Best Links of the Week Archives

Micro24 Cigarette Pack SSB QRP Transceiver for 20m

DK7IH

The Micro24 is a ultra compact microsize QRP SSB transceiver for the 20 meters amateur radio band. This transceiver is so small that it fits into one hand.

Moxon Antenna for 7 MHz

TA7OM

Homemade moxon antenna for the 40 meter band. This article is not very descriptive but includes some very detailed images

9 Circle RX antenna

PI4CC

The receiving antenna setup for the top band, made with a 9 elements vertical antenna array, remote controller and remote relais.

A Moxon Antenna for Satellites

vk7ben

How to make a dual-band VHF/UHF handheld Moxon Antenna to work satellites

Top Band Receive Loop Antenna

TA7OM

In this article the author shows the receiving loop antenna for 160 meters band installed at his QTH. Diagram and movie available. Article in in Turkish but can be translated in english

A Cheap Portable Mast Support

WB3GCK

A homemade simple and inexpensive portable antenna support, handy for quick trips to the field and other portable operations

NanoVNA

The NanoVNA is a very compact handheld Vector Network Analyzer. The NanoVNA is tiny and portable analyzer, and it offers a high performance capabilities with an embedded lcd display.

Homebrew a High Performance SSB RTX for 14 MHz

DK7IH

This article describes the construction of a high performance transmitter and receiver for SSB (voice) communication covering the 14MHz (20 meters) high frequency amateur radio band with output range 15 to 20 watts and a top audio sound quality both on transmit and receive.

NanoVNA Saver

NanoVNA

This software connects to a NanoVNA and extracts the data for display on a computer, and for saving to Touchstone files.

The Micro20 III Pocket Size SSB RTX for 20m

DK7IH

DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306

The post Top Amateur Radio Websites – Issue 1939 appeared first on The DXZone.

Guohe Electronics

Guohe

Chinese manufacturer of Software Defined Radio for commercial, public and amateur radio market. Markers of H1 H1Plus H2 Q900 SDR transceivers

A very efficient half size 40 meter Vertical Antenna

Ray Ring

A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.

HamBuilder

Amateur radio kits dealer, online shop for ham radio transceiver kits.

Mighty Woof 2m 70cm Dual Band Fan Dipole

WB0TGE

This article describes a unique copper pipe fan dipole that the author home made and that provides fantastic results.

Make your own 2 metre 5/8 whip antenna

VK4ADC

This article is about a home made project of a whip antenna for 2 meters band. Includes lenght of whip for all frequencies from 140 MHz to 151 MHz both in mm and inches

sodiraSDR – Software Radio

Bernd Reiser

Software Defined Radio (SDR) for analog and digital modulation modes, can demodulate AM envelope, AM synchronous, AM stereo, LSB, USB, FM, FM Broadcast, DRM30, DRM+

Portable Mast

ZR6KMD

This is a schematic drawing of a project for the construction of a portable mast that can easily be made with PVC pipes.

History of The Amateur radio LOCATOR System

OK2KKW

This article taken from the IARU Region 1 VHF handbook, is about the history of the original Locator System named QRA-Locator consisted of just five-character code, two capital letters, a two-digit number and a lower-case letter, like inf example CM72j

HamGPS

EA4EOZ

Display your current Maidenhead locator with 10 digit precision. It also computes bearing and distance to a set of target locations using locator or latitude / longitude. Useful to align antennas in VHF / UHF / microwave DX activities. No network or fancy maps usage, so it can be used even in remote locations.

The post Top Amateur Radio Websites – Issue 2008 appeared first on The DXZone.

QFH antenna for NOAA Satellites

kmkingsbury

NOAA Satellite Signals With a PVC QFH Antenna and Laptop, this website also link to a github where you can find files and supporting documentation for constructing a QFH Antenna

SDRGadgets

A growing website dedicated to bringing you great accessories to use along with SDR, without breaking the bank. Worldwide shipping and fast dispatch

JSatTrak – Satellite tracking program

Shawn Gano

JSatTrak is a Satellite tracking program written in Java. It allows you to predict the position of any satellite in real time or in the past or future. It uses advanced SGP4/SDP4 algorithms developed by NASA/NORAD or customizable high precision solvers to propagate satellite orbits.

Google Earth Grid Square Locator

OH2ECG

This page host a simple Windows program that will create an overlay for Google Earth that displays the Maidenhead grid. If you only need 4-character locator coverage, you can download an alternative ready-to-use kmz-file.

