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manufacturer of solutions for worldwide wireless broadband communications

W7TDC modification of the Ameritron AL-80A power amplifier

A free (GPL) Linux (Xwindows GUI-based) utility that performs spectral analysis on real-time data from a sound card or other source, and can analyze the spectra of various sound file types. It can also accept data from many kinds of applications in plain-text form by way of the "named pipe" feature of Linux

Windows application that will allow you to perform calculations with the popular Maidenhead Grid Square system. This grid system is used worldwide by amateur radio operators for many aspects of ham radio.

KSM Kenwood Smart Memory is a program to read and update the memory channels of a Kenwood amateur radio. The current supported types are: TS-450S, TS-570D, TS-570S, TS-690S, TS-870S, TS-940S,TS-950S.

The _59+ Log_ software, part of the 59+ collection, functions as a logging tool for Windows operating systems, specifically tested on Windows XP where its logbook feature operates smoothly. This collection also includes _59+ CW_, a module designed for Morse code operations, enabling keying of the COM port for transceiver control or simply listening to CW signals via the speaker. The software package, originally hosted on idealog.net, is now available for download as 59soft14.zip (3.4 MB) from IW5EDI's site. While the logbook application is functional, the _59+ CW_ application may encounter issues on newer Windows versions, as indicated by a failure to start on Windows XP during testing. The analyzer and convert modules within the 59+ suite require registration and do not operate in trial mode. Development and support for this software have been discontinued.

9Y4DD's Dave 14 MHz home-brew MOXON antenna project

Constructing and designing full size, single band stacked yagi antenna arrays

Primarily CB-oriented, but a source for microphones, scanners and other items for Amateurs.

SDR software for SoftRock40 freeware by Alex VE3NEA

Radiomobile is an excellent and very detailed radio path mapping software, vhf uhf propagation predictor. This windows free software is a tool used to predict the performance of a radio system.

"CB books, plans, and kits. Repairs, modifications, 10-Meter conversions, amplifiers, FM, unique high-performance accessories. Publishers of the classic ""Screwdriver Expert's"" Guide book."

This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. It's a good choice for repeater installations and can be top, or side mounted to the tower by WA6SVT

HF amplifiers manufacturer maker of HF-2000 RF power amplifier

An interesting article about homebrewing antenna traps for multiband antennas by VE3GK

A solid state amplifier for HF and 6 meters band by N4IP

A detailed drawing of a VHF UHF Log periodic antenna by VA2PHI

IARU band plan comparagraph

Homebrew a j-pole 2mt and 70 cm antenna project. Make it cheap. This article includes homebrewing instructions, parts lists, tools needed and printable documentation.

Midland Consumer Radio, Inc. is one of the most experienced and respected names in radio equipment. Midland offers the broadest line of CB transceivers in the industry, Amateur radio transceivers, VHF marine transceivers, VHF power amplifiers, and RF equipment for the broadcast industry.

Plans, photos, electrical and mechanical design for this HF Log periodic antenna.

Presindet Electronics produces all mode CB bands transceivers, antennas, and accessories.

Basic and illustrated article on building wire dipole antennas. This page is about "how to build a dipole antenna"

AALog v3.9.0 Build 1288 is a Windows-compatible logging program for amateur radio operators, supporting Windows 2000 through Windows 10. It integrates with CwType, CwGet, TrueTTY, and AAVoice for CW, RTTY, PSK31, and voice operations. The software facilitates online and offline QSO entry, duplicate checking, antenna direction, and distance calculations to DX stations. Key features include managing multiple logs under a single callsign or for different callsigns, and extensive award tracking for DXCC, WAZ, P-75-P, WAS, WAJA, JCC, JCG, WAIP, Russia, RDA, DPF, DDFM, WAU, and WPX, with user-definable award additions. It includes a built-in QSL-manager database, locator grid support, and detailed prefix lists. The program supports export to ADIF and text files, and import from ADIF, LoTW reports, Cabrillo, and AATest formats. External database integration is supported for Buckmaster HamCall CD-ROM, QRZ CD-ROM, RAC CD-ROM (Flying Horse), and Russian Internet Callbook. QSL manager databases like GoList, QSL Routes, and WinQSL are also compatible. The software package for v3.9.0 Build 1288 is 10,630,589 bytes.

