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.
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.
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
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.
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.
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.
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 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.
The WSJT Development Group recently announced the release of WSJT-X Version 2.1.2.
WSJT-X 2.1.2 is a bug fix only release that solve some issues reported on previous versions
WSJT-X 2.1.2 is a bug fix only release which fixes a major regression
in the Hamlib package bundled with WSJT-X v2.1.1.
Release: WSJT-X 2.1.1
November 25, 2019
---------------------
WSJT-X 2.1.1 is a bug fix only release addressing regressions in the
prior v2.1.0 release.
- Document rules for the UDP message protocol.
- Fix bug that could cause display of a blank Settings window.
- Fix message parsing to properly handle 4-character directed CQs
- Fix a potential crash in the interface to Omni-Rig.
- Improve handling of unexpected rig off line status changes from
Omni-Rig.
- Add an option to highlight unworked 2-character grid fields rather
than 4-character grid squares.
- Fix bug that caused unwanted disabling of "Enable Tx" in Fox mode.
- Log duplicate contacts in FT8 DXpedition Fox mode.
- Regenerate the GFSK Tx waveform if Tx audio frequency is changed.
- Fix the behavior of double-clicking on a decoded message with first
callsign displayed as an unresolved hash code <...>.
- Fix a problem with determining "worked before" status after a band
change.
- Updates to the WSJT-X 2.1 User Guide.
- Fix a production issue with the macOS tool chain that generated
broken executables.
WSJT-X is licensed under the terms of Version 3 of the GNU General Public License (GPL). Development of this software is a cooperative project to which many amateur radio operators have contributed. If you use our code, please have the courtesy to let us know about it. If you find bugs or make improvements to the code, please report them to us in a timely fashion.
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.
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.
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.
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 is a free utility for programming digital radios via USB programming cable. DMRConfig support several DMR transceivers by TYT, Baofeng, Anytone, BTECH, Zastone, Radtel.
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.
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.
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
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 ,
CQ WW DX CW: November 23-24 Starts 00:00:00 UTC Saturday Ends 23:59:59 UTC Sunday
The CQ WW is the largest Amateur Radio competition in the world. Over 35,000 participants take to the airwaves on the last weekend of October with the goal of making as many contacts with as many different DXCC entities and CQ Zones as possible.
GOAL: For amateurs around the world to contact as many other amateurs in as many CQ zones and countries as possible.
BANDS: Six bands only: 1.8, 3.5, 7, 14, 21 and 28 MHz. Observance of established band plans is strongly encouraged.
EXCHANGE: RST report plus CQ Zone number of the station location (e.g., 599 05).
Read all rules in several languages on official CQ World Wide DX Contest Page
TR4W (TR for Windows) is a free and open source log book program for operating in ham radio contests. Based on source code of the TR LOG MS-DOS program, kindly provided by Larry Tyree, N6TR, supports 155 contests and SO2R
LM is a program to edit contest logs afterwards, a so-called contest post processor. With help of LM you can convert row data to many different file formats. Allow a quick input interface, and contest score for several contest. Can import & export a batch of logs and to create result lists.
N1MM Logger+ is one of the most popular contest logging programs for Windows and it is the evolution of the N1MM classic. N1MM Logger plus is fully free to download and to use software featuring automatic CW generation, rotator and radio control, suport for So2R, cluster support, winkeyer interface, import export cabrillo and adif formats and many more features. Download N1MM from the official web site with latest callsign files and updated.
SkookumLogger is a free contest logging program for Mac OS X 10.7 or later, supporting CW and SSB events on the six HF contest bands plus 6m, 4m, 2m, and 70cm
SunSDR2 DX is a direct sampling 100 watt SDR transceiver developed for the serious DX’er and contest operator.
The SunSDR2 DX transceiver based on the well-known SunSDR2 PRO transceiver with several hardware improvements.
Like its predecessor, the SunSDR2 DX covers all HF bands plus 50 MHz and 144 MHz VHF bands with a general coverage receiver. It combines high performance and 100 watt transmit power on HF Bands in a compact size with a LAN interface for maximum flexibility.
Remote control over DSL or mobile 3G or 4G connections provide a full SDR experience using the Expert Remote System.
Hardware improvements in comparison to SunSDR2 PRO:
Improved supply system, which leads to less heating and less power consumption
HPF for VHF (100 MHz) to eliminate strong out-of-band stations coming from HF
LPF for HF (70 MHz) to eliminate strong out-of-band stations coming from VHF
New VHF LNA chip – PGA103+
Newhigh-performance built-in stereo audio codec 24 bit with 114 dB dynamic range
Sturdy DIP-type ExtCtrl connector
New connectors: external tuner control, external fan control, GND
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).
