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Top Amateur Radio Websites – Issue 1930

October 6, 2019, 11:40 am
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Cost-effective ferrite chokes and baluns
GM3SEK
In this article the author describes some new designs of ferrite loaded chokes for suppressing unwanted common mode currents at HF applied to feed lines like choke baluns, but also in the shack, applied to various coaxial, mains and data cables
Gray line map for Windows
W3WVG
Gray line map is a windows application for your desktop that show the gray line map of the world. Easy resizable and draggable anywhere in your windows desktop updates the gray line status every 10 minutes
End Fed Half-Wave Antennas
An interesting article on end fed half-wave wire antennas with a couple of original experiments. Author illustrate the role of the QRP matchbox, and a 40/20 meter antenna with a center stub making it a large bandwidth antenna for 40 and 20. Includes also an 80/40 end fed with the typical coil to make it available on 80 merts band.
Aerial 51
Aerial-51
Aerial 51 is an antenna manufacturer producing HF Wire antennas. Their antenna product catalog includes portable, OCF wire antennas for HF bands but also QRP transceivers, and accessories for portable operations.Based in Germany
APRS Direct - Realtime APRS tracking data
APRS DIRECT
APRS Direct is a website that brings you global real-time APRS tracking and weather data (including CWOP). Our goal is to bring you a fast and easy-to-use map with the latest APRS activity.
Signal Stuff
Signal Stuff
Amateur radio parts and accessories online shop, born to support hamstudy.org and examtools.org offer super elastic signa stic antennas, sma connectors and other small parts.
Gap Titan DX Assembly Manual by AE2A
AE2A
This manual is an edited version of the GAP supplied document, complete with diagrams, pictures and assembling notes by Mitch Baum AE2A. This is 29 pages document in PDF Format.
An Overview of US Amateur Call Signs - Past and Present
WB4FDT K1CE
QST article from May 1994 about history of call signs from the very beginning to present system. Article explains call sign allocations, call areas, prefixes for novices and prefixes like K WA WB WD, callsigns during and after the world war II and other curiosities on US Call signs.
Ladder Line attenuation
K6MHE
This chart displays the measured attenuation for four 450 Ohm ladder line types
ICOM 756 and 756PRO
W8WWV
Ini this article the author compare the Icom 756 and Icom IC 756 PRO. Comparison is very detailed and includes S Meter Calibration, Microphone Gain, Transverter Jack, the noise blanked, the spectrum analyzer, audio quality, notch filter, compression meter, noise reduction, sensivity and filter settings along to many other features making this article a must for who want to compare this two models

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Top Amateur Radio Websites – Issue 1931

October 13, 2019, 12:37 pm
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The Easy Way Antenna Systems
WB5IIR
This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun
End Fed Antenna with a 1:64 Matching Network
buildthings
In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet
The MonoGap Antenna for 30m Reviewed
NK7Z
A review of the 30 meter MonoGap Antenna. This review covers from the unboxing go the Gap product, the assembly of the elements, the test and tuning phase and a performance report during the years
J-Pole Construction Drawings
K6MHE
Complete plan for making a 2-meter J-Pole antenna. This drawing in PDF File includes a detailed list of the parts needed to assemble the Jpole antenna for 144 MHz.
How to Find Old Amateur Radio Call Signs
W0IS
Many times, persons doing research about their ancestors know that a relative was a ham radio operator, and they are interested in learning the call sign held by that person. Depending on the year when the person was licensed, this can sometimes be a very difficult process.
Fighting Antenna Corrosion - Antenna Maintenance
KC7CJ
How to make proper maintenance of your antenna. Fighting Antenna Corrosion is a QST article published in 1993 that helps on antenna maintenance works
The Classic Beverage Antenna Revisited
HH Beverage
This is a QST Article published in January 1982 by W1FB D. Demaw and HH Beverage and is a complete review of the original article published in 1922, which updates and reivew the beverage antenna theory and developlment, explaining the antenna design of transformers and gives accurate reports on antenna general performance.
How to locate RFI
NK7Z
I have RFI, now what– Locating it. This article is the first of a three parts article, that covers the problem of locating the RFI source. Author make use of an SDR receiver to locate RFI emissions. Ai interesting RFI location process diagrams helps on following the various phases, permitting the discovery of almost 75% of the RFI issues.
FT CALC 1.3 - Ferrite Toroidal Core HF Calculator
VK2WB
This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.
HamVoip - Asterisk Allstar on the Raspberry Pi
HamVoip
Reference site of the HAMVOIP AllstarLink AllstarLink provides hams with a means of connecting radios, repeaters or simplex links, over the internet. It is built upon the asterisk open source PBX and runs on Linux

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Top Amateur Radio Websites – Issue 1932