The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz. The overall top length needs to be approximately 32.9 Meters

The VTDATA software package is a complete vacuum tube manual on your computer. It has all the information you'd expect in a tube manual. VTDATA's database also includes vacuum tubes of historical interest, such as the early "two digit" types (45, 80, etc.) and hi-fi audio types.

Radio monitoring and analysis tools. Scanning, searching, spectrum analysis and traffic analysis. Amateur, Industry & Government,

Even if using a tuner this multiband antenna will let you operate from 160 to 10 meters. If you could only put up one antenna, this would be it. Project by N0KHQ.

One is an EFHWA for 20-40 meters, and the other is a matching unit for the antenna by n0lx

This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0-7.2MHz) when only restricted space is available

Retrospective of a mark now disappeared. Jumbo, Multimode, Concorde, Puma, Viking. Photographs, diagrams, adjustments etc.

A 14 Mhz version of the vertical moxon antenna homebrewed.

This page discribes microphone wiring connections for most UK and foreign radios. Most U.S. radios are "Code Type 2".

Calculates grid squares from latitudes and longitudes, the reverse, and calculates distances and headings from two sets of lat/long or grid square. Convert Grid Square to Lat Log and vice versa. Freeware for Windows

This page describes the design and construction materials W8WWV used to build a coaxial cable trap. A coaxial cable trap is a parallel resonant circuit that is usually inserted in an antenna element to enable multiband operation.

The _Astron RS35m Power Supply Schematic_ provides a detailed circuit diagram for this popular linear power supply, focusing on the rectifier and pass transistor stages. It presents the AC input and DC output sections, illustrating the component layout and interconnections critical for understanding its operation. The schematic is enhanced with specific annotations derived from the December 2005 QST "Hands-On Radio, Experiment #35 Power Supply Analysis." These notes offer insights into the circuit's functionality and potential analysis points, making the diagram more instructive than a bare schematic. The resource serves as a practical reference for hams interested in the internal workings or maintenance of the _Astron RS35m_ unit. This document specifically highlights the key components responsible for voltage regulation and current delivery.

Concentric Open Loop Antenna Fed Off-Centre similar to the cobwebb antenna but resonating on 20-17-15-10 meters band

Guide to calculate effective gain of antennas

80m to 23cm beam antennas, oscar antennas, and antenna rotors

Live streaming audio of Ontario Police Department. Super clean receive and high quality audio.

Sardine Can Antenna. is a BiQuad or Bi circle - wire length each side (8 x 1/4 waves ) 31 mm

Designed to work with all the major ACARS data capturing programs and enable users to get a complete picture of all the aircraft in there database, where they go and what they have done in the past.

Proposed frequencies for PSK31 QSO

The FT-817 is a small 5W MF/HF/VHF/UHF transceiver with internal batteries. Here is an assortment of technical information K6XX put together about this rig that might interest you.

Multiplatoform freeware DSP software. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage. It can be used as a CW receiver with a small time delay and a fast waterfall graph. A dsp for conventional receiver to imporve signals readability, a spectrum analyzer.

The finest in VHF/UHF antennas for Amateur and Commercial Applications. Antennas and Repeater Controller Accessories includes Rutland Arrays.

IRAQ War Military HF freqs, Aero HF frequencies and Shortwave Broadcast schedules of interest

Listen to the Baltimore County Maryland Police Live Scanner Radio Feed.

Moxon antenna for 50 MHz, The Moxon rectangle is a quite broad-band antenna, but it is not quite broad enough to cover the entire band.

Demonstrates _Freq51_ and _Specgrm2_, two analysis programs from the Biomedical Ultrasonics Laboratory at the University of Michigan, available for DOS or Linux. The _Spectrum Analyser (Freq51)_ provides power spectrum levels as a function of frequency, configurable for absolute values (e.g., dB re 1 volt) with sound card calibration. _Spectrogram (Specgrm2)_ generates a real-time, full-screen spectrogram (sonagram) with various color options. These programs analyze incoming signals in real time, not stored files, and offer extensive settings for sampling rate, FFT points, and averaging time, making them highly versatile for acoustic analysis. The DOS version of _Freq51_ and _Specgrm2_ can operate under Windows 95, requiring users to configure sound card switches via a text file. The resource also briefly mentions other acoustic analysis software like Gianni Pavan's DOS-based bioacoustic tools, _Gram_ by R.S. Horne for Windows, _SASLab_ (Light and Pro versions), _Cool Edit_, and _GoldWave_, providing a comparative overview of available tools for real-time and file-based spectral analysis and waveform manipulation.