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Sotabeams Antennas
SOTAbeams HF Antenna Trap Kits
SOTABEAM HF Antenna Trap Kits are a clever design with flexible mounting arrangements to make them easy to build and use. They are available in two power levels, 100 watt traps are listed here as SBM-HFAT-101 and 20 watt traps are SBM-HFAT-102. Each kit includes parts to build two (2) traps. Make your portable single band antenna into a multi-bander with our lightweight antenna traps. You decide on the frequency when you build them; recommended range 7 - 25 MHz. Alignment of each trap is accomplished easily with an antenna analyzer. For QRP super lightweight traps, see SOTAbeams PICO TRAPS for 10 Watts (DX Engineering part SBM-PITK-100). Included in each SOTABEAMS HF Antenna Trap kit: -2 x high quality trap PCBs with plated through holes -4 x 100pF 1kv capacitors (used in series or parallel to give 50pF, 100pF and 200pF options) -2 x mounting hardware for toroids -2 x toroids (T94-6 for 100W and a lighter T68-6 toroid for 20W) -Enameled copper wire to suit the power level Traps can be used in one of two ways. These SOTAbeams traps can be used either way, it's your choice: 1) By using a trap resonant on the higher frequency that you want your antenna to work on, traps work as an effective isolator. In this application, the trap needs to be resonated in the band. This configuration makes the antenna easy to adjust as the sections do not interact much. In this configuration, our traps show a loss of typically < 0.7 dB. 2) By using a trap resonant between the two bands that you want to use (typically 1 to 2 % percent below the band edge of the higher band), losses are reduced but adjusting the antenna is much more difficult as the two sections interact. In this configuration our traps show a loss of typically < 0.3dB. We recommend that you resonate your traps at the lowest edge of the band that the trap is to work at. So for a 20m-40m dipole, resonant your trap at 14.0 MHz. This tends to be a reasonable compromise between trap loss and ease of antenna adjustment. Instructions are linked in the Documents tab on the "More Detail" page. SOTAbeams HF Antenna Trap Kits Specifications: PCB Dimensions: 2.599 x 1.181 in. (66 x 30 mm) Insertion Loss: 0.3 – 0.75 dB depending upon resonant frequency Impedance at resonance: 20,000 Ohms, typical Weights: 20 W traps 0.4 oz. (10.6 g), 100 W traps 0.6 oz. (16 g)
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$24.99
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$31.99
SOTAbeams Multi-Function Guying Kit for Tactical 7000hds
SOTAbeams MFGK-7000 is the Multi-Function Guying Kit for Tactical 7000hds. Included in this all-in-one pack you will find everything required to cover most guying requirements for SOTAbeams most popular Tactical 7000hds portable mast. Included in the kit is: * (1) Tactical Guying Ring (35 mm) * (1) Tactical Guying Ring (22 mm) * (2) Tactical Top Insulators * (1) Wire Winder (Green) * (1) 50 m (160 ft.) reel stealth cord * (1) Antenna bag (Green) * (4) Aluminum anchor pegs This kit offers savings over buying the items individually and allows users greater flexibility in guying options when used with the Tactical 7000hds compact heavy-duty 7 m (23 ft.) mast.
Not Yet Reviewed
$45.99
SOTAbeams Multi-Function Guying Kit for Tactical Mini Mast
SOTAbeams Multi-Function Guying Kit for the Tactical Mini Mast is SOTAbeams MFGK-102 and is DX Engineering SBM-MFGK-MINI. Included in this package is everything needed for guying SOTAbeams small mast, the Tactical Mini. Included in this kit is: * (1) Lightweight Guying Ring (29.6 mm I.D.) * (1) Lightweight Guying Ring (9.6 mm I.D.) * (2) Top Insulators * (1) Wire Winder (color may vary) * (1) 50m (160 ft.) Reel Hi-Viz Cord * (1) Antenna Bag (color may vary) * (4) Aluminum Anchor Pegs The MFGK-MINI offers a useful saving over buying the various items individually and allows users great flexibility in guying options.
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$43.99
SOTAbeams Antenna Center and 4:1 Transformers
SOTAbeams Antenna Center and 4:1 Transformers are a very handy feed point for a low-power lightweight portable HF doublet antenna project. Available as a kit (SBM- ACBA-101) or already built (SBM-ACBA-102). These are very versatile dipole center insulators that include these outstanding features: • Coaxial Cable Strain-Relief Built In • BNC female Connector • Water-Resistant Construction with Integral UV Resistant Cover • Antenna Wire Strain-Relief Built-in • Binding Posts for Antenna Wire Connections • Mounting Holes for Center Support Rope • Lightweight – 3.1 oz. (88g) • High Performance by Design - Flat Response from 3-30MHz • Loss: < 0.2dB @ 14MHz • Matched SWR < 1.15:1 1.8-30MHz (< 1.50:1 0.5-60MHz) • Power Rating: 125W SSB-CW; 30W Digital The SOTAbeams Antenna Center and 4:1 Transformers are useful for pre-matching higher impedance antenna systems such as doublets and folded dipoles to bring the SWR into the matching range of internal antenna tuners. In that application, the length of the feeder between the transformer and the tuner must be kept to about 6 ft. These Antenna Centers have a 4:1 matching transformer that is sometimes referred to as a balun. This isn't a choke, so strictly speaking it's not a choke balun, but it's typically referred to as a voltage balun. This transformer is designed with a lip that can be sealed using a silicone sealant if required for use in more permanent installations. We do not supply the Balun sealed as this allows users to gain access to the enclosure and allow any buildup of moisture to drain away. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information.
Not Yet Reviewed
$25.99
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$45.99