Availability
COMTEK Parts and Accessories
COMTEK Current Feedline Chokes
The updated COMTEK CFC-50A 50 ohm Feedline Chokes consist of 75 heavy-duty mix-31 RF choke beads on a length of RG400 PTFE coax terminated at both ends with silver-plated PTFE PL-259/UHF male connectors and the correct length of heat-shrink tubing. COMTEK Current Feedline Chokes ensure that stray RF does not flow on the outside shield of your feedlines. They are typically installed at the antenna feedpoint connection. They may also be used where a long run of feedline leaves a remote antenna switch or a tower. They are also very effective at the shack end of a long run of on-the-ground or above-ground coaxial feedline, to block unwanted RF signals and noise picked up on the shield. These chokes provide excellent common mode impedance and handle up to 5 kW from 1.8 to 54 MHz. These chokes are assembled except for the tubing needs to be installed and heat-shrinked after the choke is positioned as it will be installed.
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$131.49
COMTEK 20VA 20-10 Meter Vertical Antennas
COMTEK 20VA Vertical Antennas are rugged, yet economical quarter wave antennas designed primarily to be used in sets with phased vertical array systems. They are well suited for Four Square arrays from COMTEK and DX Engineering or any other four-square array systems. These monoband 20VA antennas may be used on any single band from 20 meters through 17, 15, 12, 11 or 10 meters by adjusting the length accordingly. Designed by the people who know all about phasing, these antennas provide precise control of all parameters. These verticals are constructed from 6063-T832 (drawn, not extruded) aircraft-specification aluminum tubing. COMTEK 20VA antennas taper from a large 1.0-in. OD base section to a 3/4-in. OD top section. While they're built to withstand the most rugged environmental conditions, light guying is always recommended for phased systems to keep the spacing precise and minimize swaying. High-strength, UV-resistant EXTREN insulators that won't crack, peel, splinter, or fail will ensure you of years of long-lasting, reliable performance under adverse conditions. Mounting brackets are laser-cut by the latest state-of-the-art manufacturing equipment. Stainless steel hardware is used throughout and the antennas come complete with V-saddle clamps for installation to your ground mounted pipe. Pipe of 2.0-in. OD is recommended but the clamps will accept any OD from 1 in. to 2 in. Plumbing galvanized water pipe called 1-1/2 in. size is actually 1.9 in. OD and works well. For a single 20 meter vertical or a set of elements for a phased array, consider COMTEK 20VA Vertical Antennas from DX Engineering!
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$189.99
COMTEK ACB-4A Series Four-Square Control Consoles
COMTEK ACB-4A Series Four-Square Control Consoles are specially designed replacements for the COMTEK ACB Series Hybrid four-square antenna systems. Now featuring a 12V DC input, they are easily integrated into all stations, including those that can be run on 12V DC emergency power. They have four scratch pads that you may label and associated LEDs to indicate the array's directional positions. COMTEK ACB-4A Series Four-Square Control Consoles from DX Engineering are ready to control your COMTEK Hybrid Array.
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$169.99