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DX Summit, operated by the OH9W OH2AQ Radio Club, functions as a comprehensive web-based DX cluster, offering real-time and historical DX spots across a broad spectrum of amateur radio frequencies. This service aggregates DX spotting data, enabling users to monitor activity on bands from 1.8 MHz through 47 GHz, including specialized categories like beacons, digital modes, IOTA, QRP, and satellite operations. It serves as a critical tool for DXers and contesters seeking current propagation conditions and station activity. The platform's utility extends to providing daily DX news and a spot search function, allowing hams to research past activity for specific call signs or bands. The inclusion of tutorials and links to related ham radio resources like Radio Arcala further enhances its value. Its long-standing operation, maintained by OH8X, underscores its reliability as a go-to resource for tracking global amateur radio contacts and identifying rare DX.

Basics by From Ian C. Purdie, VK2TIP

This step-by-step tutorial contains everything you need, not only to survive that first contact, but also to learn to enjoy Code and actually do it well. Even if you detested learning it in the first place

Simple eprom programmer for 27Cxx family , used in TNC and G3ruh modem, eprom tutorial, schematics and KissEprom software for windows by iz7ath

RTTY Tutorial by K4WW, foundamentals, FSK and AFSK

Eighteen-part tutorial on packet radio in HTML and ASCII format from Larry Kenney, WB9LOZ

BesserNet Reflectometer is a fun SWR calculator and simulator Java applet

Overview, summary, tutorial about the dipole antenna or dipole aerial that is widely used on its own and as the basis for other antenna designs.

Overview, summary, tutorial about the log periodic antenna or aerial used for wideband RF antenna applications

A short wave regenerative receiver project by Charles Kitchin, N1TEV

W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners

How to cheaply track ships using AIS and a cheap $20 software radio.

Information and tutorials about all aspects of radio and electronics including propagation, ham radio, electronics, radio history, etc

This tutorial provides step-by-step instructions for setting up the ICOM IC-7300 to work with WinLink and WinMor. The process begins with downloading the necessary USB driver from ICOM Japan, followed by configuring the radio settings through the menu. Key settings include selecting the correct output and data modes, as well as ensuring the USB serial function is properly set. Once the radio is connected to the PC via USB, the drivers will install automatically, allowing for seamless communication. After confirming the installation of the USB Audio CODEC and COM port, users are guided to download the RMS Client Software for WinLink. The tutorial emphasizes the importance of understanding the WinLink system and provides links to additional resources for setup. Finally, it details how to configure the WinMor modem settings, ensuring the ICOM IC-7300 is ready for effective digital communication. This guide is essential for operators looking to enhance their digital capabilities using the IC-7300.

Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.

This tutorial will show you how to connect a Morse key to the Raspberry Pi GPIO pins, and how to write code to play tones when you hold the key down. You will also decode the Morse that you're keying so that it comes up on the screen.

A method of installing a PL259 coax connector, a complete tutorial on how to solder Amphenol 83-1SP connectors

Pictures and description for a perfect soldering.A tutorial on soldering technique includes videos.

A tutorial video on manual programming the Wouxun KG-UV8D handheld transceiver

Free basic and advanced system design tutorials for every component and aspect of solar power. Plus system sizing calculators, battery bank calculators and wire size calculators

Relay substitution tutorial, power amplifier tuning and Technical Characteristics

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

Article explaining electronic network of low pass filters

Rtty contesting using writelog for windows. RTTY records and rules, tutorials

Frequencies and location of every meteo radiosonde launching centres in Europe. Equipments, antennas, history, SondeMonitor and BalloonTrack tutorials

Learn quadrature modulation through interactive flash programs. These programs will allow you to learn about quadrature modulation and quadrature demodulation without getting overwhelmed by math.

A source of knowledge for learning about and understanding antennas. The goal is to present a comprehensive tutorial on antennas.

Tutorial about broadband over power line and the new FCC rules restricting how it can be deployed.

Another general tutorial on BPL

A nice tutorial and the basics of the software defined radio, SDR, and links of software defined radios to JTRS, and general SDR receiver technology.

by K6LCS Clint Bradford - Amateur Radio and Commercial Communications. A few current projects, and a little insight into how Clint’s mind works.

Understand how high pass filters are done

This tutorial will get you on the road to running your own live scanner feed on the Internet, be it railroad, fire/ems or law enforcement related.

This tutorial is designed to help the average person get his scanner feed on the net pdf file

Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably

A tutorial on using RF frequency counter, how a digital frequency counter works, includes frequency counter specifications and best practices in setting counter accuracy and resolution

A summary or tutorial about the basics of the spectrum analyzer, what it is and what it is used for.

This series will follow to completion the full Low Noise Microwave Amplifier design, development and prototyping.

Summary, tutorial about the basics of what is a waveguide and the basic waveguide theory.

This tutorial will teach you what you need to know so you can broadcast your live radio feed over the Internet yourself.

In portuguese by PY4ZBZ

Distributed Antenna Systems technology used for gaining better coverage and using a lower power.

Smart antennas or the adaptive antenna array and smart antenna technology used with SDR, cognitive radio, MIMO, and other new technologies.

A summary, overview or tutorial covering the basics of Meteor Scatter or Meteor Burst Communications, a form of radio signal propagation often used at VHF.

The goal of this site is to present a working, practical tutorial on class E transmitters

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

Descriptions, summaries,and tutorials about electronic circuits and electronic circuit design including amplifiers, attenuators, logic, transistor, operational amplifiers and much more

Tutorial about writing a software SSTV modulator/demodulator using slant correction and several improvements. It requires programming language knowledge and programming skills.

A tutorial on how to setup a receiver capable to decode SSTV signals with a small RaspberryPi version 2 and a RTL-SDR dongle. The author explains how to install the needed software to interface the RTL-SDR and a step by step guide to install the QSSTV software used to decode the signals.

Setting up a Live Broadcast on the internet using windows pc and in internet connection