What Our Customers Say
SWR ok from 26.500 MHz to 30.00 MHz, center band as indicated 27.500 MHz.
Excellent yield and reception. Thanks so much.
Stefano 1DL109 - N. Italy
__________________________
Giuliano 1AT468 - Italy
Giuliano 1AT468 - Italy
__________________________
look your 2 element delta loop installed two months ago on 2” diameter pole without any issues. We had strong winds in the past few weeks but the antenna responded in a very excellent way. I have also a vertical antenna and could make a lot of comparisons between the two antennas. The delta loop is much more silent than the vertical either in good and bad weather conditions, so I could receive a lot of weak signals wich on vertical were completely absent. Forward signals on the delta loop are all from a minimum of 4 S-points higher than the vertical. Thank you!
Best regards,
G.F.
eBay Feedbacks
The SmarTech 27DL2 is the Delta Loop that, above all, responds to the needs of those who are looking for a small, lightweight, and high-performing system.
It is a low-noise antenna since it is free from electrostatic noise. Thanks to its excellent signal-to-noise ratio, the 27DL2 is perfectly efficient, even when other types of antennas are practically unusable. Additionally, the antenna can be mounted on a lightweight support such as a TV pole or small rotor, and it reaches its characteristic performance even at low heights above the soil.
The radiation patterns clearly demonstrate that the 27DL2 is suitable for both long-distance DX and medium/short-range contests. For more details, please refer to the antenna patterns.
This antenna boasts a flat VSWR curve, covering the whole 27 MHz band with less than VSWR 1.5:1
| ELECTRICAL SPECIFICATIONS | |
| Gain | 12.57dBi @20m (65.6ft) |
| Front/Back Ratio | 26.58dB @20m (65.6ft) |
| Impedance | 50 ohm |
| Power rating | 5.0 kW |
| Matching Method | Gamma Match |
| 3 dB Horizontal Beamwidth | 76.2° @20m (65.6ft) |
| PHYSYCAL AND MECHANICAL SPECIFICATIONS | |
| Weight | 11kg (24.2lb) |
| Boom length | 2m (6.56ft) |
| Longest element | 3.70m (12ft) |
| Rotation radius | 2.07m (6.8ft) |
| Projected area [F=Flat - C=Cylindrical] | F = 0.31 m²(3.4 ft²) - C= 0.06m² (0.6 ft²) |
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The SmarTech Delta Loop antennas are designed to achieve the best configuration between maximum forward gain, improved Front-to-Back ratio, better Front-to-Side ratio, and greater radiation pattern cleanness. This is achievable because the calculation combinations are not limited to only 50 ohm (or 100 ohm) configurations, unlike direct feed antennas with coaxial cable. Imposing specific design impedances can significantly limit the range of useful solutions, resulting in greater performance compromises.
The SmarTech Delta Loop antennas are designed with the most advanced calculation models that allow for optimal configuration without impedance constraints. The impedance matching is performed by a specific and high-quality gamma match system, ensuring the best signal transfer and extremely high efficiency levels of the whole antenna system.
The main structure of the antenna is made of an aluminum alloy EN AW-6060/82 UNI9006/1 (Anticorodal 60/100), which provides greater durability against aggressive atmospheric agents (ice, water, UV rays, fine dust, acid rain), and better resistance to the mechanical stresses of wind.
SmarTech antennas are also supplied, depending on the model and specific mechanical requirements, with parts in Aisi 304 stainless steel (Austenitic Stainless Steel UNI/EN 10088) and parts in steel compliant with the resistance classes designated by the EN ISO 898-1 standard: 2013.
The horizontal wire is one of the most important components of the antenna, as it carries the highest current, and the RF radiation is maximum. Therefore, the quality of the material determines the system efficiency to a great extent.
SMARTECH has focused its utmost care and efforts on producing a specific, special wire consisting of 99.99% pure copper with an antioxidation coating and insulated with a special polymer. The wire is also used in military and aerospace applications due to its excellent dielectric properties (better insulation than glass), abrasion and tear resistance, UV resistance, and chemical solvent attack resistance. It has an IDT of 8 kV and can operate at temperatures ranging from -65°C to +150°C.
A high-efficiency Gamma Match is used to adapt the 27DL2 (relative dielectric constant εr=2.0 @1 MHz - with better dielectric properties than fiberglass and polyethylene, and a dielectric strength of 600kV) to 50 ohms. The power rating can go up to 5 kW (optional).
The antenna is designed to achieve maximum electrical efficiency and the best mechanical strength and durability, thanks to the quality of the materials used. It is also suitable for installation in particularly aggressive environments, such as high-altitude mountainous areas or coastal areas with a highly corrosive atmosphere.
SmarTech antennas are made using materials and technological solutions that minimize parasitic resistances (which produce unwanted RF dissipations) along the entire radio frequency signal path.
The costs include proper packaging, completion of customs documentation, and 24/7 shipping tracking. All products are shipped using the most important and reliable international couriers.
What Our Customers Say
SWR ok from 26.500 MHz to 30.00 MHz, center band as indicated 27.500 MHz.
Excellent yield and reception. Thanks so much.
Stefano 1DL109 - N. Italy
__________________________
Giuliano 1AT468 - Italy
Giuliano 1AT468 - Italy
__________________________
look your 2 element delta loop installed two months ago on 2” diameter pole without any issues. We had strong winds in the past few weeks but the antenna responded in a very excellent way. I have also a vertical antenna and could make a lot of comparisons between the two antennas. The delta loop is much more silent than the vertical either in good and bad weather conditions, so I could receive a lot of weak signals wich on vertical were completely absent. Forward signals on the delta loop are all from a minimum of 4 S-points higher than the vertical. Thank you!
Best regards,
G.F.
eBay Feedbacks
| ELECTRICAL SPECIFICATIONS | |
| Gain | 12.57dBi @20m (65.6ft) |
| Front/Back Ratio | 26.58dB @20m (65.6ft) |
| Impedance | 50 ohm |
| Power rating | 3 kW (optional 5 kW) |
| VSWR min. @50 ohm | 1.0:1 |
| Matching Method | Gamma Match |
| 3 dB Horizontal Beamwidth | 76.2° @20m (65.6ft) |
| PHYSYCAL AND MECHANICAL SPECIFICATIONS | |
| Weight | 11kg (24.2lb) |
| Boom length | 2m (6.56ft) |
| Longest element | 3.70m (12ft) |
| Rotation radius | 2.07m (6.8 ft) |
| Projected area [F=Flat - C=Cylindrical] | F = 0.31 m² (3.4 ft²) - C= 0.06 m² (0.6 ft²) |
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