Folded Dipole Antennas

w8ji

The folded dipole antenna or folded dipole aerial is widely used, not only on its own, but also as the driven element in other antennas like the Yagi antenna and various other types of antenna. Folded Dipole Myths, Bandwidth and details on folded dipoles

Online Morse Code Training

PU5EPX

Learn Morse Online in 40 lessons with this web based morse code learning program, based on the Koch method. Choose the lesson, adjust the wanted parameters, and start the transmission of a set of random characters based on chosen lesson. Recognize the code and verify it at the end of the lesson.

Taming the Quadrifilar Helical Antenna

G2HCG G0HPO

The Quadrifilar Helical antenna provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization.

World Grid Square Map PDF

DXZone

This free PDF file contains two Worldwide grid square maps. The first map displays the fields (first two letters of a maidenhead locator) while the second includes also squares (third and fourth digit) and it can be useful to determine what is your ham radio grid square. PDF file can be enlarged and scaled to A3 and higher dimensions.

RF Exposure Evaluating Your Station

W0STU

How do you practically conduct an RF exposure evaluation of your station? What information do you need and what values must you compute? What are the tools and techniques readily available to the casual operator to ensure compliance with the FCC regulations about RF exposure

Interactive Maidenhead Grid Square Locator Map

Karhu Koti

Amateur Radio Ham Radio Maidenhead Grid Square Locator Map online. This map allows just a point and click to determine dynamically the correct six characters locator. Other functions allow to calculate the distances among two given locators, or coordinates. Hover over map, specify grid, or enter latitude and longitude to show grid and/or calculate distance. Map is powered by Bing Maps.

The post Top Amateur Radio Websites – Issue 2009 appeared first on The DXZone.

Online Morse Code Training

PU5EPX

Taming the Quadrifilar Helical Antenna

G2HCG G0HPO

2E0RDJ – Amateur Radio & Weather Station

Robbie

2E0RDj Amateur Radio Station in Beachley, Nr Chepstow. IO81QP. Projects, Radio & Weather.

NOAA Satellite Reception with QFH Antenna

Lucas Teske

How to receive NOAA weather satellite with a home made QFH Antenna. This project includes some easy and efficient notch filters to suppress noise from FM frequencies

VHF Baluns: Fact and Fancy

GM3SEK

Our ideas about HF baluns have changed dramatically in recent years. The focus today is very much on suppressing unwanted common-mode RF currents, to reduce both the received noise levels and the risks of causing interference on transmit.

2.3GHz to 432MHz RX converter for FT-817

DL5NEG

A very small receiver converter that can be plugged to the backside of the battery powered portable transceiver FT817 from Yaesu. A high performance receiver for 2.3GHz amateur radio signal

100 Watt RF Power Amplifier for 2 GHz

n9zia

Modification to an old cellular phone base station modules, with a fairly reduced output power (10 watts or so), the stock power amplifier modules will cover the 2.3 GHz and 2.4 GHz amateur radio bands.

Emergency Net Log

K4RHB

The ARES Emergency Net Log application is specifically designed for use by ARES Net Control Stations.

137MHz Quadrifilar Antenna

Borre Ludvigsen

This version of the 137MHz quadrifilar antenna for APT reception is an adaptation from Bill Sykes and Bob Cobey Taming the QFH which appeared in the March 1997 RIG magazine. This article contains detailed 3D pictures and models and detailed pictures.

Yaesu FT-857D Select Knob Wobbles – How to replace

Jose Faria

A youtube video instructions on how to replace, the Select knob. Very often this know wobbles after some years of usage and in this video is well documented all passages needed to replace the knob.

The post Top Amateur Radio Websites – Issue 2010 appeared first on The DXZone.

Getting Started with Satellite Communications

DU1AU

An introduction article about how to start with amateur radio satellite communication. In this article, the author includes information on how to home brew your own dual band satellite antenna

Multiband trap dipole

DJ9RB

This antenna is a classical antenna working on 7,10,14,18,50 MHz is implemented with three traps for 30, 17 and 6 meters

FT-857D Serial and Sound Card Interface

Sivan Toledo

A Simple Serial and Sound-Card Interface for the Yaesu FT-857D using an FT232R USB-to-serial bridge chip.

