j boom

j boom

Pages: 1 2 [next]

• A 5 elements Vee log-yagi for 10m - 5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals
  [ Hits: 4609 | Votes: 11 | Rating: 7.82 ]

• 2 Meter Backpack Quad Antenna - This 2 meter 3 element cubical quad antenna is small, light weight and portable. A backpack antenna that is easy to put together in just minutes and parts store inside the boom making it ready for travel or storage.
  [ Hits: 2972 | Votes: 10 | Rating: 6.61 ]

• 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 ]

• The YU7EF 6m and 4m antenna - Realization of the YU7EF 6m(6elm) and 4m(7elm) duo band antenna on a 6m boom by OZ1DJJ
  [ Hits: 1719 | Votes: 2 | Rating: 4.5 ]
• 6 Elements Yagi for 50 MHz - Six elements yagi antenna for 6 meters band. This antenna design is based on the QuickYagi 4 software by WA7RAI, uses a 6.5 m boom, feature 12.0 dBi gain and 35dB front/back
  [ Hits: 767 | Votes: 1 | Rating: 10 ]
• Six elements for Six Meters - A Six-element Yagi Beam for 6 Meter by W1JR proiddes a power gain of 10.2 dB over a dipole it is built on a 24 foot long boom
  [ Hits: 467 | Votes: 2 | Rating: 6.5 ]
• 6 Elements Yagi Antenna on 50 MHz - This is a design based on the QuickYagi 4 software by WA7RAI with some changes for practical reasons. The beam uses 6.5 metres of standard 25mm square boom, 12mm diameter elements without tapers. The actual boom length used is 6.3 metres and all parts are readily available.
  [ Hits: 134 | Votes: 2 | Rating: 6 ]
• 6el LFA Yagi for 50MHz - This six element LFA Yagi for six meters has a 1.5 inch square boom with a 1.5 inch secondary boom beneath the first. This ensures the 7.3 metre long boom will not sag and will not require any guying. This antenna has 12.3 dBi Gain and just over 23dB F/B.
  [ Hits: 117 | Votes: 2 | Rating: 4 ]

• 432 Mhz 8 Element Quagi Antenna - How to build a 432 Mhz Quagi, using a wood-made boom, and gives a 13 DBI Gain
  [ Hits: 14173 | Votes: 43 | Rating: 7.84 ]

• Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
  [ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

• HF Log Periodic antenna - 10 to 20 meters band log-periodic antenna project with SWR Plots, boom lenght and element spacing.
  [ Hits: 4289 | Votes: 6 | Rating: 6.33 ]

• Boomless quad antenna  ^pop - VU2GX Girimajij article on boomless quad antennas
  [ Hits: 35261 | Votes: 9 | Rating: 6 ]
• 2 Meter 5 Element Quad - A five element quad antenna for 144 MHz DIY Project. This 2 Meter 5 Element Quad antenna was modeled using EZNEC, with a boom from a UHF TV antenna and CPVC pipe for spreaders. Constructed for 146MHz, it exhibits a gain of 10.7dB and an impedance of 75 ohms. Real-world results surpass the HT antenna, reaching over 20 repeaters up to 75 miles away. The design, costing around $10, employs simple tools for assembly.
  [ Hits: 1889 | Votes: 9 | Rating: 6.23 ]
• Quad for 10 and 15 meters - A light and sturdy Quad for 10 and 15 meters. Basic Quad antenna design considerations. Building and assembling a dual band HF QUAD antenna, designing and joining cross-arms and boom, assembling spreader and element wire installation notes. QST article.
  [ Hits: 334 | Votes: 0 | Rating: 0 ]

• Big Beam mast bracket - Big beam mast-to-boom hinged bracket articlel by G3BUG
  [ Hits: 805 | Votes: 0 | Rating: 0 ]

• VHF/UHF Yagi Antenna Design  ^pop - Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
  [ Hits: 147433 | Votes: 1105 | Rating: 6.95 ]
• VHF-UHF Long Boom Very High Performance Antenna Designs - Experimental Long Boom Antennas - CP, LPDA, multiband with several NEC Files for 50MHz 144MHz 222 MHz 432MHz but also 902MHz and 1296 MHz Antenna projects. Includes also for each antenna model, in a general comparison table each antenna characteristics including Directive Gain, G/T, E-F/R, H-F/R abd Boom Length. This is a great value comparison table of several commercial and home made VHF UHF antenna projects.
  [ Hits: 190 | Votes: 1 | Rating: 10 ]

• Boom microphone - A boom mic for the Yaesu FT 897 857 and IC-7000 done modifying a cheap PC headset by G8JNJ PDF File
  [ Hits: 11432 | Votes: 6 | Rating: 6.17 ]

• Aerial-Parts of Colchester - Online antenna parts store, providing many accessories for amateur radio antenna homebrewing. Boom joiners, aluminium parts, elements clamps, filters, ferrites, fasteners, plasti caps, dipole elements. Based in UL
  [ Hits: 153 | Votes: 0 | Rating: 0 ]

• Autonomous Satellite Tracker - This two-axis tracker tracks satellites with high accuracy entirely by reference to built-in spatial sensors in conjunction with a 9-DOF (degrees of freedom) sensor attached to the antenna boom and a GPS receiver.
  [ Hits: 1715 | Votes: 6 | Rating: 8.5 ]

Pages: 1 2 [next]