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VX-170 at rigpix

Pictures of the restructuring of the ham shack starting from an existing garage. Changes includes isolation of walls and roof and rebuilding of the radio table.

ICNIRPcalc allows you to calculate safety distances for many know amateur radio antennas with respect to ICNIRP limits by DL9KCE

Kits for AM FM radio, UHF control, big LED displays, games, controls, timers, chasers and flashers

An inverted V Dipole antenna for HF bands, working on 10 20 40 and 80 meters band. PDF Presentation

D-STAR repeaters in Hawaii

This antenna is a vertical loop antenna mounted on a 8 meters high grounded mast with an input impedance of 50 Ohms without a matching device

April instrument, manufacturer of programmable microwave signal generators

Windows shareware contest log program for the ARRL 160 meter contest

How to restore conductivity to your rubber membrane buttons by KV5R

The _Alessandro Volta RTTY Contest_ is an annual digital mode competition focusing on Radioteletype (RTTY) operation, challenging participants to make contacts across various HF bands. This event typically occurs in January, drawing a global field of operators aiming to maximize their QSO count and multiplier accumulation. The contest emphasizes accurate exchange of signal reports and serial numbers, with specific rules governing single operator, multi-operator, and SWL categories. Participants utilize software like _N1MM Logger+_ or _WriteLog_ to manage their logs and generate Cabrillo files for submission. Scoring is based on points per QSO, multiplied by unique DXCC entities and Italian provinces worked on each band. The contest encourages both seasoned RTTY contesters and those new to digital modes to engage in competitive HF activity, promoting skill development in digital communication. Final results and logs are typically published on the contest website, showcasing top performers and providing detailed breakdowns of scores.

The purpose of this webpage is to document an attempt at this project starting with the 80m core receiver first and also having the parts on hand for then adding the first dual conversion band (40m)

This group is for support and discussion of the Baofeng UV-3R micro dual band VHF/UHF radio.

Supplier of RF, Microwave, & Wireless passive coaxial components, including Coaxial Attenuators, Adapters, Cables, DC Blocks, Terminations, & Connectors

RF Samplers and demodulators

Radio DX club based in sweden

A free repeater database app for iPhone and iPad includes repeaters from 35 different countries and is available in 5 languages

SM2CEW article on JT65 Deep Search feature

Myths and information about ladder line by KV5R

Software to create virtual com ports when you need to assing different serial ports and you have just one COM port on your PC. Commercial version

2012 Ham Radio HK0NA DX Pedition to Malpelo Island, official site with hk0na online log

10 meter 28.286 mhz 100 milliwatt Beacon

Homebrewing a Lightweight linked dipole HF antenna for portable SOTA operations

There is a specific procedure which must be followed if proper adjustment of a shunt matching coil is to be achieved.

Old Cars and Amateur Radio. This club has a repeater on site of the World Longest Running car cruise. Part of the ARRG.US network

Build this circuit to tailor your microphone response to different band conditions. A project by KG4JJH

A PDF Presetation from the W0DXCC Forum on how to improve the performances of the popular Yaesu FT-2000 transceiver

Utility-Driven Tradeoff Analysis, if you want to geto on the microwave bands , you will have to choose the proper antenna for your operating conditions. How to decide is not always easy, and you may also decide to build your own antenna.

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.

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

HF/50 MHz 100W All Mode Transceiver. The FT-891 provides stable 100 W (25 W AM) high power output

Homebrew, QRP, Beacons & Diplomatic / Spy Radio

A simple DIY signal generator based on NorCal QRP club kit

Relevance of a proper ground systems on short HF vertical antennas, with an analysis on a vertical antenna for 160 meter band

Pro and cons of Digital ATV versus Analogue ATV

Here is a story of installing field expedient PL259 coax connectors on ordinary Cable TV F11 an Rg11 equivalent

On 7.274 MHz since 1955

Elk Antennas to give the Ham log periodic antennas with the best gain, directivity, and front to back ratio possible for the size and price.

Display your current Maidenhead locator with 10 digit precision. It also computes bearing and distance to a set of target locations using locator or latitude / longitude. Useful to align antennas in VHF / UHF / microwave DX activities. No network or fancy maps usage, so it can be used even in remote locations.

A Quick start guide to NPR New Packet Radio on 70 cm band by the NPR author Guillaume F4HDK. This presentation introducte basic concepts of this niew digital protocol, and guide the user to the first modem configuration both of client and master modems. Includes a final recap of commands.

K6BJ UHF MSF5000 Repeater Construction Log

Official aprs.fi iOS app, immediate real-time visibility to APRS traffic near you and around the world.

Official summits on the Air discussion group

Simulation of a top loaded vertical antenna for 1.2 MHz

6 Meter J-Pole from 450 Ohm Ladder Line a quickie project

An overview of digital HF radio operating modes includes a sample audio recording of each digital mode by WB8NUT

W1WD review and reception performance test of the Elecraft K3 transceiver.

Vintage radio colletion