v antenna
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Antennas : Active- Active HF antenna
- An active HF receiving antenna circuit by G7BCJ
[ Hits: 3688 | Votes: 1 | Rating: 7 ]
- SWR: Maximum allowable VSWR
- VSWR (voltage-standing-wave-ratio) represents the degree with which an antenna is "matched" to the system impedance. Most modern antennas do not require any tuning for optimum performance. VSWR is one of the easiest parameters to measure and VSWR meters are becoming very popular antenna installation tools
[ Hits: 1237 | Votes: 3 | Rating: 3.33 ]
- 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: 4305 | Votes: 2 | Rating: 8.5 ]
- Copper J-Pole Antennas
- Conejo Valley Amateur Radio Club, article edited by Rory Eikland, KG6HCU and Ken Larson, KJ6RZ, they have had excellent experience building and using J-Pole antennas, and share their experience on planning VHF and UHF Jpole antennas.
[ Hits: 14124 | Votes: 15 | Rating: 7.07 ]
- HF Receiving Loop Antenna
- HF receiving loop antenna, an easy-to-make receiving loop antenna for HF
[ Hits: 19329 | Votes: 8 | Rating: 6.75 ]
- Tableantenna
- An invisible magnetic loop antenna mounted under a table by PY1AHD
[ Hits: 2199 | Votes: 0 | Rating: 0 ]
- A Magnetic Loop antenna for 7-21 mhz
- If you find external wire antennas obtrusive for amateur radio or short wave listening, then this is the antenna for you, is just 1 meter diameter
[ Hits: 3826 | Votes: 2 | Rating: 5.5 ]
- Travel loop antennas
- PA11019 Travel loop antennas, these antennas cover 6.300 to 29.200 mHz , handle 35 Watts and have a packing size of 43 cm, ideal for fieldwork, or mobile operations.
[ Hits: 3563 | Votes: 2 | Rating: 9.5 ]
- Understanding Standing Wave Ratios SWR
- We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver'
s output power verses the portion of that power reflected by the antenna system
[ Hits: 8713 | Votes: 8 | Rating: 4.75 ]
- Antenna Selection Made Easy
- This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
[ Hits: 2028 | Votes: 2 | Rating: 3 ]
- VHF/UHF Yagi Antenna Design
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- 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: 147401 | Votes: 1105 | Rating: 6.95 ]
- GAP Titan DX performance test
- GAP Titan DX Evaluation, antenna for 10m 15m 20m 40m 80m
[ Hits: 14569 | Votes: 18 | Rating: 5.84 ]
- 45SD105 Vlada
- Personal web site of a freebander, info on 11m digital modes, pictures of antenna projects
[ Hits: 728 | Votes: 2 | Rating: 7.5 ]
- Autotena
- Antenna manufacturer in Taiwan, products range are RF communication antennas ( CB, VHF, UHF, Dual band, Base Station, Marine, GPS,GSM, PCS, Cellular, DVB-T ) , Amplifiers , Mounting Kit ,Accessories & Related products.
[ Hits: 4287 | Votes: 8 | Rating: 4 ]
- Smith Chart Software
- SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size.
Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.
[ Hits: 1573 | Votes: 6 | Rating: 6.5 ]
- Turbolog
- TurboLog is a station management and logging program for the discerning radio amateur / hamradio operator. Besides powerful database and logging functions there is a fully integrated support for the control of typical radio station equipment, e.g. Transceivers, Packet radio, Morse and voice keyer, Digital modes terminal, Antenna switching, Acoustic alerting, and more. Trial version available
[ Hits: 1311 | Votes: 2 | Rating: 4 ]
- RF Coaxial Connectors
- RF coax(ial) connectors are a vital link in the radio spectrum. Coax connectors are often used to interface two units such as the antenna to a transmission line, a receiver or a transmitter. The proper choice of a coax connector will facilitate this interface.
[ Hits: 4329 | Votes: 0 | Rating: 0 ]
- Ferrite on Reducing RFI
- Using ferrite to reduce radio frequency interference with your PC monitor or antennas with your receivers or transceivers.
[ Hits: 2237 | Votes: 0 | Rating: 0 ]
- About Lightning Protection
- What You Should Know About Lightning Protection
by Joseph H. Reisert
[ Hits: 3118 | Votes: 1 | Rating: 8 ]
- QRM and noise reduction
- You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array.
Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
[ Hits: 5085 | Votes: 6 | Rating: 7 ]
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