trap

trap

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• 40-80 Coax Trap Dipole - Full article on how to build a home-made wire dipole antenna for 40 and 80 meters band. Article is fully in italian, as it was published on ARI RadioRivista, but is plenty of self explaining pictures that will guide you on homebrewing this trapped dipole antenna for the lower amateur radio bands.
  [ Hits: 265 | Votes: 3 | Rating: 9.33 ]

• 40m 2 elements HQ Traps Yagi - The longest element has a total length of 14m and has a boom length of 5.5 meters featuring a total bandwith of 166 kHz
  [ Hits: 174 | Votes: 1 | Rating: 8 ]

• Top Loaded Vertical Antenna for 80 Meters Band - Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
  [ Hits: 268 | Votes: 0 | Rating: 0 ]
• An Antenna for 75 and 80 Meters Band - A trap antenna dipole covering two differen bands made reusing an old 160/80m inverted vee antenna.
  [ Hits: 319 | Votes: 0 | Rating: 0 ]

• Trapped Dipole Antenna for 20-30-40m - An 20 30 40 meters trapped dipole antenna plan for sota and portable operations.
  [ Hits: 267 | Votes: 1 | Rating: 10 ]
• 160-80-40 Metre Trapped V-Dipole - A Trapped dipole inverted V antenna for lower HF Bands. Construction details are for temporary installation. Permanent installations will require additional ruggedising and waterproofing however the basic electronics concepts remain the same. This project includes SWR plots for the three bands and pictures details of the homemade traps.
  [ Hits: 109 | Votes: 0 | Rating: 0 ]
• Make your own 40/80 Dipole - Make your own dipole for 40 and 80 meters band, assembling standard product parts like 40 meter traps, the 1:1 balun and insulators
  [ Hits: 125 | Votes: 0 | Rating: 0 ]

• Trapped five band EFHW SOTA antenna - A trapped multi band end-fed-half-wave antenna for 40/30/20/17/15m.
  [ Hits: 424 | Votes: 1 | Rating: 10 ]

• Coax Notch Traps - Attenuating adjacent bands - Targeted Attenuation for Adjacent Bands. Filtering is needed between the two rigs to prevent physical damage to the RX front end and to prevent the kinds of high-signal overload conditions like desense and IMD - as well as containing harmonic energy.
  [ Hits: 134 | Votes: 0 | Rating: 0 ]

• Multiband trap dipole - This antenna is a classical antenna working on 7,10,14,18,50 MHz is implemented with three traps for 30, 17 and 6 meters
  [ Hits: 271 | Votes: 0 | Rating: 0 ]

• Low Cost Antenna Traps - How to home made antenna traps with material you can easily find, and how to properly tune it.
  [ Hits: 470 | Votes: 5 | Rating: 6 ]
• Tuning Antenna Traps - The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency. This article explains a method using a RF signal generator at +10dBm output into the coaxial trap.
  [ Hits: 276 | Votes: 2 | Rating: 6.5 ]
• Constructing and Using Chokes - Using Chokes and Traps: how to make them, how they work.
  [ Hits: 389 | Votes: 0 | Rating: 0 ]
• RF Trap Resonant Frequency - RF traps for a lightweight 40/30/20/17/15m inverted V dipole antenna for SOTA purposes and how you can use a modern antenna analyser to find the resonant frequency of a HF trap.
  [ Hits: 199 | Votes: 0 | Rating: 0 ]
• Optimizing Coax-Cable Traps - A document that will guide you on Coaxial-Cable trap optimization process to gain on global antenna performance and on increasing effective bandwidth.
  [ Hits: 166 | Votes: 0 | Rating: 0 ]

• Trapped vertical Antenna - This antenna is an omnidirectional and multiband and it is well suited for DX enthusiasts with limited space. Each of the parallel circuits (trap) behaves like an isolator on its resonant frequency.
  [ Hits: 356 | Votes: 7 | Rating: 2.71 ]
• 20-30m Vertical Antenna - Homebrew project for a vertical antenna with a coaxial-cable trap, that works on 20 and 30 meters band.
  [ Hits: 73 | Votes: 0 | Rating: 0 ]

• W3DZZ Multiband Antenna - An easy to build and extremely high performance antenna, works perfectly on all HF bands 3.5-28 MHz with some compromises, it is basically an half wave dipole for 40-80 meters, an LC circuit or trap 40 meters allows you to use a single radiating element.
  [ Hits: 464 | Votes: 3 | Rating: 7.67 ]

• miniVNA PRO Installation Notes - Notes on installing the miniVNA PRO software, making a calibration standard, a trap tuning loop.
  [ Hits: 170 | Votes: 0 | Rating: 0 ]

• Enhancing Frontend Performance with Optimized Band Pass Filters - This article explores the nuanced design challenges of Band Pass Filters (BPF) in radio receivers, balancing low insertion loss, high stop band rejection, and narrow bandwidth. The focus is on the "Series-Trap, Shunt-C" topology, resonator count impact, and meticulous layout design for superior stop band performance across various frequency bands
  [ Hits: 82 | Votes: 0 | Rating: 0 ]

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