antenna choke

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antenna choke

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Antennas : 160M
  • Isolation chokes for 160m verticals - An article on how much impedance you really need and how small can be a chooke for top band vertical antennas by N6LF
    [ Hits: 628 | Votes: 0 | Rating: 0 ]
Antennas : 20M : 20 meter Yagi antennas
  • 2-Element-Yagis for HF  pop - 2-Element parasitic Yagis for the Shortwave-Bands 10-12-15-17-20-30m. The antennas are feeded with the DK7ZB-match. A quarter-wave choke of coax is grounded at the socket.
    [ Hits: 50022 | Votes: 146 | Rating: 7.08 ]
Antennas : 40M : 40 meter Dipole Antennas
  • 40m loaded dipole - This is an short dipole for 7 MHz. Total length of this dipole is just 10 meters, 33 feet. Missing lenght is balanced by a coil made of 49 turns of a 40mm diameter pvc pipe. The use of a choke balun is recommended, as always, to adapt the unbalanced coax cable to the balanced antenna, and to prevent RF feed back along the coax shield.
    [ Hits: 192 | Votes: 4 | Rating: 8.75 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 2 element Yagi for 50 MHz - This 6 meter 2 element yagi antenna is simple, compact and effective antenna for 50 Mhz. The design antenna was optimized with AO for best match to 50 ohms, no matching network. A choke balun is recommended to decouple feedline currents.
    [ Hits: 532 | Votes: 3 | Rating: 3 ]
Antennas : Baluns
  • Baluns and common mode chokes - Voltage baluns versus Current baluns. When to use them, differences, and typical usage in feeding antennas, or in resolving radio frequency interferences.
    [ Hits: 401 | Votes: 1 | Rating: 10 ]
Antennas : End-Fed
  • How to make an end-fed antenna work  pop - Here is a sure fire way to make end-fed halfwave antennas fed with a 50 ohm coupler work - without long radials, grounds, chokes, voodoo.
    [ Hits: 43947 | Votes: 30 | Rating: 6.71 ]
Antennas : Feed Lines : Choke
  • Choke balun - Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably
    [ Hits: 573 | Votes: 11 | Rating: 7.27 ]
  • Noise Reduction on 40m - DF9CY implementation of W1HIS suggestion of inserting a common mode choke into a 40m antennas feed-line.
    [ Hits: 1383 | Votes: 0 | Rating: 0 ]
  • Homebrew RF chocke - Magnetic Longwire Balun - RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 3410 | Votes: 3 | Rating: 10 ]
  • About Common Mode Choke - A general article on CMC, common mode choke include a description and tipical usage.
    [ Hits: 886 | Votes: 0 | Rating: 0 ]
  • Trap on Coax Cable - A trap on the coaxial cable, also known as choke, helps to eliminate the sneaking of the reflected RF- energy to the shack. The trap can be made from the coaxial cable that feeds the antenna
    [ Hits: 961 | Votes: 2 | Rating: 6.5 ]
  • High Performance common-mode chokes - May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances.
    [ Hits: 681 | Votes: 1 | Rating: 10 ]
Antennas : Homebrewing Techniques
  • PVC Yagi antennas - techniques - Collection of different techniques to homebrew PVC yagi antennas, including elements assembling, baluns and chokes, radiator box tips and tricks by dk7zb
    [ Hits: 1609 | Votes: 4 | Rating: 3.5 ]
Antennas : J-Pole
  • 6 m JPole Antenna - Based on original G2BCX design this J-Pole antenna for the six meter band is made with a homemade ribbon cable. The antenna shown in this article includes a coaxial cable choke feed to remove RF currents from flowing on the outer of the cable.
    [ Hits: 1767 | Votes: 6 | Rating: 6 ]
Antennas : VHF UHF
  • DIY Dual Band 144-440 MHz vertical antenna  updated - A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.
    [ Hits: 1367 | Votes: 14 | Rating: 5.5 ]
Manufacturers : Antenna Parts
  • CWS Coil Winding Specialist - Manufacturer of transformers, inductors coils and chokes. Custom winding, EMI / RFI Filters, Antenna Windings on ferrite rod, Antenna Winding on phenolic. Any antenna coil designs.
    [ Hits: 591 | Votes: 1 | Rating: 1 ]
Manufacturers : Antennas
  • MyAntennas.com - MyAntennas.com offers standard and custom made multiband antennas, Baluns, Common Mode chokes and accessories. All products are designed and made by Danny Horvat, E73M an antenna design engineer formerly employed by Cushcraft Corporation.
    [ Hits: 780 | Votes: 1 | Rating: 1 ]
Operating Modes : Mobile
  • How to wind a choke - How to build and properly wound an efficient RF choke to protect antenna controller in mobile setups
    [ Hits: 432 | Votes: 0 | Rating: 0 ]
Shopping and Services : Kits and Components
  • Radiodan - W7RF - BIRD RF power measuring, new and used, HENRY RF power amplifiers (used HF amps), TOHTSU coaxial relays, SAMLEX power supplies, RFI chokes reduce interference, Parts parts, tubes, Used amplifiers, radios, antennas and accessories, Los Angeles, CA.
    [ Hits: 2068 | Votes: 3 | Rating: 10 ]
Technical Reference : Vector Network Analyzer
  • miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
    [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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