FSK vs AFSK

IK3QAR

In the field of RTTY transmissions with audio boards, you can transmit either in FSK or AFSK mode. Which is better: FSK or AFSK? Advantages and Disadvantages of both methods

How To Build a Quadrifilar Helix Antenna for Weather Satellites

tinhatranch

How to build a QFH (Quadrifilar Helix Antenna) to download images from weather satellites. A complete tutorial on assembling QFH antenna at home with simple and common tools

160m Kite Vertical Antenna

DJ9RB

An essential kite antenna plan for the top band, Antenna has been tested at half wave and quarter wave.

TYT MD-380 Review by Miklor

Miklor

DMR Handheld TDMA Tier I and Tier II VHF or UHF product review with information on accessories

TYT MD-380 firmware modification

KK4VCZ

How to use the hacked firmware on the MD-380. Tools for working with codeplugs and firmware of the Tytera MD380,

Yaesu FT-991 Memory Manager

f6ecn

Free memory management software for the Yaesu FT-991 and FT-991A models. It runs only on Windows 7, 8, 8.1, 10 both 32 and 64 bits, it also permits basic remote control features and allow backup and restore settings and memories. Documentation in mainly in French.

MD-380 Modifications

DL4YHF

Modifications for Retevis RT3 / Tytera MD-380 includes Hardware Modifications, Codeplugs, Software / Firmware Modifications.

The post Top Amateur Radio Websites – Issue 2011 appeared first on The DXZone.

BX-184 Voice Keyer

M1BXF

The BX-184 is a voice keyer developed by Olli DH8BQA designed to fit into the case of a Yaesu MH-31 microphone.

FT991 MARS Mod

FT991

This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 – 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)

Making a Quadri Filar Helix antenna

F4BPP

Lot of pictures, drawings and schematics to build your own QFH Quadri Filar Helix antenna for 137 MHz satellite signals reception

Ecoflex-15 Degradation

M1BXF

This article describes the problem detection on power loss events experienced during repeated usage of the Ecoflex-15 coax cable by members of the G3PYE contest minions and addressed to repeated coiling and uncoiling which has fractured the foil braid in numerous places.

Gigatronix Coax Cables

Gigatronix

Manufacturers of Coaxial Connectors, Push-Pull Latching Connectors, Coaxial Cable, Multicore and Coaxial Cable Assemblies based in UK

SIVA Coax Cables

SIVA

Cable manufacturer based in Italy, produces coax cables fo RF applications including 50 Ohm low loss cables for amateur radio applications.

WoSARS Glasgow

GM4COX

The West of Scotland Amateur Radio Society (Glasgow) established in May 1970

The post Top Amateur Radio Websites – Issue 2012 appeared first on The DXZone.

Baluns and common mode chokes

Dorenberg

Voltage baluns versus Current baluns. When to use them, differences, and typical usage in feeding antennas, or in resolving radio frequency interferences.

CW QSO Example

LidsCW

A sample morse code QSO template. In this page you can find a standard QSO message protocol between two operators.

Small Loop Antenna Calculator by KY8D

KY8D

A free Labview antenna calculator program. This interesting calculator for small loop antennas can be ran on most recent Windows versions using the Labview runtime.

Free ham radio utilities written in LabVIEW

KY8D

Free ham radio utilities written in LabVIEW includes Open Wire Calculator, Dipole Peak/Null Angle Calculator, a Coil-Shortened Antenna Calculator ad interesting Round Coil Inductance Calculator and a Skyloop Antenna Calculator

LinuxLog

Sergey

Simple logger for Linux based ham radio station, can run on most popular linux distributions, offers dx cluster connection, display of QRZ data and pictures, search function, search duplicates, award module.

OneSDR

Nick

OneSDR is an Education website with articles that simplify Software-defined Radio. Our goal is to demystify RF technology

How Wide Area Radio Systems works

Dan Yemiola AI80

This webpage explains how analog wide area two way radio systems were setup by various states before systems like VIPER, PALMETTO 800, or FLEETNET were established.

ARI international DX Contest

ARI DX

Official Rules of the ARI International DX Contest in Italian and English.

The post Top Amateur Radio Websites – Issue 2013 appeared first on The DXZone.

The truth about ferrites

QRM.guru

Articles on the correct placement of ferrite noise suppressors are common, but little has been written about the different options and where to buy them. This page contains an interesting comparison of several ferrite types used to reduce RFI.

