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Article on propagation basics. The ground wave used for radio communications signal propagation on the long, and medium wave bands for local radio communications -
A collection of frequently asked questions on ground systems -
A short introduction to amateur radio portable operations bu VKFAQ. -
All the essentials about the Dip Meter or Grid Dip Oscillator used for many RF measurements including detecting resonance, locating RF emissions, and making many RF measurements. -
The _Touch CPO_ circuit offers a unique method for Morse Code practice, eliminating the need for a physical key. It leverages the versatile IC555 timer, configured as an astable multivibrator, to generate an audio tone. Users can adjust the tone's frequency by manipulating a 100 K variable resistor connected between pins 7 and 6 of the IC555, providing flexibility in the practice experience. Volume control is achieved via a 10 K variable resistor, while a 1 K Ohms preset at pin 4 of the IC555 allows for fine-tuning the touch plate's sensitivity. The design connects the touch plate to the base of a BC147B transistor, a configuration noted for its flexibility regarding the length of wire between the transistor and the touch plate. The author's prototype successfully used a 9 cm wire with a 3 x 6 cm aluminum plate. This project also suggests an alternative application as a touch-operated doorbell, demonstrating the circuit's adaptability. The design emphasizes simplicity and ease of construction, making it accessible for hams interested in DIY electronics. -
overview of radio signals and radiowave propagation and how different areas of the atmosphere affect radio communications. -
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Descriptions, summaries,and tutorials about electronic circuits and electronic circuit design including amplifiers, attenuators, logic, transistor, operational amplifiers and much more -
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New PA stage for good old Atlas 350XL HF transceiver -
Article about the microstrip antenna, which is also commonly referred to as the patch antenna. -
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Presents the Carolina DX Association's (CDXA) _Contest Corner_, a dedicated resource for amateur radio contesting activities. It features a curated contest calendar, linking to external resources such as the _WA7BNM Contest Calendar_ and the _ARRL Contest Calendar_, providing a broad overview of upcoming events. The page also details CDXA's internal contest programs, including the "CDXA DX King" and "CDXA DX King Classic" for 2026, with specific links for members to submit their scores. Furthermore, the resource integrates with _3830Scores.com_, encouraging CDXA members to submit their contest results and select the club affiliation for tracking. It provides a direct link to view aggregated scores from participating CDXA members, fostering club competition and recognition. The "CDXA Periodic Table of Contest - 2026" is also mentioned, indicating a structured approach to contest planning for the year. -
A description and build-log of a cheap telescoping mast made from PVC pipe, string, and some misc mounting hardware. It is useful if you are going somewhere that doesn't have any trees nearby to hang something on. -
The I2YSB DXpedition Team presents a collection of videos documenting their past DXpedition activities. These visual records offer insights into the operational aspects, equipment deployed, and environmental conditions encountered during various DXpedition events. The resource also contains a specific announcement regarding the cancellation of the planned Ghana AF-084 DXpedition, originally scheduled for April. It further details the refund process for sponsors who had contributed donations for the cancelled operation. The content serves as an archive of DXpedition experiences, showcasing the efforts involved in activating rare or challenging entities. It provides a historical perspective on the team's operations and logistical considerations. The site also functions as a communication channel for important updates concerning future or cancelled DXpedition plans, directly addressing the amateur radio community interested in their activities. -
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Article on how to use logic analyzers for testing complex logic-digital circuits -
Introduction to troposcatter or tropospheric scatter propagation using the troposphere -
Official page of the IARU High Speed Telegraphy Championships -
Online HB9CV antenna calculator, accept as input the desired resonating frequency and provides dimensions for spacing and length of each element, including boom and radiator diameter. -
A complete list of resources for the Kenwood TS-850 mantained by TK5EP -
AmTOR may be considered as the next development from RTTY. AmTOR was introduced to overcome the problems with RTTY. As a result of its performance, it has become popular on the HF bands because it gives more reliable communication, especially when interference is present. It achieves this by using a coding system that allows errors to be detected and corrected. -
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An introduction to develpment of morse keys in radiotelegraphy history -
How to limit unwanted harmonics from your raspberry Pi radio transmitter by introducing filters. -
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Licence types in Australia and How to get a licence. -
Introduction to packet radio and answers to common questions about this digital mode and about services you can use by VKFAQ -
Visual Wais is a free HAM (Amateur Radio) software to manage WAIS (Worked All Italian Squares) award. With few clicks, it allows the complete award management, from QSO insertion to endorsement requests. -
An overview about the UHF connectors often referred to as the PL259 plug and SO239 socket used for many RF applications. Limitations, history and soldering properly UHF Connectors -
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DX Pediton to South Georgia VP8SGI Log Online IOTA AN-007 -
Volunteer Amateur Radio operator organization providing emergency communications services to charitable events and in large scale disasters. -
A resource page for Kendoowd TS-850 HF transceiver -
This page introduces the world IARU Grid Locator system, and discusses how to find out what your own Grid Locator is. -
Harleys, Astronomy, HAM Radio, and other stuff -
The Pro 95 is a dual trunking handheld scanner designed by GRE and sold by Radio Shack -
Software running on the Raspberry PI, Control up to 8 arduino rotators modules, Azimuth maps, Cluster support, Band decoder, contest Web Log, Webcam with RaspiCam support -
Setting up a Live Broadcast on the internet using windows pc and in internet connection -
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Do you want to see how your FT8 signals are being received in the other parts of the globe? -
Article descrive the different types including coax and open-wire feeder and waveguide. -
An extensive document about Morse Code in amateur radio edited by W5ALT -
Key details about the superhet or superheterodyne radio reeiver: basic overview; how it works; applications; design notes, all you need to know. -
A comparison of commercial 4m verticals by by Ian Hogan G6TGO -
A Web forum dedicated to HF underground and in particular to Shortwave Pirate Radio Forums and Spy Numbers listenings
