Horizon BTSL100 100w Broadband Terminated Square Loop Antenna 160/10m (No Tuner Required)
HORIZON BTSL100 100w Broad Band Square Loop
Thank you for purchasing our Horizon BTSL100. The antenna is manufactured in Perth West Australia and is intended to offer simple and very efficient operation on all of the HF Amateur Radio bands including Austravel (VMD750), VKS737 HF Radio Network all without the need for a tuner. The SWR on this antenna is typically <1.5:1 across all the bands. This antenna does not require a tuner. See the VNA sweep above 1.5Mhz through to 29Mhz. At 82 metres in length it will be a big signal on the lower bands. Our BTSL100 has superior NVIS performance on the lower bands.
However, at lower radiation angles (below 45 degrees) on 7MHz to 30MHz, it breaks into directive beam lobes, mostly favouring the general direction of the resistor termination. This can be either an advantage or undesirable, depending on the user's application and location.
SPECIFICATION:
10/11/12/15/18/20/30/40/60/80/160 bands
100w SSB PEP 50w Digital Modes
82 metres physical length
Wire used: 1.6mm or 2mm G304 grade stainless steel
Balun winding: All copper
Some general considerations.
* Use good quality UV stabilised rope or cord to secure the antenna. It will last longer and therefore is cheaper in the long term
* Generally speaking the best VSWR is easier to achieve when the antenna is installed at a ¼ wave in metres above the ground in reference to the target frequency. For example the 40m band antenna should be 10 metres above the ground, a 20m band antenna 5 metres above the ground. For this reason a multi or broadband antenna will always be a compromise. With this rule in mind, if your favourite band is 40m then try to install the antenna to favour this band.
* Why do we use stainless steel? We get asked this question a lot. In truth, copper is very slightly more efficient but the trade-off is a shorter life span. Copper corrodes and stretches. Stainless does not. So while this antenna is a moderate investment in price the materials used mean it will serve you well into the future.
HORIZON BTSL100 100w Broad Band Square Loop
Thank you for purchasing our Horizon BTSL100. The antenna is manufactured in Perth West Australia and is intended to offer simple and very efficient operation on all of the HF Amateur Radio bands including Austravel (VMD750), VKS737 HF Radio Network all without the need for a tuner. The SWR on this antenna is typically <1.5:1 across all the bands. This antenna does not require a tuner. See the VNA sweep above 1.5Mhz through to 29Mhz. At 82 metres in length it will be a big signal on the lower bands. Our BTSL100 has superior NVIS performance on the lower bands.
However, at lower radiation angles (below 45 degrees) on 7MHz to 30MHz, it breaks into directive beam lobes, mostly favouring the general direction of the resistor termination. This can be either an advantage or undesirable, depending on the user's application and location.
SPECIFICATION:
10/11/12/15/18/20/30/40/60/80/160 bands
100w SSB PEP 50w Digital Modes
82 metres physical length
Wire used: 1.6mm or 2mm G304 grade stainless steel
Balun winding: All copper
Some general considerations.
* Use good quality UV stabilised rope or cord to secure the antenna. It will last longer and therefore is cheaper in the long term
* Generally speaking the best VSWR is easier to achieve when the antenna is installed at a ¼ wave in metres above the ground in reference to the target frequency. For example the 40m band antenna should be 10 metres above the ground, a 20m band antenna 5 metres above the ground. For this reason a multi or broadband antenna will always be a compromise. With this rule in mind, if your favourite band is 40m then try to install the antenna to favour this band.
* Why do we use stainless steel? We get asked this question a lot. In truth, copper is very slightly more efficient but the trade-off is a shorter life span. Copper corrodes and stretches. Stainless does not. So while this antenna is a moderate investment in price the materials used mean it will serve you well into the future.
HORIZON BTSL100 100w Broad Band Square Loop
Thank you for purchasing our Horizon BTSL100. The antenna is manufactured in Perth West Australia and is intended to offer simple and very efficient operation on all of the HF Amateur Radio bands including Austravel (VMD750), VKS737 HF Radio Network all without the need for a tuner. The SWR on this antenna is typically <1.5:1 across all the bands. This antenna does not require a tuner. See the VNA sweep above 1.5Mhz through to 29Mhz. At 82 metres in length it will be a big signal on the lower bands. Our BTSL100 has superior NVIS performance on the lower bands.
However, at lower radiation angles (below 45 degrees) on 7MHz to 30MHz, it breaks into directive beam lobes, mostly favouring the general direction of the resistor termination. This can be either an advantage or undesirable, depending on the user's application and location.
SPECIFICATION:
10/11/12/15/18/20/30/40/60/80/160 bands
100w SSB PEP 50w Digital Modes
82 metres physical length
Wire used: 1.6mm or 2mm G304 grade stainless steel
Balun winding: All copper
Some general considerations.
* Use good quality UV stabilised rope or cord to secure the antenna. It will last longer and therefore is cheaper in the long term
* Generally speaking the best VSWR is easier to achieve when the antenna is installed at a ¼ wave in metres above the ground in reference to the target frequency. For example the 40m band antenna should be 10 metres above the ground, a 20m band antenna 5 metres above the ground. For this reason a multi or broadband antenna will always be a compromise. With this rule in mind, if your favourite band is 40m then try to install the antenna to favour this band.
* Why do we use stainless steel? We get asked this question a lot. In truth, copper is very slightly more efficient but the trade-off is a shorter life span. Copper corrodes and stretches. Stainless does not. So while this antenna is a moderate investment in price the materials used mean it will serve you well into the future.