October 27, 2019, 2:59 pm
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Second floor grounding
w8ji
Solution for stations located at secondo floor or higher. Lead lengths to the grounding system are much too long to provide a low-impedance RF ground.
Field Day Vertical Antenna by KN5L
KN5L
This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna. The design of this Field Day Antenna is not very novel and leverages ideas from Butternut verticals and ARRL publications. The one essential requirement was that the antenna can be raised by just one person. The design of this Field Day Antenna is an above ground mounted ground plane vertical.
Ground Systems as a Factor in Antenna Efficiency
Brown Lewis Epstein
A classic document originally presented in Proceedings of the Institute of Radio Engineers in 1937 and is, still today, the standard referenced by the FCC, text books and many amateur radio publications.
IC-705 English Brochure
ICOM
Download the official IC-705 RF direct sampling VHF, UHF, HF, D-Star all mode 10W QRP portable transceiver. Pre-release information in a PDF file all in English.
W9GF GAP TITAN DX Antenna Installation
W9GF
An unusual Titan DX antenna seutp, done without the standard counterpoise. This document is not an official manual, but rather a personal note to record the antenna setup with the custom wire counterpoise.
Win4IcomSuite ICOM Radio Control Software
va2fsq
The Ultimate Control Software for the IC-7300, IC-7610, IC-7600, IC-7850, IC-7851 and Others is a control software suite that includes additional interesting features such as support for the built in Spectrum Scope, Audio monitors, Shortwave DB, CW Terminal, Clublog Spotting, Memory management, interface to Ham Radio Deluxe Logbook, DM780, n1mm+, log4om, DXLab and other. Runs on Windows OS, commercial licence.
Challenger DX Antenna Review by NK7Z
NK7Z
A review of the GAP Challenger DX Antenna that is not a traditional 1/4 wave vertical, but is a vertical dipole, this gives it several advantages over a standard 1/4 wave vertical, mainly the reduced number of radials, with excellent performances.
Win4YaesuSuite - Yaesu Radio Control
va2fsq
Win4Yaesu Suite is a commercial software for Yaesu FTDX and FT991 Radios. It includes support for SDRPlay and LPPAN panadapters. It interfaces to all third party hardware and software programs including HRDLogbook, DM780, DXLabsSuite, NAP3, N1MM+ and many more.
Balun_cmr Calculate common-mode impedance
VK2WB
This EXCEL Program Worksheet calculates the common-mode impedance of a 1:1 Guanella (current) balun which is placed at the feed point of a balanced antenna system fed via coax.
Online Helical Coil Calculator
deepfriedneon
This online calculator will give as output the Inductance L of a coil, including the total lenght of the wire needed to wound the coil. As input, requires the Diameter, number of turns, wire diameter and turn spacing

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Top Amateur Radio Websites – Issue 1933

November 10, 2019, 12:37 am
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Antuino - Antenna Test Equipment
hfsignals
Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).
WA3TFS Projects, Circuit Boards and Kits for Amateur Radio
WA3TFS
Details on projects by WA3TFS published in QST magazine over the past few years. Includes an online shop with several ham radio kits, circuit boards, simple SDR transceivers
miniVNA PRO Modifications
Serge ON4AA
The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
The Cubical Quad is Beautiful
wa2ooo
An interesting page about Quad antennas. Modelling QUAD antennas, comparing quad antennas to yagi antennas. Information on QUAD Antenna tuning and home brewing with help on calculating dimensions and tuning.
Daki Funkversand
Daniel Kilian
Daki Funkversand is a German based web shop for Amateur- & CB-Radio equipment. Our shop includes products such as radios, antennas, equipment, PMR, LPD & Freenet.
Bergendorffs Radiomuseum
Bergendorffs Radiomuseum Radio Collection, images and technical data on various devices that are in the collections.
TE Systems 6 Meter Amplifier Review
k5nd
TE Systems 0510G 50 MHz meter amplifier set up for 10 watts in and 170 watts out.
A Collins 75A-4 Restoration
VK2FC
This page details the restoration of an early production Collins 75A-4 Amateur Band Receiver that had previously been vandalized.
Quad Antenna On-line Calculator
wa2ooo
Cubical Quad Antenna On-line Calculator helps on defining the size of each element and spreader. Simply give the resonating frequency and it will calculate size of each element.
Icchipword
ICChip
ICChip, as an electronics-guide website, provides you with the industry professional electronic components data sheets, parameters, packaging and brand manufacturer information, as well as product-risk assessment and control, other environmental conflict mineral procurement and reporting solutions. Hope these semiconductors and electronic components data in each document can solve your problems and meet your requirements.

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Top Amateur Radio Websites – Issue 1934

November 24, 2019, 1:00 pm
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Amateur Radio - State of the Hobby - Survery
N8RMA
Annual poll for radio amateurs – the good, the bad, the ugly! This is an annual survey conducted among the online community, and it represents the status of amateur radio. The authors ask to hams several questions, from the most used operating modes, to the typical ham radio lifestyle habits.
DL7AHW Spraycan EH Antennas
DL7AHW
Hairspray-can EH Antennas for shortwave and online programs. Small magnetic (H) antennas (Loops) have a good efficiency for the upper bands (20/15/10 meter band) and also in contrast to E-antenna a defined radiation direction.
SDR Receiver using a Tube
HackADay
The build was an experiment to see if a tube receiver could be stable enough to receive digital shortwave radio broadcasts. The tube acts as both an oscillator and mixer, so the receiver is a type of direct conversion receiver.
KX3 GoBox 2012
oe2atn
This KX3 go-box weights 1,6 kg including the components and the KX3 with its ATU and filter-option installed (no internal batteries) and a light-weight headset
dmrconfig - DMR Radio Programming Utility
KK6ABQ
DMRconfig is a free utility for programming digital radios via USB programming cable. DMRConfig support several DMR transceivers by TYT, Baofeng, Anytone, BTECH, Zastone, Radtel.
WSQCall A Weak Signal QSO mode for LF/MF
zl1bpu
Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar with WSPR and WSJT JT9. Used as a propagation probe or beacon, WSPR allows very weak signals to be detected, frequently as weak as -27dB SNR.
MorseTeacher MorseMachine On-Line
Ward Cunningham
Learn morse code with this online version of the popular morse machine. This version is currently working on Chrome browser only. This program teaches you to receive Morse code. It starts with a few letters and adds more when it sees that you are ready.
CW QSO Trainer
scphillips
This online web application allows you to train the decoding of Morse code by copying random QSO sentences that can be looped or even mixed.
UHF Radio Chat with your Raspberry Pi
MagPi
Send and receive wireless messages adding a small 433MHz radio to your Raspberry Pi, without the need of a WiFi connection and operate remote-control main sockets
FSQCall Fast Simple QSO
zl1bpu
FSQ is a Fast Simple QSO mode designed specifically for HF. It works well under NVIS and sunrise/sunset conditions on the lower bands, and also works well for short skip and grey-line on higher bands and can be used also on VHF FM.