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
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.
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 is a German based web shop for Amateur- & CB-Radio equipment. Our shop includes products such as radios, antennas, equipment, PMR, LPD & Freenet.
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.
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.
Portable specialist SOTABEAMS has launched a new carbon-fibre portable telescopic mast. The Carbon-6 has an extended length of 6 metres (19.6 ft) but weights just 300 grams (10.6 ounces).
Its packed length is only 43 cm (17 inches) making it a mast that can be taken pretty much anywhere.
The Carbon-6 has been designed for light-duty operations and is best suited for supporting the centre of end-fed wire antenna in inverted vee fashion.
It is likely that this will be a popular choice for the portable operator who undertakes more “extreme” forms of travel or just wants to travel light!
We are pleased to announce a new member of the SDRplay family – the RSPdx
The RSPdx is a replacement for the highly successful RSP2 and RSP2pro SDR receivers, which have been extensively redesigned to provide enhanced performance with additional and improved pre-selection filters, improved intermodulation performance, the addition of a user selectable DAB notch filter and more software selectable attenuation steps . The RSPdx , when used in conjunction with SDRplay’s own SDRuno software, introduces a special HDR (High Dynamic Range) mode for reception within selected bands below 2MHz. HDR mode delivers improved intermodulation performance and fewer spurious responses for those challenging bands.
The RSP2 and RSP2pro design is over 3 years old now, and so the RSPdx has taken advantage of a lot of the learning from our work on the newer RSP1A and RSPduo designs as well as ongoing feedback from customers.
These three videos give more information as follows:
This introductory Video shows the features and demonstrated the RSPdx in action over a wide range of frequencies:
This unboxing video talks some more about what you can expect to see and some of the key benefits:
Over on the Hamguides YouTube channel, Mike, KD2KOG introduces the RSPdx and looks forward to receiving feedback on ideas on where you’d like more video guides
In the coming weeks, links to more demos and articles relating the RSPdx will be added to our apps and support catalogue: https://www.sdrplay.com/apps-catalogue/
The pricing for the RSPdx will be similar to the RSP2pro (approximately $199 USD or £159 GBP excluding taxes) and the current schedule is for units to be available to buy from around 22nd November – wither direct from this website (click on purchase) or from our authorised channel partners and resellers: https://www.sdrplay.com/distributors/
About SDR Play RSPdx
The SDRplay RSPdx is a complete redesign of the popular RSP2 and RSP2pro multi-antenna receiver. It’s a wideband fullfeatured 14-bit SDR which covers the entire RF spectrum from 1kHz to 2GHz.
Combined with the power of readily available SDR receiver software (including ‘SDRuno’ supplied by SDRplay) you can monitor up to 10MHz spectrum at a time.
The RSPdx provides three software selectable antenna inputs, and an external clock input. All it needs is a computer and an antenna to provide excellent communications receiver functionality. A documented API allows developers to create new demodulators or applications around the platform.
KEY BENEFITS & FEATURES
Covers all frequencies from 1kHz through VLF, LF, MW, HF, VHF, UHF and L-band to 2GHz, with no gaps
Receive, monitor and record up to 10MHz of spectrum at a time
Performance below 2MHz substantially enhanced – improved dynamic range and selectivity
Software selectable choice of 3 antenna ports
Enhanced ability to cope with extremely strong signals
External clock input for synchronisation purposes, or connection to GPS reference clock for extra frequency accuracy
Excellent dynamic range for challenging reception conditions
Free use of windows-based SDRuno software which provides an ever-increasing feature-set
Strong and growing software support network
Calibrated S meter/ RF power and SNR measurement with SDRuno (including datalogging to .CSV file capability)
Documented API provided to allow demodulator or application development on multiple platforms
SDRplay limited is a UK company and consists of a small group of engineers with strong connections to the UK Wireless semiconductor industry. SDRplay announced its first product, the RSP1 in August 2014
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.
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.
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.
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.
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.
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.
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.
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.
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
The ADALM-PLUTO active learning module (PlutoSDR) is an easy to use tool marketed by Analog Devices Inc. that can be used to approach the Software Defined Radio (SDR) technology or to learn the basic concepts and topics of electronic engineering or again to explore advanced topics in the field of radio frequency communications, both in “instructor” and “self-learning” mode.
