our professional telescopic fiberglass poles with a total height of 12m (40ft) and 18m (60ft) (NEW!). These strong poles are very well suited for carrying lowband wire GP or inverted L antennas, or any other temporary wires, like quad or delta loops and dipoles for all bands.
The secret behind the success of our portable spiderbeam yagi is its simplicity, ruggedness and a true “no compromise” design: several fullsize monoband beams are interlaced on one boom with negligible interaction. While the antenna is as light as a mini beam, it maintains the gain and F/B ratio of a typical full size tribander. The whole antenna weight is only 6-7kg (14 lbs), making it ideally suited for portable use. It can be carried and installed easily by a single person. A small push-up mast and a TV rotator is totally sufficient, saving even more weight on the total setup. The transportation length is only 1.20m (4ft).
After completion of the design phase and successful trial runs in 2001 and 2002 CQWW contests, the Spiderbeam antenna plans were released to the public. A very detailed construction guide (classic Heathkit-style step-by-step instructions) is available as a PDF document. You are most welcome to download our free construction guide and build your own spider beam from scratch. Several helpful OMs have kindly translated this manual to their mother tongue, making it available in several different languages. This incredible worldwide response and cooperation turned the construction guide turned into a truly international open-source project, and Spiderbeam into a worldwide known trademark for affordable, high quality fiberglass antennas of all kinds.
Fonte
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