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COMTEK Antennas
COMTEK CFC-50X Common Mode Feedline Chokes
COMTEK CFC-50X Common Mode Feedline Chokes are designed to suppress unwanted RF currents on the outside of the shield on coaxial feedlines. These 1:1 inline coaxial feedline chokes are built with fifteen Mix-31 ferrite beads on premium DX Engineering RG-8X coaxial cable, offering improved performance for a wide variety of antenna systems. COM-CFC-50X Key Benefits: • Provides Effective Shield RF Current Suppression from 1.8 to 54 MHz, helping eliminate common mode currents that cause RF feedback and noise inside the feedline. • Consistent and balanced pattern across frequency range: Excellent RF choking isolating the feedpoint prevents current imbalance, which preserves radiation pattern and antenna performance.
( 3 )
$59.99
COMTEK Vertical Feedpoint Connection Kits
If you are planning to build your own aluminum vertical four-square or 2-element phased arrays, COMTEK Vertical Feedpoint Connection Kits are what you have been looking for. These feedpoint assemblies ease the task of attaching a coaxial cable to your aluminum tubing. Silver SO-239s and stainless steel hardware ensure long life and reliability. Available individually or as a set of four, COMTEK Vertical Feedpoint Connection Kits from DX Engineering give you a great start to your project.
( 1 )
$79.96
Clearance
COMTEK Jerry Sevick W2FMI Series Current Baluns
COMTEK Jerry Sevick W2FMI Series Current Baluns were inspired by the writing of Jerry Sevick, as published in his book "Understanding, Building, and Using Baluns and Ununs" also available from DX Engineering. COMTEK baluns are value-engineered for maximum performance at a reasonable cost. They provide a superb, efficient transition between unbalanced coax and balanced antennas. COMTEK Baluns feature: * Jerry Sevick design with modern improvements from DX Engineering's in-depth balun research and development * Unique high-voltage compensating capacitors for unequaled SWR bandwidth * Outstanding ferrite-mix coated toroid core with special design to accommodate close coupling without excessive stress * Exceptionally high and consistent common mode impedance across the specified bandwidth, which provides isolation where it is needed most * Special wire size selection and Teflon-insulated wire sleeves provide exact impedance matching and superb insulation, unlike common Thermaleze wire * Typical insertion loss is less than 0.2 dB * Power handling on HF is 3 kW CW and 5 kW SSB on single core models, 5 kW CW and 7 kW SSB on dual core models * May be used to 54 MHz with reduced ratings * Gasketed SO-239 connectors are silver plated and have Teflon insulation * Sealed in a weatherproof 4 in. x 4 in. x 2 in. NEMA box * Stainless steel hardware Note: Polarity markings on baluns are used for matching phase on balanced antennas when stacking beams for a phased array. Also, the positive terminal should be connected to a vertical element or Inverted-L and the negative terminal goes to the radials. For most regular applications on one antenna, including beams, dipoles and most wire antennas, balun polarity doesn't matter. The best Amateur Radio baluns in the world are from DX Engineering. That includes COMTEK Jerry Sevick W2FMI Series Current Baluns!
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$104.99
$68.24
Clearance
COMTEK Stack 3 Yagi Switch Control Consoles
COMTEK Stack 3 Yagi Switch Control Consoles are available as replacements for Stack 3 Yagi Systems. When connected to the Stack 3 Switch Relay Unit, these control consoles allow you to select one antenna, all antennas, or any combination of two antennas. Indicator lights for each antenna tell you at a quick glance which antennas are selected. Choose either 115 V AC or 12 V DC control console operation. Keep using your Yagis together! Order COMTEK Stack 3 Yagi Switch Control Consoles from DX Engineering!
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$124.99
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$125.99
$56.25
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$63.00