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The idea makes use of a very simple direct conversion receiver on the band of interest.

The Megacycles combine the hobbies of amateur radio and bicycling. This group is not a club as there are no officers, dues or by-laws.

Sharing the stories of Pacific radio, an on-line archive and resource. Includes searchable databases, articles, images, store, newsletter, research, advocacy, publishing, radio heritage documentary production and more. Free membership worldwide.

Sonogram is a highly flexible audio spectrum analyzer for the analysis of sound, music and speech signals in the frequency-domain using different algorithms.

PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

PDF file of the Yaesu FT-991 manual

Instructions on how programming a regency scanner model R1060

Personal Blog devoted to ham radio topics, amateur radio issues, social impact of ham radio and opinion.

The 80 metre fox-or/test transmitter is a small low power transmitter which is designed to be used as an alignment aid for running up 80 metre foxhunt or ARDF receivers. It is also usable as a micro transmitter for fox-or-ing events.

Report on tests done on VHF Radios to understand which are best suited for 144 MHz operation in large signal environments like VHF contests

Monitoring real-time amateur radio activity is essential for DXers and contesters seeking rare contacts or tracking propagation. This online service aggregates DX spots from various **DX Cluster** networks, presenting them visually on a world map. Users can observe new spots as they appear, facilitating quick identification of active stations and potential openings. The platform offers filtering capabilities, allowing operators to narrow down displayed spots by specific bands such as 160m, 80m, 40m, 20m, 10m, and even VHF/UHF segments like 70cm and 23cm. Further refinement is possible by selecting the source continent of the spotter or the continent of the DX station, which assists in strategic operating. The service also includes a "Hot Now" list, highlighting currently active stations with recent spots. This dynamic display supports informed decision-making for pursuing **DX contacts** across different bands and geographical regions.

Israel Amateur Radio Club

link7 is a Windows 9X program to download/upload data from/to the Kenwood TH-D7.

Yugoslavia's only external broadcast shortwave station; it broadcasts to all world regions in eleven languages.

This page describes how to set up RaspBerry Pi Linux system with already configured AX.25 softwares on SD or micro SD cards

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

The current, the voltage, the impedance, the bandwidth, the polarization, and how the earth influences the famous radiation pattern.

A virtual museum of Collins Radios

About DRM, the DRM standard, emission types, upfrading your old HF RX to DRM

This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.

Introduction digital atv in the 70 cm band

Here a comparison of Kenwood TS-590S used with MC-60A and the oringina dynamic microphone

A review of some portable antennas for SOTA operations, including linked dipoles, end-fed, verticals

Brief overview of PSK31 and basic operating techniques.

Online in RealAudio and Windows Media formats, with multiple language shortwave schedules, and instructions for receiving Australian satellite radio and TV (AusTV).

TwinsLAN is Minnesota's only amateur radio club devoted to digital communications

A full superhetrodyne SSB fox hunting receiver kit

FT-847 PA Mod, there is a better way, by G0MGX

A well done introduction to Packet Radio by WB9LOZ

This site is dedicated to those who enjoy building radios and other electronic devices using parts and techniques from bygone eras.

OM3CPH Universal HAM radio/generator DDS Unit with AD9850 or AD9851

The Buddipole Deluxe, a portable HF/VHF antenna system, receives a practical assessment from IW5EDI after a month of field use. The author, constrained by antenna restrictions, highlights the system's crucial role in enabling portable operations, even managing sporadic digital activity from a balcony. Direct comparisons to a fixed 3-band dipole reveal surprisingly comparable signal reports on 15, 17, and 20 meters, underscoring the Buddipole's effectiveness in real-world scenarios. Tuning the Buddipole proves straightforward on bands down to 20 meters, though the review notes significant challenges with SWR on lower bands like 40 meters, where achieving better than 3:1 SWR was problematic. Observations also include SWR variations with dipole rotation and mast height, suggesting environmental factors play a role. The overall manufacturing quality of the antenna and its accessories, including the tripod and carry bag, is deemed good, despite a minor issue with a pole connector. Looking ahead, the author plans to construct a homemade Buddipole version, possibly optimized for the 30-meter band, specifically for PSK31 operations from an apartment. This personal project reflects a common amateur radio practice of adapting commercial designs for specific needs, further extending the utility of portable antenna concepts.

To promote Amateur Radio in the Gadsden - Etowah County area and to provide public service to our community in the form of emergency communications.

A spectrum analyzer based on ATMega8 microcontroller and a CYWM6935 within a Nokia mobile phone case.

Using NEC4WIN for Jpole antenna modeling

eham users reviews of the Kenwood TS-570S(G) series

Two Way Radio Batteries, Rechargeable Batteries, Radio Batteries, Battery Chargers, factory direct with lowest prices available!

A few pictures of an homebrew magnetic loop RTX antenna project, working from 30 to 12 meters with excellent results

Ham Radio store with on-line shop in Bari Italy

New award Diploma Monumentos Historicos de Espa?a (DMHE), with info in historic monuments activated.

Connecting rhythm and language with Morse Code by Phil and David Tulga

Home for dutch speaking radioamateurs, wordwide. We also provide information about our hobby in english and other languages. Hamradio guide for visitor to Holland

Q15X25 is a packet modem with a KISS/AX.25 interface designed for HF transmission of AX.25 packets and TCP/IP using Automatic Repeat reQuest (ARQ) and forward error correction (FEC).

The A QRP Club is a small group of Amateur Radio enthusiasts who enjoy building, operating and (mostly) talking about Low Power radio communications, equipment and systems.

Kenwood TS 990S, Military Auxiliary Radio System modification

General Motors Amateur Radio Club - WW8GM EchoLink Repeater in SE Michigan

Design, build and supply Military Diesel Operated Tactical generator sets, diesel generator sets, custom generators, auxiliary power units, portable power generators and tactical quiet generators used by the U.S. Navy and Air Force.

Qsl card printing, filling, distribution. complete qsl service from Bulgaria