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VR-5000 Signal Capture and Analysis Software - Give your VR-5000 a new face. Controls your VR-5000, Log stations, Manage frequency lists, Record Audio and more. This program utilizes a more visual approach to simplify your radio listening.

Antenna manufactuer, Panel antennas, sector panel antennas, high gain for ISM, MMDS, PCS, GSM, CDMA, TDMA, 400MHz, 900MHz,1.9GHz, 2.4GHz, 2.7GHz, 3.5GHz,5.8GHz. Broadband wireless applications for ISP,ASP.

Yaesu FT-857 features and specifications

A 2 meter antenna made of copper tubes, offering circular polarization

An easy method for erecting antenna masts using readily available material

This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands

This program is for editing Memory Channels APRS, SKY COMMAND II and various settings on the kenwood amateur radio TH-D7A(G)/D7A(G2.0)/D7E(G2.0) A similar version exist for TH-D7 generation 1.

interface box for Icom rigs that includes a band output port and a CI-V­to­computer serial interface

Custom iambic and single leveler paddles

Complex CAD and Optimization Software for Waveguide, Coax, Combline and Antenna components design and antenna modelling

A site for Amateur Radio beginners and enthusiasts in Malaysia

Russian callsign prefix series: RAA-RZZ, UAA-UIZ, includs Amateur callsign system in Russia

Draws a world map centered on your QTH. Type in a DX station's call sign to get the beam aim azimuth and distance to the station.

Manufacturer of telecom structures and related accessories

IC-8000 specifications and picture

The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency.

A 144/440 dual band open stub J-Pole Antenna project by NT1K

G0KYA's Amateur Radio Blog, make a 2m Slim Jim antenna out of 300 Ohm ribbon cable.

Mapping software which links a Garmin GPS receiver to your Macintosh. Includes Maidenhead grid squares and beam-pointing maps.

On Track On Line provides information about Rail Travel and all facets of the hobbies of railroading and trains.

Electronic components dealer, semiconductors, switches, leds, motors, solar energy, ferrites, toroids, capacitors, batteries, jacks and plugs, microphones, meters, power supplies, speakers, transformers, wire and more

The QLF filter is a microprocessor based interface designed to go between a standard Morse code key and a radio transmitter

Learn the Morse Code. Learn from random text or simulated QSO (contact) sources. Create character sequences that you find difficult. Compare your results with what the program sent and view error statistics. Take simulated tests. Sound card not essential. Evaluation version not time limited.

Powerful antenna modeling tool using NEC 2 computing engine. Nec2 specifically provide users, either those experienced with the Nec2 processes, or for those who are neophytes but want to model their own antennas. Nec2Go uses a simplified process for defining the antenna structure and then providing view of the structure, plots (2D and 3D) and other significant data that is pertinent to the design. This simplified process uses an edit file with equations for all definitions.

A simple 40 meter CW transmitter, it sports full break-in operation and 250 mW of output power.

A sketch to read the input from the microphone and translate the dots and dashes into ASCII characters.

Outdoor equipment and electronics - handheld, base, mobile VHF, UHF and CB radios. Uniden emergency scanners. FRS and now GMRS 2-way radios.

We sell antique radio tubes and antique tube radios We have over a thousand different radio tubes in stock. We also have a large stock of globe tubes.

Videos by W7NWH including D-STAR system demos

This HALO design is not ground dependent and can be mounted atop a section of PVC.

Big DUtch blog post about yaesu VX-8R include pictures and link to VX-8R manual

Enabling IC 706 for 4 meter band modification in italian.

Closer pictures of Yaesu VX-150

A 10 meters band Slim Jim antenna project, made with a 450 Ohm slotted ribbon cable and secured on a 8 m fishing pole, by Steve G0KYA

Olivia MFSK digital communications are becoming popular in amateur radio because Olivia is one of the most robust methods of text keyboarding, that can perform superbly for long distance communications. Olivia frequencies, format and software

Online calculators for toroid coil, air-core coil inductance, XL, XC, and more.

W6/PA0ZN CATV tuner based Spectrum Analyzer Building Project

Lighting protection document by Glen E. Zook

VOAProp shows you typical propagation for a given hour of the day during a given month. The propagation is shown as expected signal strengths to be received from different parts of the world, plotted on a world map. Windows freeware by G4ILO

List of latest published Weather Fax world wide schedule including frequencies and modes.

HT Programming for the Absolute Beginner

Stacking 2 Meter Halo Antennas by Mike Fedler N6TWW

Manufacturers of two-way radios (transceiver) in China.

An easy mod to make the 1st IF of the Icom IC-7600 accessible and connect to a cheap RTL SDR dongle by VE4NSA

Examines the historical landscape of "boat anchor" amateur radio equipment manufacturers, focusing on the technical innovations and market dynamics that shaped the industry from the pre-WWII era through the transition to SSB. It details the origins and key product lines of prominent U.S. companies like _Collins Radio Company_, _Central Electronics_, and _Barker & Williamson_, highlighting their contributions to receiver and transmitter design. The resource contrasts early AM technology with the advent of SSB, explaining the circuit changes required in receivers and the complete rethinking needed for transmitters. It discusses the impact of military contracts on company survival and the eventual shift towards smaller, self-contained transceivers. Specific examples, such as the _Collins R-390/URR_ receiver and the _Central Electronics 100V/200V_ broadband transmitters, illustrate the engineering prowess and design philosophies of the era, offering insights into their operational characteristics and enduring appeal among collectors.

An Arduino project to make it work as a KISS TNC

Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.

An impedance transformer (9:1) to feed a high impedance long wire (~450 ohm), down to a 50 ohm unbalanced coaxial input.

Tuning the Solarcon Antron A-99 antenna for 20 meters band

A moxon antenna project for 70 cm band, test and results of this popular antenna model applies to UHF bands.