Mini Satellite-Antenna Rotator Mk2

sarcnet

Design and construction of a mini satellite-antenna rotator. It used some small DC motors and a novel combination of 3D magnetometers and accelerometers to provide absolute azimuth and elevation feedback.

QRM.guru

QRM.guru has been developed to assist radio hams in dealing with RF noise. This is an educational and reference resource.

Solar Cycle Progression

NOAA

A dynamic graph of current and past solar cycle sunspot number progression and F10.7 cm radio flux progression. In both plots, the black line represents the monthly averaged data and the purple line represents a 13-month weighted, smoothed version of the monthly averaged data.

MiniKits

minikits

Largest range of Electronic Kits and Components for the Radio Experimenter in Australia

Strictly Ham

Strictly Ham has a large retail presence in Australia and welcomes inquiries from New Zealand, the Pacific and Asia. Strictly Ham offers a comprehensive range of high quality Amateur, CB and Marine products, based in Victoria Australia

The post Top Amateur Radio Websites – Issue 2014 appeared first on The DXZone.

Mini Satellite-Antenna Rotator Mk1

sarcnet

This project is a portable device used to automatically point a directional antenna towards an orbiting satellite. It takes all the effort out of little kids holding the antenna and figuring out where to point it. It allows students to talk through Amateur Radio satellites or download weather satellite images.

Building the 6 Meter Moxon Antenna

KB9VBR

A moxon antenna for the 50 MHz build with 19 feet of 14 AWG copper wire, and based on a set of PVC pipes. This is an easy to build project that will give you an efficient directional antenna on 6 meters band with low SWR on more than 1 MHz bandwidth.

Soundcard Levels for Digital Modes

KC2RGW

This article aims to help promote the proper configuration for having a clean signal on the waterfall to avoid interference to other users and also to vastly increase the effectiveness of your signal.

Tino Funkshop

DM3MS

German antenna parts dealer, provides antenna element holders, element clamps for yagi antennas, junction boxes, aluminium plates and rods. Offers also Rope tensioners, plugs and adapters and any additional part you need when you want to make your own antenna.

Digital Mode General Operating Tips

KC2RGW

Start by getting your audio levels sorted out, Having your levels correct is critical to maximum effectiveness in both TX quality and also for being able to decode signals properly. Guide to Filters and other Rig Settings to optimize your output signal

Hands Free – Radcom Labs

The SAFE SPEAK HF3 is the third generation of a unique Hands-Free microphone system for two-way radio communications. The HF3 can be used with almost any radio transceiver and is ideal for permanent installation in a vehicle or temporary use during emergencies or special events.

Collins KWM-2 Modification

WB2ZKW

Modifying the Collins KWM-2 for Serious CW Operation, Make this old SSB workhorse perform like it should on CW.

The post Top Amateur Radio Websites – Issue 2015 appeared first on The DXZone.

TriBand Moxon Antenna for 6m 4m 2m

Bryan Page

A PDF presentation of a home made moxon antenna for 50 MHz 70 MHz and 144 Mhz. The project is mainly out of surplus plastic Plumbing pipes and clips etc, and also details of how the dimensions were calculated.

Antena KIT

Antena Kit

Online shop for amateur radio antenna parts, accessories, holders, clips and insulators for home made antennas. Antena Kit delivers also ham radio transceiver mounts, cables, antenna rotors and other accessories. Based in Brazil

A comparison of 40 meter beam antennas

W1EJM

This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram

6 Meter Quad Turnstile Antenna

high on solder

A quad turnstile consists of two cubical quad loops oriented in a diamond configuration and angled 90 degrees apart from one another with both diamonds sharing the same top and bottom points

6 Meter Band Moxon Style Antenna

K8JHR

Design and build a 6 meter 2-element Moxon antenna mostly from available aluminum tubing and angle stock.

J-Pole Antenna for 50 MHz

DK7ZB

This J-Pole is mounted on a fishing rod. The radiator L1 is an isolated copper-wire with a length of 281,5 cm while the quarter-wave matching sector L2 is made with 450-Ohm-Wireman-cable

VE2DX Electronics

VE2DX

Amateur radio accessories, like the CT-17B ICOM CI-V hubs, IABs ICOM ACC1 Breakout boxes, GS232Dunio GS232A/B arduino based rotor controler, IMK memory keypad for ICOM Radios

J-pole antenna Calculator

basictables

Online calculator for J-Pole antennas. The J-pole antenna consists of a short and a long vertical pole with a feed point near the bottom. The antenna looks like the letter J, hence the name J-pole antenna.

