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Various info on KE2UK with links to other radio sites and much much more ...

Home of the Pampanito Amateur Radio Club

An Arduino based remote monitoring system. The Remotino is a remote monitoring system based upon two Arduino Nano units RemotinoSampler and RemotinoViewer that are connected

The Milford Amateur Radio Club, Established in 1961 Milford, Michigan

Managed by k3tkj, offer to ham radio operators free space for web pages and email forwarding.

First released around 1995 and significantly redesigned as QWTelnet 2, this software provides a dedicated interface for monitoring DX-Cluster traffic via Telnet. It integrates a **SOTAwatch parser** with configurable audio alerts, allowing operators to receive notifications for specific search patterns in DX-Cluster remarks without constant screen attention. The application also supports parsing for **GMAwatch (German Mountain Award)**, providing alerts for German Mountain Award activations. QWTelnet 2.4.0, released on 07-APR-2012, runs on Windows (tested on W7) and is distributed as a ZIP file containing the `qwtelnet.exe` executable. It does not require a formal installation process; users simply extract and run the program. The software can display DX information for single bands, integrate with the Reverse Beacon Network, and link to external web resources for DXCC and SOTA information. It also supports local reference files for IOTA, WFF, and RDA awards, which users must source and place in the `qwtelnet/files` directory. For IOTA data, users can convert `IOTA.CSV` from UCX-Log or `DX4WIN_IOTA.TXT` into `iota.csv`. WFF and RDA reference files are directly sourced from their respective websites.

Provides information and resources on Amateur (Ham) Radio from N0UN. Ham Radio Friends, Shacks and Blog by N0UN

2002 CQ WW CW antennas and shack

The Bristol Amateur Radio Club's purpose is to: Facilitate the exchange of information and general cooperation between members to promote amateur radio knowledge, fraternalism and individual operating efficiency

Reviews of the popular portable HF transceiver by Elecraft

The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.

How much better is an N over SO-239 at VHF/UHF, a discussion topic at eham

Turkey Network List, Turkish bulletins and Packet downloads.

NS8O portable generators

EA5FWW Francisco S?nchez Murcia Spain

Spanish ham radio chat

Converting the Jabra A210 Bluetooth Interface for Ham Radio

The RFzero is a multi function signal platform developed for radio amateurs who wants to extend the Arduino skills in combination with RF. The RFzero board is largely compatible with the Arduino Zero and Arduino M0 boards, however, it has been carefully designed for flexible use in RF applications and with attention to the frequency spectrum and stability performance.

This document has been produced by examining the data going into and coming out of the TH-D7 HT from Kenwood.

Arizona contest club for big guns, little pistols and cap guns, from experienced to new contesters.

Providing real-time weather spotter reports for the following counties: Delaware, Fairfield, Fayette, Franklin, Hocking, Licking, Madison, Pickaway, Ross and Union.

CBS is a program that produces statistical data from a Cabrillo file by K5KA and CBSW windows version by N6TV

CRAM - Club Centro Radioaficionados Montevideo, CX1CCC, Montevideo, Uruguay

Much information about 50 Mhz and 2 meters : log , info , links .Also J28VS log.

This simple beverage ntenna is easy to make, easy to setup, and it offers great RX performance.

General information page including contest scores, station pictures

A cavity filter, often a critical component in _duplexer_ designs, functions as a sharply tuned resonant circuit, allowing only specific frequencies to pass while attenuating others. These filters are essential for maintaining signal integrity in environments where multiple transmitters and receivers operate simultaneously on closely spaced frequencies, such as in repeater stations. The article details how these filters, sometimes referred to as _notch filters_, achieve high Q factors, which are crucial for their performance. Understanding the principles of cavity filters is fundamental for any amateur radio operator involved in repeater operation or designing custom RF front-ends. The discussion covers the basic circuitry and operational characteristics that enable these devices to provide significant isolation, often achieving **-80 dB** or more between transmit and receive paths. This level of isolation is vital for preventing receiver desensitization and intermodulation distortion. Properly tuned cavity filters ensure that a repeater can transmit and receive simultaneously on different frequencies without self-interference, a common challenge in VHF/UHF operations.

Moonbounce is the ultimate long path DX. It is exciting and allows you to literally work the world on VHF and UHF. It is not as difficult as you may think. Here is how to get started on this most exciting mode

Ham radio site with personal info, search facilities and some links pages

1500 watts PEP SSB is the power handling capability of the MFJ-989C HF Antenna Tuner, a popular choice among amateur radio operators. Users have shared a wide range of experiences, with some praising its durability and performance over decades of use, while others criticize its build quality and accuracy. The tuner features a built-in dummy load, SWR-wattmeter, and a balun for balanced line feeders, making it versatile for various antenna setups. However, discrepancies in RF power readings and SWR measurements have been noted, with some users finding the dual scale meter to be off by about 20% compared to a Bird wattmeter. Long-term users report that the MFJ-989C performs well with proper antenna setups, but caution against tuning at high power without initial adjustments at lower power levels. Some have experienced issues such as arcing when exceeding 400 watts, while others have had no problems even at higher power levels. The roller inductor and capacitors are functional, though some users have had to perform maintenance like tightening screws or cleaning components to ensure reliable operation. Despite mixed reviews, the MFJ-989C remains in production, suggesting continued demand. It's a tuner that requires careful handling and possibly some DIY fixes to achieve optimal performance.

In portuguese by PY4ZBZ

A CW sidetone bypass for the NESCAF audio filter, a small and low cost circuit that works great.

Low Country Amateur Radio Club Summerville, South Carolina 147.060+ / 147.030

Oost Vlaamse Radio Club Belgium

Homebew a frequency marker by 7N3WVM

BCHF 14.316 MHz Broadcasters HF NET where radio/tv broadcasters-engineers meet 2300 UTC Sunday's

All ham radio inforamtion needed from M?xico.

10 GHz amateur band transverter

Article about a high-gain, narrow-band version feature 7.15 dBd and a F/B 13dB with details on how to setup in array mode

Ullung & Tok-do Island IOTA AS-045

Spectrum manufactures very high-performance, low-cost, GPS-disciplined time and frequency reference standards for industry, scientific, calibration, broadcast and amateur operators.

Measure the AC current flowing through your appliances

supports three repeaters in the Florence SC area. The Club Callsign, W4ULH authorized by the Federal Communications Commission.

The Breeze Shooters is an amateur radio organization based in Western Pennsylvania, established in 1937 by a group of local hams. The club's initial focus was on fostering camaraderie and promoting amateur radio activities among its members. Over the decades, its membership has grown significantly, at one point exceeding 1,800 individuals, making it one of the larger regional ham radio clubs. The organization maintains a casual operational structure, emphasizing member participation in various aspects of the hobby rather than strict formal governance. The club actively supports and organizes events such as the annual Breeze Shooters Hamfest, a significant gathering for the amateur radio community in the region. Members frequently engage in contesting, DXing, and local emergency communications support. The club's history includes a strong tradition of mentoring new hams and providing a platform for experienced operators to share knowledge and resources. Its enduring presence in Western Pennsylvania underscores its role in sustaining local amateur radio interest and activity.

TL5A & TL0R Website wit log and photos

You can find all about awards and dx in argentina

The Denton County Amateur Radio Association is located in Denton, Texas

A NiCAD Battery Charger with Current and Voltage Limiting