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Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.

The WN-1 is a precision RF Watt, SWR, and DC Meter to digitally monitor your amateur radio and emergency communications stations.

For amateur radio operators seeking to confirm two-way radio contacts, a QSL card serves as a traditional, tangible verification. ON5UR QSL Printing provides a service for designing and printing high-quality, full-color QSL cards, including options for full-color backsides. The service offers various paper weights, such as 250, 280, 300, and 400 grams, allowing hams to select a card stock that meets their preferences for durability and feel. Pricing structures are detailed for different quantities, with 1000 cards starting at 96.00 Euro for 300-gram stock with gloss laminate, inclusive of design costs. The service includes free QSL cards with larger orders, such as 500 free cards with a 2000-card order, or 500 free cards with a 7000-card order. Shipping costs are categorized into six zones, primarily covering Europe, with specific pricing for countries like Belgium (Zone 1) and a request-based system for other regions and export conditions outside Europe. Testimonials from operators like M0URX highlight the design quality and quick turnaround, which are crucial for DXpedition QSL managers needing efficient processing.

Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

A model of a Guanella 1:1 VHF choke balun using a FT140-61 core

A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.

Winding Toroids can be a real hassle for those of use who are left-handed or not so dexterous as we once were.

The 40/60/80 is a portable loop that covers 80 meters with a high degree of compromise

This resource presents over 100 Q-signals, each with its corresponding question and answer format, as standardized by the International Telecommunication Union. The content delineates how these abbreviations can be expanded with additional groups, call signs, place names, or numerical data to provide specific context. It clarifies that a question mark following an abbreviation or its complementary information transforms it into a query. The document highlights that these operating signals, or Op Sigs, are prescribed for international use across all communication types, including military and non-military applications. It references their inclusion in Appendix 9 to the Radio Regulations Annex of the International Telecommunications Convention (Atlantic City) 1947 for QRA to QUZ blocks, and ICAO publications Dec 6100-COM/504/1 for QAA to QNZ blocks. The page specifically marks Q-signals of particular interest to amateur radio operators in red. The utility of Q-signals for concise communication in radiotelegraphy is evident, providing a structured method for conveying complex information efficiently. The resource serves as a practical reference for operators needing to quickly interpret or formulate messages using standardized codes, particularly beneficial for CW operation and international contacts.

An interface for amplifier to TS-850S

EF403 is a 3 element yagi antenna for the 40 meters band with high gain and F/B Ratio

The **Black Cat CW Keyer** is a macOS application designed for amateur radio operators to transmit Morse code directly from their computer. It provides functionality for typing text to be sent, either immediately or buffered, and allows for the creation and transmission of pre-defined messages via single-key shortcuts. This software addresses the need for a flexible and accessible CW keying solution, particularly for Mac users who might find fewer dedicated ham radio applications compared to other operating systems. It integrates basic text-to-CW conversion, offering a straightforward interface for generating Morse code signals. Operators can utilize the Black Cat CW Keyer for various CW activities, including casual QSOs, contesting, or beacon operation. Its ability to buffer text allows for smoother transmission, while the single-key macro feature streamlines repetitive message sending, such as CQ calls or contest exchanges. While specific comparisons to other CW keying software are not detailed, its macOS focus provides a niche solution for Apple users. The program's utility lies in its direct approach to computer-based CW transmission, making it a practical tool for those seeking a dedicated **CW keyer** on the Macintosh platform.

There are many kinds of satellite antennas that will get you on the birds and allow you to have lots of fun

3 to 12 MHz signal generator, simple local signal source

This article proposes a lossy transmission line model of a practical Guanella 1:1 balun that is effective for all frequencies within and immediately adjacent to the pass band

A receiving loop antenna project suitable for 150-430 KHz reception by Gregg van der Sluys

"You tap on computer keyboard in Morse; what you tapped appears as letters on screen."