The Ugly MacGyver 6 meter J-pole Antenna

Essentially, a J-pole is a 1/2 wave resonant antenna connected to a quarter wave matching stub. The feedline is connected at a point on the matching stub that is at the feedline’s characteristic impedance. The result is 3/4 of a wavelength on one side and 1/4 wavelength on the other side.

50MHz / 6m J-pole Antenna by VK4ADC

VK4ADC

The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarized antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.

The post Top Amateur Radio Websites – Issue 2016 appeared first on The DXZone.

GPS time sync for modern digital modes

W0JD

As FT8, JT65 and JT9 are a time synchronized protocol, one soon discovers that an accurate PC clock is very important. If your workstation time is off it can cause you to send when no one is listening, or to listen when no one is sending.

PA0RDT Active Antenna

G4AON

Active antennas can be very useful, in particular they can help reduce local electrical noise by allowing the antenna to be installed in a corner of the garden well away from house wiring. The original PA0RDT antenna uses a very small patch for the antenna and relies on the antenna being installed quite high.

IC7300BKT Icom IC-7300 CAT Control

IZ2BKT

Windows PC control program for the Icom IC-7300 transceiver. Power-on and Power-off by software BktNetInterface for JTDX and WSJT-X, audio recording, memory management, cw keyer management, Interface for other software

Grid Calculator

UU0JC

Grid Calculator allows you to calculate either a grid square locator or the latitude and longitude of a location. Grid Calculator can be used to calculate a Great Circle bearing and distance between two stations in statute miles, nautical miles, and kilometers.

Buddipole as a J-Pole for 50 MHz

F5IRO

How to setup and configure the buddipole antenna in the J-Pole mode for the six meter band

Meinberg NTP for Windows

Meinberg

Meinberg NTP software to sync your computer clock. NTP client package with IPv4 IPv6 support for Windows XP and newer.

Master Callsign Database Editor

UU0JC

Master Callsign Database Editor allows to create and modify Super Check Partial database files used by many contesting programs in DTA and SCP formats. The files produced by Master Editor in DTA format can be used with CT, WriteLog, TRlog, SD, and others. The SCP versions of the produced files are for use with Win-Test, N1MM+, and others. Master Editor allows to create a callsign database from a separate log or from a set of logs in the Batch Import mode.

The post Top Amateur Radio Websites – Issue 2017 appeared first on The DXZone.

Multiband J-Pole Antenna by IZ0UPS

iz0ups

A multiband J-Pole antenna project that cover 144,220 and 430 MHz. The articles includes several pictures of this multi-band antenna, including handmade schematics and diagrams, project is mainly in Italian

CatBKT Universal CAT Control

IZ2BKT

Program for the control of the transceiver from your PC. Works on windows and has been tested with different serial and USB interfaces, Based on hamlib libraries , Auto CQ for repetitive calls, Audio Recorder, BktNetInterface for JTDX and WSJT-X

PSKReporter Viewer

VK4ADC

Do you want to see how your FT8 signals are being received in the other parts of the globe?

BktRemote

IZ2BKT

BktRemote Suite is a package of programs that allow you to control the transceiver with different devices via a LAN connection or WiFi. The whole suite is composed by BktRemoteServer and BktRemoteClient

JTSync

UU0JC

JTSync is a simple utility that provides the ability to synchronize your computer clock over a network with world-wide NTP servers. When the Internet connection is not available, JTSync allows you to make time adjustments based on decoded QSOs within the WSJT-X application.

NetTime for Windows

timesynctool

NetTime is a simple and free software to sync your computer clock via internet. Very useful tool for FT8 FT4 operating modes.

BktTimeSync

IZ2BKT

BktTimeSync synchronizes the PC time using an internet time server (NTP server) or a GPS receiver connected to USB, serial port or Bluetooth. Great for use with digital modes like FT8, JT65, JT9, JS8Call and others. For the operation of this program requires an active internet connection or a GPS receiver. This program works on all versions of Windows 32 or 64 bit

Time-Sync for Windows

Speed Soft

Time-Sync is a freeware software to synchronize the time of your system. Time-Sync is installed as a service, the configuration is very easy for each user and can be done in a few steps. Up to five redundant time servers can be configured.

GPS2Time

VK4ADC

A means of sync-ing your computer clock using a GPS Receiver. GPS2Time is another GPS network time synchronization software application for Window 7 and higher. Freeware.