PlutoSDR allows students to better understand the real RF world around them and is applicable to all students, at all levels, in all areas. Learning in a practical way with PlutoSDR will guarantee a solid base particularly suitable for students who follow a scientific, technological or engineering study path.
The PlutoSDR active learning module is a tool that “amplifies” the relationship between theory and practical activity in the field of radiofrequency.
PlutoSDR provides a personal portable laboratory that, when used with a host, can increase classroom learning. A variety of software packages like MATLAB or Simulink provide an innovative graphical user interface (GUI), which allows intuitive use and minimizes the learning curve, allowing students to learn faster, work smarter and explore more!
Robin Getz looks at various RF problems (third harmonics of mixers, RF pollution, required RF filters), and how new innovated tools, and open source software can help measure and mitigate these issues.
The ADALM-PLUTO active learning module is a learning tool for everyone.
Based on the Analog Devices AD9363, it offers a reception channel and a transmission channel that can be managed in full duplex, able to generate or measure analog RF signals from 325 to 3800 MHz, up to 61.44 MSPS, with a width 20 MHz band. PlutoSDR is completely autonomous, truly pocket-sized (it fits perfectly in the shirt pocket) and is entirely powered by USB with the default firmware. With support for OS X ™, Windows ™ and Linux ™, it enables the exploration and understanding of RF systems regardless of where the user is or when.
In practice, adding RX filters, an antenna and a pair of VHF-UHF-microwave amplifiers with PlutoSDR it is possible to build a 144-430-1200-2400 MHz quad-band, both for SSB use and for digital transmissions, using the PC as control console SDR. With the necessary adjustments it also accepts full-duplex for satellite use.
The cost is just over 100 euros, truly within the reach of every experimenter.
Features
Portable self-contained RF learning module
Cost-effective experimentation platform
Based on Analog Devices AD9363 Highly Integrated RF Agile Transceiver and Xilinx® Zynq Z-7010 FPGA
RF coverage from 325 MHz to 3.8 GHz
Up to 20 MHz of instantaneous bandwidth
Flexible rate, 12-bit ADC and DAC
One transmitter and one receiver, half or full duplex
MATLAB® Simulink® support
GNU Radio sink and source blocks
Libiio, a C, C++, C#, and Python API
USB 2.0 Interface
High quality plastic enclosure
PlutoSDR Host Interface
The PlutoSDR supports the following USB device classes:
X Mass storage (for easy firmware updates)
X Serial (for interacting with the Linux kernel/userspace on PlutoSDR)
X Networking/RNDIS (for loading and controlling custom ARM® applications)
X Libiio (bulk USB for SDR data transfer and control)
X Device firmware upgrade (for backup firmware upgrades)
Open Source
The PlutoSDR open source firmware is built from Das U-Boot, the Linux kernel, and Buildroot. As part of the class materials, the firmware is able to be run, copied, distributed, studied, changed, and improved with Vivado® HL WebPACKTM Edition (license free). Supporting USB 2.0 On-the-Go, the PlutoSDR can attach to a variety of USB peripherals (wired networking, Wi-Fi dongles, audio, etc.), which extends functionality. All documentation is open and available at wiki.analog.com/plutosdr.
SDR PLUTO
Connecting RF Theory with RF Practice
The PlutoSDR works as a portable lab that, when used with a host, can
augment classroom learning. MATLAB® and Simulink® are two of the
many software packages supported by PlutoSDR, and it provides an
intuitive graphical user interface (GUI) so students can learn faster, work
smarter, and explore more.
Made for Teachers, Students, and Self-Learners
The PlutoSDR features independent receive and transmit channels that can
be operated in full duplex. The active learning module can generate or acquire
RF analog signals from 325 MHz to 3800 MHz at up to 61.44 megasamples
per second (MSPS). Small enough to fit in a shirt pocket, the PlutoSDR
is completely self-contained and entirely USB powered with the default
firmware. Because PlutoSDR is enabled by libiio drivers, it supports OS X®,
Windows®, and Linux®, which allows students to learn and explore on a
variety of devices.
The Adalm Pluto by Analog Devices is a Portable self-contained RF learning module, based on Analog Devices AD9363--Highly Integrated RF Agile Transceiver and Xilinx® Zynq Z-7010 FPGA. Includes one transmitter and one receiver, half or full duplex and cover 325 MHz to 3.8 GHz
With dozens of available online tutorials for SDR-based projects, PlutoSDR boasts labs and teaching material covering topics such as ADS-B aircraft position, receiving NOAA and Meteor-M2 weather satellite imagery, GSM analysis, listening to TETRA signals, pager decoding, and many more!
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