coaxial antennas
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Antennas : 2M- VHF Coax Dipole
- A simple coax dipole antenna for 144 MHz by 9A7PJT
[ Hits: 1283 | Votes: 2 | Rating: 2 ]
- Build your own HF balun
- A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
[ Hits: 1639 | Votes: 5 | Rating: 5 ]
- 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 ]
- 1:49 unun for end fed half wave antennas
- 1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna. To match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer.
[ Hits: 386 | Votes: 10 | Rating: 8.1 ]
- Coax Antennas
- Amateur Radio Coaxial Antennas by G3TXQ
[ Hits: 396 | Votes: 0 | Rating: 0 ]
- Quarter Waves and Velocity Factor
- Coax Velocity Factor in Baluns, Does it Matter?
Test results show coaxial cable velocity factor does not always enter into stub length calculations especially in the world of Baluns
[ Hits: 208 | Votes: 0 | Rating: 0 ]
- 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: 275 | Votes: 2 | Rating: 6.5 ]
- Southwest Antennas
- High-performance rugged antennas and RF accessories such as magnetic mounts, RF coaxial gooseneck adapters, LNAs, BDCs, for law enforcment, military, maritime and video markets.
[ Hits: 243 | Votes: 0 | Rating: 0 ]
- American Radio Supply
- American Radio Supply, LLC is a supplier of quality radio communication parts and wireless connectivity components including coaxial connectors, cables, antennas.
[ Hits: 410 | Votes: 8 | Rating: 8.87 ]
- 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: 361 | Votes: 0 | Rating: 0 ]
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