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Antennas : Feed Lines- 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 ]
- Setting the SWR of Your Antenna
- SWR (standing wave ratio), is a measurement of how efficiently your antenna system will radiate the power available from your radio. In simple terms, your radio would like to radiate all of its power, but can only do so if the other components cooperate
[ Hits: 1253 | Votes: 0 | Rating: 0 ]
- G5RV multi-band antenna
- Multi-band centre-fed antenna capable of very efficient operation on all HF bands, specifically designed with dimensions which allow it to be installed in gardens and other open spaces which accommodate a reasonably-straight run of 31.1m (102 ft) for the flat-top standard model.
[ Hits: 7302 | Votes: 8 | Rating: 7.38 ]
- Some J-Poles That I Have Known
- The varieties of twinlead J-Poles and some performance standards, L. B. Cebik, W4RNL
[ Hits: 4303 | Votes: 4 | Rating: 3.75 ]
- The Lindenblad Antenna: The Ultimate Satellite Omni Directional Aerial
- This Antenna project is a bit more complex than other omni antennas for satellite use, but it is much easier and cheaper than a standard tower mounted circular polarized azimuth and elevation rotating beam system.
[ Hits: 440 | Votes: 5 | Rating: 6.8 ]
- Cebik Moxon Rectangles
- The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio and a direct match for the standard 50-Ohm coaxial cable.
[ Hits: 3328 | Votes: 5 | Rating: 5 ]
- Portable HF Antenna for the field day
- This article describes a project of asymmetrical hatted vertical dipole, a portable antenna that can be used for field day operations, sota, campings or even for fixed installations. This is a freestanding 20-10m antenna that is really easy to build, easy to tune and relatively easy to carry.
[ Hits: 1643 | Votes: 2 | Rating: 7.5 ]
- 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 ]
- Rig Catalog Museum
- JG2KJU collect brochures and catalog of vintage radios, including kenwood yaesu icom standard national nec star ten-tec and many more
[ Hits: 2520 | Votes: 6 | Rating: 7.33 ]
- The One Man Tower
- Complete tower system incorporates rotator mount, and lateral support collars. You never have to climb again - and forget the hassle of tilting over to work on large arrays. The "One Man Tower" is the strongest dmall footprint free standing self erecting tower in the world
[ Hits: 6783 | Votes: 23 | Rating: 9.48 ]
- CQHAM.ru manuals
- Kenwood Icom Standard Alinco and many more manuals
[ Hits: 8794 | Votes: 75 | Rating: 6.44 ]
- BSF Taiwan
- Nation Standard Time and Frequency Laboratory
Telecommunication Laboratories (TL)
ChungHwa Telecom Co. Ltd.
[ Hits: 1013 | Votes: 1 | Rating: 9 ]
- Pakistandxers
- Pakistan swl dxers
[ Hits: 769 | Votes: 3 | Rating: 5.33 ]
- APRS-Beacon
- The purpose of the APRS-Beacon is to provide simple APRS-compatible position beacons for up to three Objects. It is designed to 'stand alone' and does not monitor other traffic on the frequency. It can use a single-port TNC (in 'native' mode), a single- or dual-port TNC in Kiss mode or the AGW Packet Engine in order to transmit on up to four radio ports.(When running with AGWPE, APRS-Beacon will also work with Windows 2000)
[ Hits: 3421 | Votes: 7 | Rating: 2.57 ]
- SWR Calculator
- Computes the Standing Wave Ratio, given the power readings on a line.
[ Hits: 2029 | Votes: 16 | Rating: 5 ]
- Band Master
- Band Master is a program for Radio Amateurs that downloads DX spots and displays them in different ways, including a graphical band map. It can be used either as a stand alone application or as part of a logging or contesting software. Price USD 25
[ Hits: 3582 | Votes: 0 | Rating: 0 ]
- Morse Maker
- MorseMaker is an up-to-date replacement for the Morse Machine shown further down this page. It has been re-written using a different programming language and is now entirely 'stand-alone' requiring no run-time support files. This version also works with Windows XP and can use the soundcard but please note that, unlike its predecessor, it does not split the alphabet into smaller 'learning' blocks and does not incorporate the Morse reader.
[ Hits: 2389 | Votes: 9 | Rating: 6.23 ]
- M0KGK SDR Decoder Software
- KGKSDR is my attempt at some SDR decoding software. I'm putting this software together purely as a learning exercise, to better understand the mathematics behind SDR in general.
[ Hits: 4031 | Votes: 10 | Rating: 8.1 ]
- HamView
- A freeware program to dig out weak signals buried in noise, functionally similar to the excellent FFTDSP of AF9Y, but with the added bonus of real time audio filtering of the incoming signals. Just point and click with the mouse, and the selected signal will stand out from the QRM and noise.
[ Hits: 7559 | Votes: 3 | Rating: 5 ]
- VNA-dsp / Antenna Analyzer
- This project is an attempt to build a portable standalone VNA (Vector Network Analyzer).
[ Hits: 2173 | Votes: 1 | Rating: 1 ]
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