Amateur Radio – State of the Hobby – Survery, DL7AHW Spraycan EH Antennas, SDR Receiver using a Tube, KX3 GoBox 2012, dmrconfig – DMR Radio Programming Utility, WSQCall A Weak Signal QSO mode for LF/MF, MorseTeacher MorseMachine On-Line, CW QSO Trainer, UHF Radio Chat with your Raspberry Pi, FSQCall Fast Simple QSO ,

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Top Amateur Radio Websites – Issue 1935

December 2, 2019, 9:12 am
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Speaker Wire Doublet Antenna
Speaker Wire Doublet Antenna
K4IZ
A portable wire antenna for the HF bands, made with a common speaker wire. In its natural form, the speaker wire acts as parallel feed line coming up to the bottom of the PVC feed point. From there, it’s split into two wires, one heading out each side of the PVC tee.
160m portable vertical antenna
160m portable vertical antenna
VK3YE
The Shoddytenna is a 160 meters band vertical antenna intended for portable use. This antenna takes just 15 minutes to erect on site, can be carried by hand and is ideal for local groundwave work.
RV marine battery as power source
RV marine battery as power source
W1MST
Turning an RV marine battery into a massive 12-volt emergency power source
Decoding Numbers Stations - QST Article
Decoding Numbers Stations – QST Article
Allison McLellan
Exploring these mysterious transmissions and how their strong following has created a niche in the community. Free article in PDF Format from QST November 2019
CW Trainer - Arduino Project
CW Trainer – Arduino Project
N4TL
Hone your Morse code skills with this entry-level project. Article includes the full schematic of the CW Trainer, describes the sketch and how to operate the morse code trainer.
Space weather impacts on Climate
Space weather impacts on Climate
NOAA
About impacts of solar weather changes, including effects of the solar cycle on weather on the Earth. The most important impact the Sun has on Earth is from the brightness or irradiance of the Sun itself.
Guide to DMR Code Plugs
Guide to DMR Code Plugs
Miklor
Basic information on code plugs. What code plugs is, how to set up a code plug, transmit talk groups and configuring zones.
Seiuchy On-line morse code trainer
Seiuchy On-line morse code trainer
hb9fxw
Seiuchy is a web based morse code trainer that can be used even offline once the page is loaded. Trainer can be configured to send call signs only or just part of a standard QSO, and a full QSO too. Answers are then compared and displayed and a score get calculated.
World Wide Radio Operators Foundation
World Wide Radio Operators Foundation
WWROF
Dedicated to improving the skills of amateur radio operators around the world, utilizing education, competition, advancement of technology and scientific research, promoting international friendship and goodwill, and preparing them to better serve society in times of communication need.
JTAlert
JTAlert
VK3AMA
JTAlert provides several audio and Visual alerts for WSJT-X & JTDX software. JTAlert generate audio and visual alerts for several alert conditions, logs automatically to several ham radio log books software like hrd dxkeeper,log4om, interoperates with web services and it supports dxlab suite.

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Top Amateur Radio Websites – Issue 1936

December 10, 2019, 1:14 pm
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Linux and Amateur Radio - Presentation
KD7GR
A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs.
Build A Single-Sideband Transceiver From Scratch
Gregory L. Charvat
How to build a complete Single-Sideband amateur radio transceiver from scratch. Article published on hackaday dot com includes an introduction to radio architectures, ssb receivers and tramsitter
Hermes-Lite Low Cost HF SDR
Hermes-Lite
The Hermes-Lite is a low-cost direct down/up conversion software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project. It is entirely open source and open hardware, including the tools used for design and fabrication files. Over 300 Hermes-Lite 2.0 units have been successfully built.
PolEx Technologies
PolEx Technologies
Makers of the The Polar Explorer transmitter, which operates on 9 HF bands from 160 through 10 meters and is capable of 500 watt peak output power on SSB, CW, AM, FM and RTTY. It is intended to be used in conjunction with a transceiver.
Using AM Broadcast Stations as 160m Beacons
w0btu
AM Broadcast Stations for possible use as 160 Meter Propagation Beacons. When longwave European broadcast stations can be heard, 160 meters may be open to Europe
Optimizing Ground Radials in End-Fed Antennas
w0btu
An interesting article focused on defining the optimal lenght and number of ground radials in vertical, inverted-L, end-fed antennas. This article compares also the radial length vs number of ground radials to power loss in transmitted power.
Icom IC7300 Modifications by M0FOX
M0FOX
Icom IC 7300 noisy Fan replacements with a whisper quiet Noctua NF-A8 / PWM and installing and configuring WSJT-X with IC 7300 correctly
Wi-Fi Rotor Controller
AF6SA
A remote rotor controller, you can use to connect your laptop tablet or smartphone directly to the rotor using it as a Acces point or alternatively it can be connected to existing Wi-Fi network
Advanced Antenna Modeling Book by ON5AU
Marcel De Canck ON5AU
A new book about modeling antennas with EZNEC and in particular in conjunction with the AutoEZ application for a total of 584 pages. The book include more than 3000 accompanied downloadable EZNEC model files