GPS time

COAA

GPSTime is a small freeware applet that corrects your PC clock using GPS. GPSTime reads the serial data coming out of your GPS receiver and decodes the $GPRMC messages to determine the precise UTC time. Works on Windows Vista/7/8/10 with PC with serial ports.

The post Top Amateur Radio Websites – Issue 2018 appeared first on The DXZone.

Low Cost Antenna Traps

VK4ADC

How to home made antenna traps with material you can easily find, and how to properly tune it.

Tuning Antenna Traps

VK4ADC

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.

LogView for WSJT-X

VK4ADC

Log viewer for WSJT-X is an external utility to parse the WSJT-X log and check for duplicate contacts or making additional analysis.

Marine Mobile with Three Antennas

N0LX

Operating marine mobile with antennas for 15-17-20 meters band.

Make a Chirp Programming Cable

KM9G

How to make a custom cable to program your baofeng or kenwood radio. Includes a video on how make a Baofeng Programming Cable for Chirp on Mac OSX

GridLocW Locator converter

VK4ADC

GridLocW is a free Lat/Long to Maidenhead converter for Windows – with optional GPS support, includes the formula to calculate geodesic distance (in m) between two points specified by latitude/longitude.

King of Spain Contest

Official web site of URE contests including the King of Spain HF CW and SSB Contest

The post Top Amateur Radio Websites – Issue 2019 appeared first on The DXZone.

HF Flagpole Antenna

kn9b

Living in a no antenna deed restricted community sounds bad for a HAM, but it means you just need to be more creative. I have found this will not stop your DXCC activities and many of my local HAM club members will agree

The Off-Center-Fed Dipole Antenna

Gary Rondeau

The OCFD Off-Center-Fed Dipole Antenna is an excellent multiband antenna that is relatively simple to construct, yet gets quite decent performance.

HF Field Day Antenna Ideas

vk4adc

Have you ever thought of setting up a portable HF station for an activity like the Field Day ?

A Reversible Beverage at ZL3IX

ZL3IX

How do two-wire reversible direction Beverages work, an excellent document that explains fundamentals of beverage antennas.

Using the RTL-SDR Pan-adapter

Gary Rondeau

How to setup a band-tracking panoramic signal display to work along to your transceiver.

Zadig Windows 10 RTL-SDR Driver

ZADIG

If you want to use an RTL SDR USB dongle with Windows 10 and you experience problems, you may find this free utility very useful

Practical Antenna Modeling with 4NEC2

AF7NX

Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground

The post Top Amateur Radio Websites – Issue 2020 appeared first on The DXZone.

The Single Wire Beverage Antenna

zl1rs

This simple beverage ntenna is easy to make, easy to setup, and it offers great RX performance.

Revisiting the GR5V and ZS6BKW Multi-band Antennas

Gary Rondeau, AF7NX

NEC models are used to explore the GR5V and ZS8BKW optimizations. A third optimization is also rediscovered. The effect of fixed lengths of 75 ohm coax are explored. A link to the NEC model is provided.

2 element Yagi for 20 meter

DK5TX

This antenna was designed for the CQ WW CW 2009 at EA8URL. All elements are made out of fishing rods with an insulated copper cable fixed on the rods by cable ties. Both fishing rods and cable are UV resistant.

Homemade Satellite Yagi

Silvan

In this article author illustrate a homemade yagi antenna for satellite operations. The antenna includes a VHF antenna and an UHF antenna with a band splitter.

A stacked Yagi array for 2 meter

zl1rs

A stacked Yagi array for ZL1SIX 2m WSPR

LFA Yagi Antenna for 6 meter band

n6jv

This antenna is reported as being lower noise than conventional yagis and had a very low SWR for 500 KHz.

Why WWV and WWVH Still Matter

radioworld

Fans of NIST signals cite benefits including understanding the near-Earth environment

BX-184 – An MH-31 microphone integrated voice keyer

dh8bqa

A voice keyer kit available on the marker in two models, BX-184 is the replacement PCB for those who already own an MH-31 microphone. Kit BX-184M includes an MH-31 besides the PCB for those not owning one yet.

YU7EF 6 element 2m Yagi

zl1rs

YU7EF EF0206 2m Band 6 Element Yagi Antenna project, provides 11.8 dbi gain

70MHz Transverter Mk5

M1BXF

The transverter is 28MHz IF and > 50w output (300w peak in later versions) on 70MHz.

