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Feed Lines
Antenna feed lines and coax cables
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- Install a PL-259 on an RG-8X
- A better way to install PL-259 connectors on RG-8X type coax by Dan Richardson, K6MHE
- Do You Need an Antenna Tuner
- Maybe yes, maybe no. It all depends on the type of antenna and feed line you're using. QST Article in pdf format
- A T-Match ATU
- An homebrew antenna tuner project
- Antennas and Feedlines
- Long article on antennad and feed lines
- Antenna Tuning
- Tuning mobile and base antennas, measuring SWR.
- Coax Calculator
- Types of Coax Cable and Line Loss Calculator
- 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 By Ken Larson KJ6RZ
- About coax cables
- General considerations about coax cables
- Idiot's guide to coaxial cable
- A very beginner's guide to coax cables. Characteristics, detailed comparison of typical coaxial cables, commonly used connectors, and a few words about SWR.
- The Ultimate transmatch
- Usage and benefits of transmatch. A pdf document from a QST article made available for novices and beginners by ARRL
- Antenna Tuner Operation
- Antenna Tuner operation, correct way to tune an antenna.
- Build An LF Antenna Analyzer
- A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.
- HC DX Feeding that antenna
- Avoid noise, boost performance: make a perfect coax feed line. The perfect feedline, How to install your antenna properly, How to get the best from your coax
- A Coax Switch
- An inexpensive coax switch
Alphabetical
- Remote antenna switch
new
- A remote antenna change-over switching using relay powered over the coaxial feeder
[Hits: 36 | Votes: 0 | Rating: 0.00] - Transmission Line Calculator
new
- This web page allows you to perform transmission line calculations by using an applet instead of a Smith chart
[Hits: 43 | Votes: 0 | Rating: 0.00] - A Coax Switch
- An inexpensive coax switch
[Hits: 1496 | Votes: 2 | Rating: 7.50] - A simple SWR Meter
- This article describes a simple QRP SWR meter built using readily available parts.
[Hits: 1114 | Votes: 1 | Rating: 6.00] - A T-Match ATU
- An homebrew antenna tuner project
[Hits: 4490 | Votes: 4 | Rating: 9.25] - AA3RL Transmission Line Calculator
- Excel spreasheet that calculate virtually every transmission line parameter that one may need.
Include Length conversions, Reactance and Length of Stubs
[Hits: 1125 | Votes: 2 | Rating: 10.00] - About coax cables
- General considerations about coax cables
[Hits: 2440 | Votes: 3 | Rating: 5.33] - Actual Antenna SWR
- Easy for calculate formula which could be a wake-up call for you.
The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.
[Hits: 654 | Votes: 0 | Rating: 0.00] - Antenna Cable Loss and SWR
- Calculate Cable Loss from SWR and reverse. Text file with only two simply formulas
[Hits: 486 | Votes: 2 | Rating: 5.50] - Antenna Feed Lines for Portable Use
- Why twinlead isn't necessarily a low loss feed line.
[Hits: 479 | Votes: 0 | Rating: 0.00] - Antenna Transmatch Tips
- Tips on tuning antennas using Antenna Tuning Units also called ATU. This article explains the functions and ills of tuners, along with some guide- lines for building an ATU.
[Hits: 1345 | Votes: 2 | Rating: 10.00] - Antenna Tuner Operation
- Antenna Tuner operation, correct way to tune an antenna.
[Hits: 2042 | Votes: 0 | Rating: 0.00] - Antenna Tuning
- Tuning mobile and base antennas, measuring SWR.
[Hits: 3204 | Votes: 1 | Rating: 5.00] - Antennas and Feedlines
- Long article on antennad and feed lines
[Hits: 3232 | Votes: 5 | Rating: 7.80] - Automatic Band Decoders
- To build a Band Decoder to drive our remote relays, we need to supply the band information from the rig to the decoder
[Hits: 247 | Votes: 0 | Rating: 0.00] - Balanced Self Matching Feed Line System
- KE4UYP designed this Balanced Self Matching Feed Line System for people who want the very best feed line they can have on a Monobanded antenna
[Hits: 223 | Votes: 0 | Rating: 0.00] - Band Filters
- Experience of band filters, for a contest multi operator enviroenment
[Hits: 689 | Votes: 2 | Rating: 6.50] - Better Feedline Loss Measurements with Antenna Analyzers
- Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation
[Hits: 454 | Votes: 0 | Rating: 0.00] - Build An LF Antenna Analyzer
- A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.