Band Master is a program for Radio Amateurs that downloads DX spots and displays them in different ways, including a graphical band map. It can be used either as a stand alone application or as part of a logging or contesting software. Price USD 25

This blog is about utility and military monitoring in the HF/VHF/UHF range.

Manufacturer and direct seller of shortwave and ham radio antennas and accessories like TINYTENNA & YO-YO-TENNA

The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's

KN4LF article about a 1/4 wave fan inverted L antenna for 80 and 160 meters band

This program will run all possible combinations of every transmitter against every receiver in its list

US national radio amateur civil emergency service web site

CB Radios And Antennas, Marine Radios, Scanners, Radar Detectors. Online store and repair service

An home made 70 cm colinear antenna at M1KTA blog

Accessories for your hamshack, such as Band Decoders, various types of Antenna Switches, Antenna Stacking devices, special devices designed dedicated for the SO2R operating technique, USB Interfaces, cw keyers and many others

Iambic keyer with simple paddles and simple electronic circuit.

Weatherfax decoding software with modem

An online audio signal generator application capable to reproduce different waveforms with variable frequency range

A free to download and print, paper log sheet for shortwave listerners in PDF format.

Quagi 8el 70cm improved 13.77dBi by IK1HGE

Match & display imped of antennas, can graphically visualize and compare two sets of measured impedances simultaneously.

Amateur radio programs to download, locator , log, etc... for Psion Aprs maps for PC (ui-view)

NU9N recomendations for processed SSB, ESSB, AM Hi-Fi, Mid-Fi, Amateur Radio Audio Setup for transmiters, receivers and Amateur Radio Recording/Playback

Presents _DirLog_, a freeware logging application specifically developed for the 11-meter CB band, catering exclusively to members of the _Alfa Tango Group_. The software facilitates the recording and management of contacts, providing a dedicated tool for CB operators to maintain their station logs. Its development spans from 1997 to 2025, indicating a long-term commitment to its maintenance and evolution by its author, 1AT069 Enio. This specialized logbook offers features tailored for CB operations, allowing users to track their contacts within the 27 MHz band. While primarily focused on CB logging, its structure and functionality could be compared to amateur radio logging software in terms of data entry and retrieval. The exclusivity to Alfa Tango members suggests a community-specific utility, fostering organized record-keeping among its users.

Yaesu FT-857 offers an availability of changing parameters through the hidden menu.

I4FAF etrode Tube Linear Amplifier experience

This article describe a small single wire antenna running on the side of the building allow operations on 80 meters band

Smith is a professional Computer Smith-Chart Tool and S-Parameter Plot for windows, special price for hams and students by Fritz Dellsperger

Import-export telecommunication equipment Cushcraft Antenna Italian dealer, Kenwood Yaesu Icom Dealer

PocketPC freeware that track satellites, and display their position on a map of the world. It also has a display that shows other relevant information useful to Ham Radio operators to allow them to work them.

Rolling your own transformers and chokes. Rewinding salvaged power transformers, considerations and step-by-step guide

Antenna Warehouse provides a range of certified quality wire products for amateur radio and general communication applications. Their inventory includes Francis antennas, known for their robust construction, alongside the versatile Select-A-Tenna series. The company also stocks Solarcon 10/11 meter base antennas, catering to specific band requirements for 27-28 MHz operations, and various Wilson antenna models. Beyond product sales, Antenna Warehouse offers services such as antenna tower installation, repair, and removal. These services support the complete lifecycle of antenna systems, from initial setup to maintenance and decommissioning. The product selection emphasizes components for both fixed station and mobile installations.

An homebrew project for a 3 elements yagi monoband antenna for the 20 meters by 9M2MSO

CB2HAM is a group for licensed radio amateurs focussed on converting quality CB radios over to the Ham bands.

2 Meter Halo Antenna project by Mike Fedler with many detailed pictues and detailes homebrewing instructions so you can build your own

The Windom antenna was widely used in the 1930s and is named after the amateur that wrote a comprehensive article about it

Coral Springs Police and Fire Dispatch Florida

Experience and modifications of ICOM IC-751A