The post Top Amateur Radio Websites – Issue 2021 appeared first on The DXZone.

Six meter dipole project

K8JHR

Design and build an 6 m dipole antenna from aluminum, tubing, that resembles the active element of a yagi beam antenna.

Short Monoband Dipole Antennas – KGD Antennas

nonstopsystems

The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.

Home Built six meter J-Pole Antenna

WB0CNK

This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure. This antenna uses flat 450 ohm Window Line for the tuning stub.

Exploring The J-Pole Antenna

AA1ZB

The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.

6 Meter Ladder Line J-Pole Antenna

K4CHE

6 Meter J-Pole from 450 Ohm Ladder Line a quickie project

Royal Communications International, Inc.

Royal Com

Since 1988, Royal Communications International has been supplying communications equipment designed for the military, professional, and amateur market. We specialize in the sale and service of High Frequency, Single Sideband transceivers that are dependable and easy to use.

KG-UV6 Commander

kc8unj

Free programming software for the Wouxun KG-UV6D and KG-UV6X.

The post Top Amateur Radio Websites – Issue 2022 appeared first on The DXZone.

Backyard Multi-Band Wire HF Antennas

W4RNL

My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation

Build a Weatherproof PVC JPole Antenna

K1YPP

After you have build this antenna, you may not need anything else. This article shows how to build a VHF j-pole antenna and how to protect it by inserting it into a PVC tube, the correct way.

WW Locator with Google Maps

IZ3MEZ

WW Locator grid square map and QTH locator made with google maps for ham radio

144 MHz Very Low Noise Preamplifier

HA8ET

An home made low noise preamplifier project for 144 MHz, with detailed circuit diagram. The VLNA-144 preamplifier has been Published on DUBUS 4 2019

Lazy H Array Antenna for 40 meter

NA4L

Make them simple then Make them work. The LAZY H antenna is a general type of antenna that is in the curtain array family. By placing two 1 wavelength dipoles in a plane that is at right angles to the direction of maximum radiation and keeping the proper in-phase current condition to each element, you can achieve a high gain bi-directional antenna.

How to receive NOAA Satellite images with SDR Radio

sashae

Guide for the reception of NOAA satellite images using software defined radio on Windows or MacOS

Icom IC-7300 review by GM4FVM

GM4FVM

Author reviews the physical appearance and ergonomics, performance on common operating modes, data modes and computer operation.

Construction of a J-Pole antenna for 2 meter

VE4WK

If you like building good antennas, this one is for you. The J-pole is a slim, omnidirectional, half-wave antenna fed at the end through a quarter-wave shorted transmission line. Its predecessor is the famous Zepp antenna developed for the Zeppelin airship.

ICOM IC 7300 review by N9EWO

N9EWO

This page includes an interesting and comprehensive review of the ICOM IC-7300 SDR HF / 50 MHz transceiver. The author focuses on many aspects of this transceiver with impressions based on his experience

6 Meter Homemade J-Pole Antenna

KK4BCV

A homemade j-pole antenna for six meters band, designed to work on local repeaters, and working on the 52-53 MHz. Includes a list of needed materials and detailed description on assembling the copper tubes used to build this antenna.

The post Top Amateur Radio Websites – Issue 2023 appeared first on The DXZone.

Notable Patents on Antenna Design

aktuellum

Patents of most popular antenna models including Zeppelin Antenna, Beverage Antenna , Franklin Antenna , Yagi-Uda Antenna , Sterba Antenna , Rhombic Antenna , Turnstile Antenna , Folded Dipole Antenna , Coaxial Antenna , Slot Antenna , Discone Antenna , Quad Antenna Element , Log Periodic Antenna , Swiss Quad Antenna

80m Top Loaded Vertical Antenna

DJ9RB

TLV80 is model of a Top Loaded Vertical Antenna is doing a good job for DX on 80 m band. A version for 80m-30m is provided.

IC-7300 Quick Start Guide

K7HCP

PDF document for IC-7300 beginners. The ICOM IC-7300 is an HF + 6 meter, multi-mode, self-contained Software Defined Radio (SDR) transceiver with knobs, buttons and a touch screen. It also has a real-time spectrum display with pan adapter and water fall displays.