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Top Amateur Radio Websites – Issue 1937

December 15, 2019, 5:53 am
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Using a Baofeng handheld to work Satellites
KM6NHH
How to program Baofeng handheld transceiver with satellite frequencies, and how to get alerts when satellites are visible by using a smartphone app. A beginners guide to work satellites with a common VHF handheld radio.
A Compact 600W Broadband HF Power Amplifier
M0HZH
A 600W 1.8 MHz to 54 MHz power linear amplifier made using rugged MRF300 transistors featuring output power between 580W and 750W depending on band, power supply: 48V, 18A typical, 20A max
Antenna Tuner Basics - In search of the perfect antenna
Chris Warren
An article that explain with simple concepts and basic theory the correct usage of antenna tuners. It covers some aspects of common questions newcomers have on what antenna tuners are for, and what antenna tuners will never do.
Setting up Raspberry Pi for Ham Radio
DL1GKK
An interesting guide to installing software on a Raspberry for amateur radio use. This documentation cover the Raspberry Pi 4 version that whose hadware is powerfull enought to fullfill all requiriements for ham radio programs.
Linux and Amateur Radio - Presentation
KD7GR
A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs.
Build A Single-Sideband Transceiver From Scratch
Gregory L. Charvat
How to build a complete Single-Sideband amateur radio transceiver from scratch. Article published on hackaday dot com includes an introduction to radio architectures, ssb receivers and tramsitter
PolEx Technologies
PolEx Technologies
Makers of the The Polar Explorer transmitter, which operates on 9 HF bands from 160 through 10 meters and is capable of 500 watt peak output power on SSB, CW, AM, FM and RTTY. It is intended to be used in conjunction with a transceiver.
QRP Portable Station Winter Configuration
OH8STN
An article describing equipment needed to make portable operations evenin winter cold times. The article is completed by a nice video describing not only the radio setup but even the tent and power supply equipment
Using AM Broadcast Stations as 160m Beacons
w0btu
AM Broadcast Stations for possible use as 160 Meter Propagation Beacons. When longwave European broadcast stations can be heard, 160 meters may be open to Europe
W8S Swains DX Pedition 2020
W8S Official web site of the Swains Island March 2020. Information about the Team, plans, frequencies and info on the Swains island

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Top Amateur Radio Websites – Issue 1938

December 22, 2019, 4:25 am
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Homebrew 5/8 Wave HF Vertical Antennas
PA3HCM
The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.
Indoor QRP HF Loop Antenna
DL4YHF
A home made magnetic loop for HF Bands. This small and compact loop is designed to support small power transmissions on HF bands, from 7 MHz to 21 MHz
9A5N Solid State CW Paddles
9A5N
21st Century telegraphy paddles, software defined telegraphy paddles by 9A5N. Following global trends in the application of the latest technology, HAM 9a5n has made a significant technological breakthrough in the field of CW paddles
A Elecraft KX2 to Yaesu FT-818 Comparison
W2LJ
A comparison of Elecraft KX2 and Yaesu FT-818
TX7T Log Online
TX7T
Online log for TX7T DX pedition from Marquesas
The UHF Bicycle Antenna
PA3HCM
Homebrewing a UHF antenna to be used on a bicycle. This simple project gives you the right hints on how to build and setup and install a 70cm antenna on a bicycle.
The BikeLoop Antenna for VLF
IW2FER IW2DWN
BIKELOOP is a VLF home made antenna. This antenna is a double magnetic loop composed by two orthogonal loops. This document describe how the prototype was built, the purpose is to give some construction hints to people who wants to try this kind of antenna. Mathematical and electrical details are described as well
SWR and Amateur Radio Antenna Tuners
wa2ooo
Undestanding and measuring SWR, Standing Wave Ratio in antenna feed lines. This article also introduce basic concepts and usage guidelines of amateur radio antenna tuners
TX7T Marquesas Islands DX Pedition
TX7T
TX Marquesas 2019 Nov 6 – 2019 Nov 19, 60-10m; CW SSB FT8 QSL via LoTW official web site
PJ5 St. Eustatius DXpedition by SP6IXF and SP6EQZ
SP6IXF SP6EQZ
All HF Bands CW/SSB/DIGI CQ WW CW anb Online log St. Eustatius DXpedition

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Top Amateur Radio Websites – Issue 1939

December 27, 2019, 1:32 am
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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
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

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Top Amateur Radio Websites – Issue 1940

December 29, 2019, 12:05 pm
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80 Meter Shortened Ground Plain Antenna
DL2KQ
This antenna is a vertical loop antenna mounted on a 8 meters high grounded mast with an input impedance of 50 Ohms without a matching device
LogHX freeware logger software
RX4HX
LogHX is a freeware windows ham radio logger software, designed as complete Ham Radio environment. Radio control interface, online log book interfaces, cluster access, adif and cabrillo exports, antenna rotor control, Digital CW and SSB macros, full QSL management
Antenna Calculation Software
n7yg
The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.
Arduino ACCU Keyer
OZ1JHM
A simple accu keyer made with Arduino that works well with QRQ CW. Free to download arduino sketch and youtube video demonstration.
The Arrow Antenna Portable VHF antenna
KA0VFF
This article is about a 4 element yagi VHF antenna designed to be easy to be assembled and suited for portable operations
Anytone Tech Web Site
Anytone
Amateur radio, commercial, two way handheld and mobile transceiver manufacturer produce VHF UHF analogn and digital DMR two-way radio
Frequency counter project
QRP Labs
This project includes quite a number of useful testing features which were very useful when building other projects. Almost all the components used to construct this frequency counter were scrounged from old circuit boards and junk equipment.
OQRS Hints and Tips Explained
M0URX
Useful hints and tips on using the OQRS service. How to use the log search and check the OQRS Status, the band activity module explaoined, the real time log search feature and the whole OQRS process step by step
One-turn loop inductance Online Calculator
in3otd
The high-frequency inductance of single-turn loops of various shapes made of round wire can be estimated accurately with a simplified formula
BKLog - log book and contest program
A61BK
BKLog is a free windows amateur log book program. Developed in VB.NET, BKLog support several integrations, and provides many features. It can be used as contest log program, allow automatic sending of CW, full transceiver control, DX Cluster access, upload to most popular online Log QSL and QRZ services, like qrz,lotw,clublog,hrdlog.

