rf current
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Antennas : 40M- W1ZY 40 meter moxon antenna
- W1ZY's 40 Meter MOXON is the product of 9 months of experimentation. The final array is reversible and constructed from No. 12 insulated wire fed through two RF current baluns
[ Hits: 3341 | Votes: 2 | Rating: 6 ]
- The Impact of Current Distribution on Array Patterns
- Technical Correspondence, QST, July 1990 - Why even "perfect" phased array element currents don't produce perfect patterns.
[ Hits: 753 | Votes: 1 | Rating: 10 ]
- A 4:1 Balun
- A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file
[ Hits: 21820 | Votes: 13 | Rating: 4.3 ]
- Detuning Towers
- The goal of detuning is not to avoid resonance, but rather to minimize re-radiation and/or current in the interfering structure.
[ Hits: 815 | Votes: 1 | Rating: 10 ]
- Homebrew RF chocke - Magnetic Longwire Balun
- RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
[ Hits: 3410 | Votes: 3 | Rating: 10 ]
- RF choke or 1:1 balun
- RF Choke to prevent hf currents on the feedline
or...1:1 Choke Balun, sometimes called the "UGLY BALUN"
[ Hits: 3246 | Votes: 6 | Rating: 3.83 ]
- Petlowany Antennas by K6NO
- WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length
[ Hits: 3765 | Votes: 9 | Rating: 6.22 ]
- A Modern Thermocouple Ammeter
- Thermocouple ammeters are very rare these days, but the job they were perfect for - measuring antenna currents - is still a modern requirement especially in respect to groundplane currents. By David A. Reid PA3HBB G0BZF
[ Hits: 2870 | Votes: 2 | Rating: 6 ]
- Basics of antennas
- The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.
[ Hits: 701 | Votes: 0 | Rating: 0 ]
- RF Measurement on W3EDP antenna
- RF Current measurements on a Long Wire W3EDP antenna
[ Hits: 628 | Votes: 2 | Rating: 5.5 ]
- ARRL Amateur Radio Map of North America
- This large, colorful wall map features current geographic detail and labels, grid squares, call sign prefixes, boundaries and more.
[ Hits: 948 | Votes: 0 | Rating: 0 ]
- Radioworks
- Source for high performance wire antennas, Current-type Baluns, Line Isolators, quality wire antenna parts and accessories.
[ Hits: 6239 | Votes: 5 | Rating: 5.8 ]
- Austin Antenna
- Austin Antenna employs leading-edge antenna technology in the production of the highest performance antennas currently available. Marine Antenna, Multi-band Mobile, Point-to-Point, Base Station, Wide-band Land Based, LPDA, Linear Omni, Triplexer, Scanner Antennas
[ Hits: 4138 | Votes: 7 | Rating: 8.43 ]
- MacTNC
- MacTNC is simple, configurable terminal software used by amateur (ham) radio operators to control a TNC (terminal node controller). MacTNC performs most of the same functions of other terminal software, but includes buttons for standard commands, and allows the user to configure additional buttons for special purposes. MacTNC works only user Mac OS X because it relies on Unix components of the current operating system.
[ Hits: 7128 | Votes: 11 | Rating: 6.94 ]
- Ground Systems
- Basic ground system functions, lightning and safety ground, RF return-path ground and induced ground currents
[ Hits: 1108 | Votes: 1 | Rating: 9 ]
- K8TM Articles
- This publications page lists articles on surface mount devices, amateur radio, soldering, shunts, and measuring large direct currents.
[ Hits: 1310 | Votes: 1 | Rating: 1 ]
- Build yourself an RF Ammeter
- An Easy way to Monitor RF, AC or DC current with one instrument by W5JGV
[ Hits: 3618 | Votes: 6 | Rating: 6.33 ]
- Build an All Band HF Air Core Choke Balun
- The main function of the Ugly Balun is to help eliminate rf currents from flowing on the outside of coaxial cable using the principle of choke action.
[ Hits: 780 | Votes: 12 | Rating: 7.84 ]
- R.F. Current Meter
- This R.F. current meter was developed to assist in measuring line currents in balance feed lines as used in the All Band HF Antenna.
[ Hits: 625 | Votes: 1 | Rating: 1 ]
- An adjustable RF Ammeter
- Measuring antenna current with and RF Ammeter
[ Hits: 578 | Votes: 1 | Rating: 10 ]
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