[Hits: 1797 | Votes: 1 | Rating: 9.00] - Building High Power, High Q, Loading Coils
- This page describes the loading coil (inductor) that W8WWV built for my center-loaded 160 meter (1.83 MHz) vertical antenna.
[Hits: 1412 | Votes: 1 | Rating: 1.00] - Coax Cable Loss
- Table representing loss of Coax Cables in db per 100ft.
[Hits: 859 | Votes: 1 | Rating: 6.00] - Coax cable loss table
- Coaxial cable loss in db per 100 ft.
[Hits: 250 | Votes: 0 | Rating: 0.00] - Coax Cable Specifications
- Coax cables, pictures and specifications
[Hits: 130 | Votes: 0 | Rating: 0.00] - Coax cables specifications
- Useful data-sheet on RG coax cables compiled by NA5N
[Hits: 1103 | Votes: 1 | Rating: 10.00] - Coax Calculator
- Types of Coax Cable and Line Loss Calculator
[Hits: 3058 | Votes: 20 | Rating: 8.12] - Coax Switch 160-10 meter
- Cheap and Dirty Coax Switch by Glen E. Zook, K9STH
[Hits: 1015 | Votes: 3 | Rating: 2.67] - Coax velocity factor
- Coax Cables velocity factor article in pdf format
[Hits: 1365 | Votes: 9 | Rating: 4.78] - Coaxial Transmitting Chokes
- Understanding Common Mode and Differential Mode Currents on Transmission Lines by K9YC
[Hits: 66 | Votes: 0 | Rating: 0.00] - Comparator-based RF switch
- This is a concept paper, not a constuction article. There are too many variables to propose a one size fits all design. However, this paper should give you the basic idea how to do it
[Hits: 145 | Votes: 0 | Rating: 0.00] - 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: 238 | Votes: 0 | Rating: 0.00] - Diplexer design notes
- Standard diplexer design is based on singly-terminated Butterworth filters.
[Hits: 564 | Votes: 2 | Rating: 8.00] - Do You Need an Antenna Tuner
- Maybe yes, maybe no. It all depends on the type of antenna and feed line you're using. QST Article in pdf format
[Hits: 5968 | Votes: 5 | Rating: 5.20] - Effects of VSWR on Transmitted Power
- By James G. Lee, W6VAT
[Hits: 379 | Votes: 1 | Rating: 9.00] - ERP Estimator
- Calculate online, ERP in dB and dBi given PWR Frequency Coax lenght and type and antenna type
[Hits: 274 | Votes: 0 | Rating: 0.00] - Feeder Radiation
- Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation resulting in power loss and the radiation characteristics changes
[Hits: 102 | Votes: 0 | Rating: 0.00] - Feeding an End-Fed Antenna
- End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
[Hits: 1208 | Votes: 4 | Rating: 7.75] - Ground Problems
- Collection of articles about ground systems
[Hits: 513 | Votes: 1 | Rating: 7.00] - HC DX Feeding that antenna
- Avoid noise, boost performance: make a perfect coax feed line. The perfect feedline, How to install your antenna properly, How to get the best from your coax
[Hits: 1678 | Votes: 1 | Rating: 10.00] - Idiot's guide to coaxial cable
updated
- A very beginner's guide to coax cables. Characteristics, detailed comparison of typical coaxial cables, commonly used connectors, and a few words about SWR.
[Hits: 2438 | Votes: 2 | Rating: 3.00] - Install a PL-259 on an RG-8X
- A better way to install PL-259 connectors on RG-8X type coax by Dan Richardson, K6MHE
[Hits: 6033 | Votes: 7 | Rating: 7.57] - L Match ATU for QRP
- The L match is designed for the matching of random and long wires and should not be mounted in a metallic box/case, i used a small plastic food container which was the most expensive part of the project.
[Hits: 845 | Votes: 2 | Rating: 7.00] - LA6PB's split dipole
- A new method of feeding a dipole with toroids.
[Hits: 1183 | Votes: 0 | Rating: 0.00] - Let's talk transmission lines
updated
- Don’t neglect one of the most important parts of your station!
[Hits: 272 | Votes: 1 | Rating: 7.00] - Line Isolator System
- A system view of the line isolator
[Hits: 593 | Votes: 0 | Rating: 0.00] - Low loss Japanese coaxial cable
- 5D-FB,8D-FB,10D-FB cables offer very low attenuation comparable to that of famous Andrews' Heliax and 8D-FB is almost half that of standard RG-213 for an equivalent diameter!