5 Things to Know About Portable Power Stations

Haniya Rae

These pricey battery-powered devices are the only type of generator that can be used indoors safely. The article reviews pro and cons of power stations evaluating runtime, power delivery, power quality, ease of use, and noise.

IC-7300 and WSJT-X Setup

K0PIR

WSJT-X FT8 and the Icom 7300 the Easy Way. If you are looking for an easy way to try out the new WSJT-X FT8 mode, this article is for you

Hamtech

HA8YU

HAM-made engineering products supplies and produces coaxial relays, antenna switches, sequencers, roller inductors, variable capacitors, low noise preamplifiers, RF power rotary switches and coil bodies.

An Audio Selection Panel in the Shack

PE2ER

On this page, you will find one of my designs; An Audio Selection Panel (ASP). The Audio Selection Panel allows you to control 4 Transceivers and hear the audio through the built-in loudspeaker and on an external boomset (combination Microphone/ headset). On or more transceivers can be selected at a time to transmit and/ or receiv

23cm 1296 MHz Transverter

VK4ADC

A homemade 23 cm transverter project with several building steps and pictures

WiFI vSWR Meter

PE2ER

When building antennas for the Wifi band (Like the 8dBi omni), a need for an easy way to check the antennas arose. A Voltage Standing Wave Ratio (VSWR) meter useable at the 2.4GHz band is however, hard to find.

2m Slim-Jim Aerial using Ladder-Line

M0PZT

The Slim-Jim is a bit of a classic – building one is almost certainly a rite of passage and you will be glad that you did: It is easy to make, fairly easy to tune and rolls-up for transportation.

The post Top Amateur Radio Websites – Issue 2024 appeared first on The DXZone.

LAN-IQ SDR

afedri

Stand Alone Software Defined Radio, direct sampling receiver from 30 kHz to 1700.00MHz continuous frequency range, LAN interface for remote access

The Morse Sagas: Cobweb Antennas

Richard Hull M0AUW

Useful tips on building cobweb antennas. Since I’ve done so many posts on the Cobweb antennas I thought it best to separate them on a different page so that potential Cobweb builders can see all the posts together. Hopefully this will make planning and building easier.

Delta Loop for 50 MHz

DL1PZ

A homemade delta loop antenna for six meters band in German

136 kHz QRP Transmitter

GW4ALG

The Marathon is a low power transmitter for 136 kHz

Top 10 Reasons to Take Ham Radio Portable

M0JCQ

Amateur radio portable operation has a lot to offer, even if you are a shack sloth and have an awesome setup.

Interface for SSTV using a Soundcard

WA0TSL

A SSTV interfsace (soundcard) to minimize RF feed back and a soundcard limiter to prevent over driving the soundcard

ChrisTech

Amateur radio and two-way radio communication dealer with online ham radio shop for most popular ham radio brands based in Norway

The post Top Amateur Radio Websites – Issue 2025 appeared first on The DXZone.

The Ramsay Dipole for 40 20 15 meters

M0PZT

A multiband Fan Dipole that works on 40 20 15 meters band, making a folded dipole for 7 MHz band and additional element for the 21 MHz and 14 MHz

Rectangular Loop antenna for 2 meter band

VK1NAM

An interesting and easy to build loop antenna for VHF bands, that present a feedpoint impedance of 50 ohms thus avoiding the need for a 1/4 wave impedance transformer. This antenna is ideal for sota and other portable operations

How to assemble a BNC connector

DJ9RB

How to install a BNC connector on a coaxial cable like the ELSPEC1030AF / HPF195RG and 58C/U cables

Homemade 137 MHz Weather Satellive V-dipole Antenna

lna4all

This is a short version, the final of the article describing how to build the Weather satellite 137 MHz horizontal V-dipole antenna.

Proppy HF Circuit Prediction: Space Weather

James Watson

Current space weather condition gauges, with solar indices taken from the latest WWV report

A Tutorial on the Decibel

W1ICW

This tutorial provides background information on the decibel and instructions for performing calculations involving decibels. This tutorial combines information from several authors, including Bob DeVarney, W1ICW; Walter Bahnzaf, WB1ANE; and Ward Silver, NOAX

3 Elements Yagi LFA for 50 MHz

G0KSC

A short 3 element LFA Yagi for 50MHz with a 1.94M boom. This antenna has been designed in order to minimise the upward and downward lobes typically seen the the EL plane on Yagi antennas.

The post Top Amateur Radio Websites – Issue 2026 appeared first on The DXZone.