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The Best Amateur Radio Links of 2019

December 30, 2019, 12:25 pm
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Some of the best amateur radio links we reviewed during the 2019.

    2. A large printable PDF file representing the world time zones. This map gives an overview of current local times around the world. If you ever asked yourself what time zone am i in, find your answer here. (by timezone)
    Time Zone-World Map
    3. In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet (by buildthings)
    End Fed Antenna with a 1:64 Matching Network
    4. Easy to build CW decoder based on DSP Goertzel code. If you want to build a cw decoder without using other active components than an atmel 328, Arduino UNO, then this is sure something for you. (by Hjalmar)
    CW Decoder With Arduino Uno
    5. An home made vertical dipole antenna made with simple material. The antenna has a total length of aproximately 16 feet. In this article appeared on June QST 2019, the author explain how he reached the optimal confirugation changing and adjusting the lower part of the antenna, trimming and spacing correctly the copper wire. PDF File to downloas (by G3PND)
    Vertical Dipole Antenna for 14 MHz by G3PND
    6. 22 Different Wire Antennas for the 160 Meter Band, Random Length Radiator Wire, delta loop, loop antennas, off-centered antennas, sloper, dipoles, Z antenna, Zepp and Clothesline Antennas (by topbandhams)
    22 Antennas for the 160 Meter Band
    7. An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands. (by F. Dorenberg)
    Multi-band End-Fed Antenna
    8. A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs. (by KD7GR)
    Linux and Amateur Radio - Presentation
    9. 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. (by DK7IH)
    Micro24 Cigarette Pack SSB QRP Transceiver for 20m
    10. How to Increase your CW speed article by George Allison, K1IG as published on QST (by K1IG)
    Increase Your CW Speed with Wordsworth
    11. A 600W 1.8 MHz to 54 MHz power linear amplifier made using rugged MRF300 transistors featuring output power between 580W and 750W depending on band, power supply: 48V, 18A typical, 20A max (by M0HZH)
    A Compact 600W Broadband HF Power Amplifier
    12. An air-wound balun made with coaxial cable can not become saturated because no powder iron or ferrite core is present. In this article author explains and compare coax baluns to ferrite baluns with comparison tables and detailed pictures (by PA0FRI)
    How to build a Coax Balun 1:4 and 1:1
    13. A family of small size QRP SSB transceivers for the 15 MHz. Includes a cigarette pocket size QRP transceiver and a larger shirt-pocket transceiver. (by DK7IH)
    A Micro QRP Transceiver Project
    14. An article describing equipment needed to make portable operations evenin winter cold times. The article is completed by a nice video describing not only the radio setup but even the tent and power supply equipment (by OH8STN)
    QRP Portable Station Winter Configuration
    15. An article that explain with simple concepts and basic theory the correct usage of antenna tuners. It covers some aspects of common questions newcomers have on what antenna tuners are for, and what antenna tuners will never do. (by Chris Warren)
    Antenna Tuner Basics - In search of the perfect antenna
    16. In this article the author describes some new designs of ferrite loaded chokes for suppressing unwanted common mode currents at HF applied to feed lines like choke baluns, but also in the shack, applied to various coaxial, mains and data cables (by GM3SEK)
    Cost-effective ferrite chokes and baluns
    17. The Hermes-Lite is a low-cost direct down/up conversion software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project. It is entirely open source and open hardware, including the tools used for design and fabrication files. Over 300 Hermes-Lite 2.0 units have been successfully built. (by Hermes-Lite)
    Hermes-Lite Low Cost HF SDR
    18. How to program Baofeng handheld transceiver with satellite frequencies, and how to get alerts when satellites are visible by using a smartphone app. A beginners guide to work satellites with a common VHF handheld radio. (by KM6NHH)
    Using a Baofeng handheld to work Satellites
    19. A simplified Guide to the FT8. Dxpedition mode. By Stefano IK2HKT – Rel. 2.0.0 - January 2019. This document explains how to configure WSJT to work on F/H mode DXPedtions, how to operate and make a call to a dxpedition calling CQ in FT8 Fox Mode. (by IK2HKT)
    A simplified guide to FT8 DXPedition mode
    20. A handy piece of test equipment useful for HF bands, can absorb a 200W modulated carrier for almost 2 minutes. It is housed in a tin and part filled with dry sand that helps in power dissipation (by VK2KVV)
    HF-MT Dummy Load by VK2KVV
    21. A project of a small antenna, just 50 cm for the 7 MHz band. An EH Antenna plan for the 40 meters band (by F5SWN)
    EH antenna for 40 Meter
    22. Excel spreadsheet that help calculating dimensions of a high efficiency magnetic loop antenna for HF bands. Giving in input the loop perimeter, loop diameter and loop conductor will calculate electric characteristics, bandwidth, and efficiency (by F5RDS)
    Magnetic Loop Antenna Calculator Spreadsheet
    23. The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX. (by PA3HCM)
    Homebrew 5/8 Wave HF Vertical Antennas
    24. An home made doblet antenna made with two Slinkys that are aproximately five meters in length connected with a twin-feed connected to a balanced ATU (by M0SPN)
    Multi Band Slinky Doublet Antenna
    25. The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters. Ray built hundreds two meter quads in single and paired configurations as well as his famous mobile radio direction finding quad. (by N6JSX)
    Designing VHF/UHF Quad Antenna
    26. A Tower Project at WOIVJ. A pictorial story of the erection of a 40 foot, self-supporting, fold-over tower. (by W0IVJ)
    Home Brew Fold Over Tower
    27. Homemade moxon antenna for the 40 meter band. This article is not very descriptive but includes some very detailed images (by TA7OM)
    Moxon Antenna for 7 MHz
    28. A video about secret listeners ham radio voluntary interceptors during ww2 an extract from The Secret Wireless War DVD
    Secret listeners during WW2
    29. Getting started on RTTY contesting. A PDF by ED Muns, presented at CTU conterst university, about amateur radio RTTY Contesting (by W0YK)
    RTTY Contesting, A to Z
    30. Azimuthal map with DX spot reporting updated online taking source from DX Cluster spot or Skimmer (by ha8tks)
    Online Live Azimuthal map
    31. An interesting guide to installing software on a Raspberry for amateur radio use. This documentation cover the Raspberry Pi 4 version that whose hadware is powerfull enought to fullfill all requiriements for ham radio programs. (by DL1GKK)
    Setting up Raspberry Pi for Ham Radio