[Hits: 264 | Votes: 0 | Rating: 0.00] - Magic T combiners splitters
- The magic "T" combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. It is not a magic bullet.
[Hits: 354 | Votes: 0 | Rating: 0.00] - Making a half wave coax cable
- How to make a half l or quarter l coax cable for a specific frequency
[Hits: 433 | Votes: 0 | Rating: 0.00] - Measuring Cable Loss
- Improving measurement accuracy when
low-power analyzers are used.
[Hits: 232 | Votes: 1 | Rating: 5.00] - Rainbow Antenna Analyzer
- A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings
[Hits: 1256 | Votes: 1 | Rating: 7.00] - Remote Control Antenna Switch
- The Remote Control Antenna Switch consists of two circuit boards. The control unit and the remotely controlled switch
[Hits: 42 | Votes: 0 | Rating: 0.00] - 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: 692 | Votes: 0 | Rating: 0.00] - Rolling your own balanced feed lines
- An article by VE1VQ that illustrate how to home made a balanced feed line
[Hits: 96 | Votes: 0 | Rating: 0.00] - 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: 700 | Votes: 0 | Rating: 0.00] - Simple VHF Gamma Match
- Plan of a simple VHF & UHF Gamma match contrstruction
[Hits: 1069 | Votes: 8 | Rating: 6.12] - Single Coil Z Match
- Single Coil Z Match, circuit Diagram and homebrewing notes
[Hits: 648 | Votes: 2 | Rating: 7.50] - SWR Calculator
- BesserNet Reflectometer is a fun SWR calculator and simulator Java applet
[Hits: 1443 | Votes: 9 | Rating: 5.44] - 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: 539 | Votes: 2 | Rating: 3.50] - The Coaxial Line
- Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
[Hits: 63 | Votes: 0 | Rating: 0.00] - The DK7ZB-Match for Yagis
- Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.
[Hits: 1264 | Votes: 0 | Rating: 0.00] - The quarter wave transformer
- A transient analysis of an inpedance transforming device, by W9DMK, in pdf format
[Hits: 395 | Votes: 1 | Rating: 1.00] - The simplest phased array feed system that works
- How to calculate "phasing line" lengths that actually work.
[Hits: 373 | Votes: 0 | Rating: 0.00] - The Ultimate transmatch
- Usage and benefits of transmatch. A pdf document from a QST article made available for novices and beginners by ARRL
[Hits: 2186 | Votes: 2 | Rating: 5.00] - Transmission Lines
- Whenever you choose a coax feedline, the frequency of operation is a very important consideration. Over the operating bandwidth of the coax the VSWR is low, typically 1.2:1 or better. Insertion loss is also an important parameter. It is usually specified in dB/foot and is a linear relationship.
[Hits: 680 | Votes: 0 | Rating: 0.00] - Transmission Lines
- Articles on SWR measurements and feed lines tuning.
[Hits: 599 | Votes: 0 | Rating: 0.00] - Transmission lines
- Transmission lines and measurement of their characteristics
[Hits: 82 | Votes: 0 | Rating: 0.00] - Transmission lines for dummies
- Myths and basic truths on transmission lines
[Hits: 684 | Votes: 1 | Rating: 10.00] - Transmitting Line Condition vs. SWR Table
- One another useful Table for the HAM's practice.
[Hits: 223 | Votes: 0 | Rating: 0.00] - Tuning Your Antenna
- Getting the best performance from your investment
[Hits: 332 | Votes: 1 | Rating: 8.00] - 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 By Ken Larson KJ6RZ
[Hits: 2725 | Votes: 4 | Rating: 5.00] - Using Delta Matching on HF Beams
- Using delta match with HF antennas design
[Hits: 1450 | Votes: 1 | Rating: 1.00] - Vericals. grounds systems and some history
- Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.
[Hits: 335 | Votes: 0 | Rating: 0.00] - VSWR Explained
- An interesting article on Voltage Standing Wave Ratio vs Current Standing Wave Ratio by EPARA
[Hits: 140 | Votes: 2 | Rating: 1.00] - Where Does the Power Go
- An Energy Analysis at an Impedance Discontinuity in an RF Transmission Line
[Hits: 192 | Votes: 0 | Rating: 0.00] - Wireless Antenna Connectors
- A chart and picture of some of the most common connectors
[Hits: 1112 | Votes: 0 | Rating: 0.00]
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