coax

359 links - and 3 categories

YBN 28-5w - 5 Elements Yagi for 28 MHz - A 5 element yagi beam antenna for ten meters band with full dimentsions, eznec file and coax match informations for 50 ohms feed line
[ Hits: 917 | Votes: 4 | Rating: 3 ]

Squarooka Antenna - squared bazooka for 2 meters band - Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel. In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
[ Hits: 356 | Votes: 0 | Rating: 0 ]

3 Element Beam for 50 MHz - A six meter band 3 element yagi beam antenna project with shortened elements using coax cables with the outer ends stripped and the center conductor shorted in somewhat of a Bazooka antenna.
[ Hits: 424 | Votes: 1 | Rating: 8 ]

Making a good balun - The normal way to make a good balun is to wind a core with a bifilar winding about 8-10 turns, and then connect the coax to one side and the antenna to the other.
[ Hits: 499 | Votes: 0 | Rating: 0 ]
Common Mode Currents on Coax - These baluns are used to attenuate the common mode current that flows on the outside of the coaxial feed line.
[ Hits: 176 | Votes: 0 | Rating: 0 ]

Bazooka para 40 metros - A bazooka coax antenna for 40 meters band design by CA6TYS
[ Hits: 688 | Votes: 0 | Rating: 0 ]
KC0KJF Doble Bazooka - The Double Bazooka Dipole is a very efficient single band antenna which is very quite,and does not require the use of a balun. This antenna consists of coax (RG58) with the shield split at the center and the feedline attached to the open ends.
[ Hits: 988 | Votes: 2 | Rating: 3 ]
Bazooka Antenne - A bazooka antenna design in German with dimensions for 20m and 40m band with RG174 coax cable stronger than the common RG58
[ Hits: 1270 | Votes: 3 | Rating: 4.67 ]

Chocking the End-Fed Antenna - Stop common-mode current when transmitting with an end-fed antenna. Unbalanced antennas are very prone to currents on the outside of the coax.
[ Hits: 828 | Votes: 1 | Rating: 8 ]

Practical Yagi Building - A practical guide on hombrewing Yagi antennas, including notes on Driven Element, Transformation & Symmetrising Coax Lines, Full Boom length vs. electrical length, Elements & Insulators on Boom and additional tips and tricks, in English and German
[ Hits: 364 | Votes: 0 | Rating: 0 ]

Horizontal Loop Antenna Experiments - The HF horizontal loop has been around for many years now. This article includes a YouTube video and discusses the reasons for looking at this antenna, its design, and its installation. There are some on-air comparisons against three regular double bazooka (coax) dipoles and the Par SWL End-Fed antenna.
[ Hits: 926 | Votes: 5 | Rating: 8 ]

DIY Dual Band 144-440 MHz vertical antenna - 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: 1377 | Votes: 14 | Rating: 5.5 ]

HyEnd Company - HyEnd is a dutch amateur radio antenna manufacturer. Makers of the popular HyEndFeed Antennas, produce Baluns, bandpass filters and selle Line isolators, coax cables and connectors.
[ Hits: 197 | Votes: 0 | Rating: 0 ]

ABR Industries - ABR Industries Is A Full-Line American-Made Coax (RF) Cable Assembly Manufacturer. Coax Cables, Connectors, Custom Coax Cable Assemblies, Times Microwave LMR-Series.
[ Hits: 126 | Votes: 1 | Rating: 10 ]

KF7P Metalwerks - Metal products manufacturer for Grounding, cable management, surge arrestors, tower accessories, Coax standoff arms for telescoping towers, Safety stand tower platform, Mast steps, tower installation tools
[ Hits: 353 | Votes: 3 | Rating: 6.67 ]

Ameritron RCS-10 Review - Review of the Ameritron 8 Antenna Remote Coax Switch with SO-239 connectors on 120V
[ Hits: 146 | Votes: 4 | Rating: 7.25 ]

Five Antennas Switch Box - A project of a 5 Antennas Relay Switch Box, all Switches & Relays have both contacts wired in parallel to improve reliability of operation, to prevent static build up, when an antenna is not in use the feeder coax is grounded.
[ Hits: 1249 | Votes: 1 | Rating: 10 ]

QRO Coaxial Relay for 50 MHz - Build a SPDT coaxial relay that can be used as a main Transmit/Receive relay or an A-B switch to select between two different 6m antennas
[ Hits: 362 | Votes: 0 | Rating: 0 ]
Velocity Factor of Coax Cables - Undertanding the velocity factor in coax cable feed lines. Meaning of the veolcity factor index related to the RF speed of a signal inside the coax cable.
[ Hits: 168 | Votes: 2 | Rating: 10 ]
All about coax cables - Coax cable nomenclature, the RG Family, line loss explained, importance of shieding on coax cables, velocity factor explained, and differences among stranded vs solid wire
[ Hits: 218 | Votes: 0 | Rating: 0 ]