The list represented in this article is just a selection of best amateur radio links we have reviewed and added to our links directory.

The post The Best Amateur Radio Links of 2019 appeared first on The DXZone.

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Top Amateur Radio Websites – Issue 2001

January 26, 2020, 10:57 am
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LogHX freeware logger software
RX4HX
LogHX is a freeware windows ham radio logger software, designed as complete Ham Radio environment. Radio control interface, online log book interfaces, cluster access, adif and cabrillo exports, antenna rotor control, Digital CW and SSB macros, full QSL management
Baofeng Mic Pin Out and Programming Cable Schematics
Baofeng
Speaker Microphone Pin Out, Dual PTT Switching,Programming Cables, SMA Antenna Connection, Extended Antenna Threads for Baofeng UV 3, UV 5 Series handheld transceivers
OQRS Hints and Tips Explained
M0URX
Useful hints and tips on using the OQRS service. How to use the log search and check the OQRS Status, the band activity module explaoined, the real time log search feature and the whole OQRS process step by step
BKLog - log book and contest program
A61BK
BKLog is a free windows amateur log book program. Developed in VB.NET, BKLog support several integrations, and provides many features. It can be used as contest log program, allow automatic sending of CW, full transceiver control, DX Cluster access, upload to most popular online Log QSL and QRZ services, like qrz,lotw,clublog,hrdlog.
AirHamLog - Online Amateur Radio Logbook
JJ1SXC
AirHamLog is a modern logging software for amateur ham radio operators. The software works inside your browser, making it possible for you to use with any device connected to the internet. AirHamLog currently supports Windows, MacOS, Linux, iOS, and Android that works with modern browsers. AirHamLog has ability to export QSL cards as PDF files. All of your log data is stored on the cloud. You can start using AirHamLog for free today
Red Pitaya
Red Pitaya
Established in 2013 produce kits and solutions to build your own SDR transceivers, Skimmer servers and wspr devices for the amateur radio market, and digital test equipment, and learning tools for the academic and research markets.
E44RU Palestine 2020
E44RU
E44RU DX Pedition to Palestine by Russian Robinson Club 5-13 January 2020

The post Top Amateur Radio Websites – Issue 2001 appeared first on The DXZone.

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Top Amateur Radio Websites – Issue 2002

February 2, 2020, 1:20 pm
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Grounding HF Transceiver using Coax Cable
9M2SX
Improper grounding or earthing system can cause several unwanted RF interferences (RFI) to television sets, broadcast receivers, hi-fi sets and telephone sets. In this Article the author explain how to setup a proper radio shack grounding using coaxial cable and ceramic disc capacitor
Build a twin-lead Lindenblad Antenna for 70cm and 2m
W7HD
This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands
From Windom Antenna to Multiband OCFD
ON4AA
The Windom antenna, one of the oldest antennas developed for amateur use, has had a complicated history, one as interesting as the theory of the antenna itself.
The Yagi Antenna - Presentation
N5ZGT
A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
Interactive Ham Radio Locator Map
K7FRY
This grid locator map uses Google map apis to find your QTH locator by simply clicking on the map. You can either enter your QTH locator and find the calculated distance and bearing between your QTH and another grid square.
XieGu Tech
XieGu
XieGu Tech manufactures quality amateur radio transceivers and amplifiers designed by BG8HT. Xiegu focus is portable and self contained transceivers perfect for your next SOTA, hiking trip or travel experience.
Amateur Radio Microwave - Introduction
W6BY
Introdcution to Amateur Radio Microwave. A 21 page presentation of ham radio microwaves concepts for beginners. Frequencies, modes and activities. How to get started, what equipment is needed and some pictures of ham radio microwave station setups
The Lindenblad Antenna - Presentation
W7HD
This is a presentation used at OVARC on the LindenBlad antenna construction. The presentation cover several topics about this antenna, from the basic antenna design, to the guide on how to contruct a custom lindenblad antenna for the 2 meters band and and 70 centimenters band.
Retevis
Retevis
Manufacturer of two way radios based in Shenzhen China. Retevis produce commercial, personal and amateur radio handheld and mobile transceivers, either for analog and digital modes. Retevis produce also two-way radio accessories and repeaters.
How to program Motorola APX P25
N2ICV
How to program Motorola APX Series P25 Two-Way Radios for use with the OpenSPOT 2. This document covers some important steps to be followed to upload the correct codeplug to mMtorola P25 radios

The post Top Amateur Radio Websites – Issue 2002 appeared first on The DXZone.

