coax cable
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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 ]
- Corned Fed Delta Loop
- Author found a ratio between the lengths of the sides of the Delta Loop that give reasonably low SWR into a 50 ohm coaxial cable almost independent of the high above ground and other surroundings. This ratio also gives good results no matter orientation. Includes an online delta loop antenna calculator.
[ Hits: 167 | Votes: 0 | Rating: 0 ]
- Build your own HF balun
- A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
[ Hits: 248 | Votes: 1 | Rating: 10 ]
- Choking balun for 160-30 meter band
- Choking balun for lower HF and MF bands. (1.8MHz - 10MHz). Requiring a choking balun to isolate the potential RF pick up on the coax cable as it runs past equipment such as computer within the radio room at lower HF and MF frequencies a simple method of winding RG58 coax onto a Powdered Iron Toroid Core was constructed.
[ Hits: 196 | Votes: 3 | Rating: 6 ]
- BalUn for Delta-loop & Quad-loop antennas
- This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
[ Hits: 285 | Votes: 1 | Rating: 9 ]
- Build a Simple VHF Dipole Antenna for 2 Meters: A Beginner's Guide
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- This article serves as a beginner-friendly guide to constructing a simple VHF dipole antenna for 2 meters, perfect for novices in the hobby. With an emphasis on affordability and simplicity, it explains the basics without overwhelming technical details. Recommendations for coaxial cable and mounting methods are provided, offering practical solutions for effective communication. By following these instructions, novices can build a functional antenna without breaking the bank.
[ Hits: 107 | Votes: 1 | Rating: 7 ]
- Magnetic Loop HF antenna
- An homebrew HF Magnetic loop made with 2m length of 6mm diameter copper pipe formed into a near circle as the low loss inductor, a short length of coax as a capacitor,a short length of mains cable, again as a fixed tuned capacitor, a tunable 365pF air spaced capacitor, and a small Jackson C804 airspaced variable with a small 3-35pF trimmer in parallel
[ Hits: 130 | 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: 163 | Votes: 0 | Rating: 0 ]
- FBK 2m-70cm dualband coax antenna
- A travel, or a fixed vertical coax antenna originally designed by PA0FBK. This antenna is very easy to make from a piece of 50 ohm or 75 ohm coaxial cable, and can be either smooth, roll-up version, or rigid cable
[ Hits: 350 | Votes: 3 | Rating: 9.33 ]
- 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 ]
- Gigatronix Coax Cables
- Manufacturers of Coaxial Connectors, Push-Pull Latching Connectors, Coaxial Cable, Multicore and Coaxial Cable Assemblies based in UK
[ Hits: 136 | Votes: 0 | Rating: 0 ]
- Volda Communication
- Volda is specialized in telecom tower antenna line accessories such as cable hangers, coaxial jumpers, grounding buss bar kits, pole clamps.
[ Hits: 63 | Votes: 0 | Rating: 0 ]
- Midway Electronics
- Midway Electronics supplies the area with electronic components, wire, cables, amateur radio transceivers, QRP kits, CB transceivers, GMRS radios, Shortwave radios, power supplies, antennas, coax, connector and ham radio accessories
[ Hits: 215 | Votes: 2 | Rating: 3 ]
- Ecoflex-15 Degradation
- This article describes the problem detection on power loss events experienced during repeated usage of the Ecoflex-15 coax cable by members of the G3PYE contest minions and addressed to repeated coiling and uncoiling which has fractured the foil braid in numerous places.
[ Hits: 175 | Votes: 0 | Rating: 0 ]
- How to assemble a BNC connector
- How to install a BNC connector on a coaxial cable like the ELSPEC1030AF / HPF195RG and 58C/U cables
[ Hits: 194 | Votes: 0 | Rating: 0 ]
- Everything You Need To Know About Coaxial Cable
- An technical page on coaxial cables that describes what coax cables are, how do coax cables works, what are RG cables and difference with several coax cable types, what they are used for, connector types and cable sizes
[ Hits: 157 | Votes: 0 | Rating: 0 ]
- Coax Attenuation Chart
- Tables with attenuation in DB per 100 feet of several coaxial cables.
[ Hits: 347 | Votes: 5 | Rating: 3.4 ]
- Common-mode chokes Measurements
- Common-mode chokes are useful solutions for RFI reduction. Winding a few turns of coaxial cable on the FT 240-31 toroid can reduced the noise below the received noise floor. In this article author measure different chokes
[ Hits: 155 | Votes: 1 | Rating: 8 ]
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