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Top Amateur Radio Websites – Issue 2003

February 9, 2020, 12:23 pm
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Raspberry Pi and Automatic NOAA Satellite Reception
instructables
How to receive automatically NOAA wather satellite images with a Raspberry Pi and a RTL SDR. This project requires a Raspberry Pi 3 Model B a common NooElec SDR Dongle and a QFH Antenna in the attic. Article explains how to setup and configure software but no instructions on antenna.
HamClock - Ham Radio Desk Clock
WB0OEW
Keep track of much more than the time with this Wi-Fi enabled device. HamClock is a desk clock that could show accurate time, geography, time zone, solar activ- ity, sunrise and sunset times, Maiden- head locators, beam heading,
6m and 4m Vertical Dipole Antenna
PE1CUL
The two dipoles are parallel with a distance of 12 cm and are also fed in parallel. The total length of the 4 m dipole is 208 cm and the 6 m dipole is 280 cm.
Weak Signals - Reduce volume to reduce noise
VE7SL
This article discusses how volume reduction can help in the reception of weak signals by reducing the noise level. It is commonly known that reducing the volume also reduces the background noise, and especially in the reception of weak digital signals it can be beneficial
2m Quad Turnstile Antenna
The loops are made of 10 mm round aluminum tube. No bending pliers was used to gently bend 90 degrees to obtain a square with 53 cm inner sides. Each loop has an impedance of approximately 100 Ohm. To connect both radiators in phase, a quarter wave long feeder of 100 Ohm is required.
70 MHz 4m Slim Jin Antenna with Ladder Line
pa0fri
An experimental slim jim antenna for 70MHz band made with a wireman slotted line.
Milcom Monitoring Post
Teak Publishing
A blog dedicated to military communications shortwave intercepts, sponsored by the Teak Publishing

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Top Amateur Radio Websites – Issue 2004

February 22, 2020, 1:32 am
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Experimental HF 6-band SSB transceiver
DK7IH
An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.
The half-wave dipole, your first antenna
RSGB
Construction tips of a basic wire antenna, the half wave dipole. Inverted V dipoles and effects of inverted v on radiation pattern.
A Three-Band One-Tube Novice Transmitter
KC9KEP
A homebrew radio transmitter project, based and inspired by the original 30 Watts input on 80 50 and 15 meters band transmitter by W11CP
The Spectrum Monitor
The Spectrum Monitor
The Spectrum Monitor, amateur, shortwave AM FM TV Scanning Satellite magazine, is edited and published by Ken Reitz KS4ZR, former managing editor, features editor, columnist and feature writer for Monitoring Times.
Optocoupled Transceiver-PC Audio Isolator project
IK5NAX
An optocoupled audio interface between PC and Transceiver for digital modes. The article includes full schematic of complete board and build instructions.
TI9A Isla del Coco Chatham Bay DX-pedition
TI9A
February 2, – February 8, 2020 by Dima RA9USU, Jorge TI2JV, Andy UA3AB and Mats RM2D Chatham Bay, Isla del Coco, Costa Rica EJ65LN
V31YN
V31YN
2020 Jan 6 – 2020 Feb 29 By DJ4KW as V31YN and DK9GG as V31GW; 160-10m; CW FT8 SSB; see Web for full QSL and operational details QSL via LoTW.

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Top Amateur Radio Websites – Issue 2005

March 1, 2020, 12:49 am
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Semi-automatic antenna tuner project
DK7IH
Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
Zeus Radio - Software Defined Radio
HFR Electronics
Zeus Radio program is designed specifically for the ZS-1 transceiver and supports all the basic functions (RIT, XIT, SPLIT, Noise Reduction, Auto Notch Filter, etc.) in order to work in the broadcast brought only pleasure. Zeus Radio works also with Hermes, Anan, Afedri, Red Pitaya, HiQSDR, Odyssey, Extio, RTL-SDR, Peaberry, Winradio, SDR-IQ, Afedri
Decoding APRS via WebSDR
g0wfv
How-to decode and Display APRS Packets from WebSDR Audio using linux computer
Data Sound Samples
G4WNC
This page contains links to a variety of data signals that have been specially recorded. Each file contains a standard test message (the quick brown fox jumped over the lazy dog) repeated twice. The files can help you learn the characteristic sound of various data modes but they can also be used to make sure your decoder is working.
Icom IC-R7100 Clicking Noise
EA4EOZ
How to solve the problems with the ICOM IC R7100 receiver that every time the squelch opens or closes, it produces a clicking noise.
Anritsu MS2711A Repair
EA4EOZ
Repairing an Anritsu MS2711A handheld spectrum analyzer
5H4WZ DXpedition Pemba isl.
5H4WZ
Members of the Low Bands Contest Club (OM7M) will take part in an DX-pedition to Pemba Island AF-063 from 6.2 – 18.2. 2020. They will be on air from 160-10m CW, SSB, RTTY & FT8. Also participation in the ARRL DX CW and CQ WPX RTTY contests. The licence is issued and callsign will be 5H4WZ.

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MSI.SDR Panadapter SDR Receiver

March 1, 2020, 10:57 am
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The MSi.SDR is a wide spectrum SDR receiver by BA5SBA that is available on the market since some months now and can be purchased at 40 Euros / 50 USD from major online stores, including Aliexpress and Amazon.

The MSi.SDR can be easily used as Panadapter extracting the IF form most popular and modern amateur radio transceivers in the market.

MSI.SDR is a powerful broadband full-featured SDR receiver, covers frequencies from 10KHz to 2GHz. Just connecting a PC and an antenna, the functions of the receiver can be provided. Compatible with all SDRPlay RSP1 software. Compatible with popular SDR software platforms, you can monitor up to 10MHz of spectrum simultaneously. Enjoy all modes of operation. Small size and easy to carry. Frequency from LF long wave to HF short wave VHF UHF microwave contains all amateur radio bands.

Detail of the small MSi-SDR
MSi.SDR Rear

The MSI.SDR is basically a SDR Reciver clone of the most popular SDRPlay RSP1 but without AM Brodcast and FM Broadcast filters.


 
Main Feature:

1. Exquisite and sturdy aluminum casing
2. Frequency continuous coverage from 10kHz to 2GHz
3. 12-bit ADC chip (not the kind of RTL chip)
4. Built-in front end filter
5. Built-in TCXO (temperature-compensated crystal oscillator) 0.5ppm
6. Spectrum bandwidth of up to 10Mhz
7. Higher sensitivity and good selectivity
8. More often low background noise
9. Simple USB interface (micor jack)
10. SMA antenna connector
11. USB power supply No separate power supply
12. Compatible with all SDRPlay RSP1 software.
13. Weight :25g
 
Features:

MSI.SDR can receive HF short wave directly without the need of upconverter.
Covers all amateur bands, aeronautical bands LF to HF, VHF, UHF
It is possible to see the entire amateur band spectrum at the same time.
Support mainstream SDR software, (including HDSDR, SDRConsole, SDR#, SDRuno, etc.)
Available ExtIO-based plugins

MSI.SDR Size
MSI-SDR Dimensions


MSi-SDR Software Operations

OS Compatibility Support for multi-system platforms, including Windows, Linux, Mac, Android, Raspbian

Operation: It can receive HF short wave directly without the need of up converter. MSI.SDR covers all amateur bands, aeronautical bands LF to HF, VHF, UHF It is possible to see the entire amateur band spectrum at the same time. Support mainstream SDR software (including HDSDR, SDR Console, SDR#, SDR uno, etc.) Available ExtIO-based plugins


The post MSI.SDR Panadapter SDR Receiver appeared first on The DXZone.

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Top Amateur Radio Websites – Issue 2006

March 8, 2020, 1:50 am
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How to stack dissimilar yagi antennas
WA5VJB
In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas
Top Loaded Vertical Antenna for 80 Meters Band
DJ9RB
Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
Modifications to the Diamond V2000 and similar antennas
EA4EOZ
This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
TyQSL - Online Logbook
TyQSL
TyQSL is a modern Logbook by Hams, for Hams. A Place for other hams to take a look at your QSO statistics as well as search for QSOs in your Logbook that you made public. Just click onto your name in the Menu Bar when you are logged in to get to your public profile. Soma features includes Shows the users Valid Callsigns Look at QSO Statistics, Search Public Logbooks, Filters are available to find QSOs fast Just share the Link on Social Media, QRZ, or Similar with other
HackRF
HackRF
open source hardware for software-defined radio. HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation. 1 MHz to 6 GHz operating frequency
DVMEGA
DVMEGA
The Swiss army knife for Digital Voice, the DVMEGA radio is basically a complete D-Star and DMR compatible hotspot
bladeRF
Nuand
Nuand bladeRF 2.0 Software Defined Radio (SDR) 47MHz to 6GHz, 2x2MIMO, 61.44MHz sampling
E44CC Online Log
E44CC
Online Log of the E44CC dx pedition to palestine 2020

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Top Amateur Radio Websites – Issue 2007

March 23, 2020, 11:56 pm
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Home Made Artificial Ground Tuner
PA0Q
Home made Artificial Ground. This article contains a schematics of a custom artificial ground device that can be used to ground your station equipment if you live in an higher floor and cannot effort a proper dedicated ground connection. This Artificial Ground has been designed by Colyn Baillie-Searle GD4EIRP
ZR6KMD 20m Field Dipole
ZR6KMD
A simple drawing schematic of a portable field dipole for 14 MHz with dimensions in meters and instruction for setting up the antenna and to store the radial for easy transportation
ZS6KMD 20-40m Multiband Dipole
ZS6KMD
The dipole shown in this document is installed in an inverted Vee configuration, with two leg elements on each side held parallel to each other by 21cm spacers. The upper leg is for 40m and the lower leg for 20m. The spacers are made of 7mm plastic garden hose support for garden sprayers cut to 21cm.
70cm Mini-Transverter Project
VK4ADC
The project in this article illustrates how to do this in a simple and low cost way so that you can easily access the microwave bands using the existing HF or HF/VHF transceiver as IF.
Measuring SWR at 1296 MHz
VK4ADC
Have you been looking for an easy way to measure power or SWR at 1296 MHz? One thing is certain, it is not easy – simply because the normal range of SWR meters that most of us have is not up to 1300 MHz.
Car Power Adapter to Anderson PowerPole
NJ2X
A useful and simple project to convert an unneeded car power cable to an Anderson PowerPole adapter.
TU5PCT Ivory Coast 2020
TU5PCT
February 21th March 1st 2020 DX Pedition to Ivory Coast

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