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Wantagh amateur radio club, wantagh, long island, new york. Our club is one of the oldest amateur radio clubs, if not the oldest, on Long Island.

A Horn antenna by WE3HHT

Yaesu FT-100D Active Interface for the Codan 9350 and Comet SB-15 Antennas

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

DX-Expedition 1996 8Q7BU and personal info

XU7AAV, ZD8VJ, ZD7VJ, 3D2VJ, T20VJ, A35VJ, 5W1VJ, AH8F, ZK2VJ, 8Q7VJ, V47VJ, 9G5VJ and more

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.

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

San diego dx club

Drake Mods for R4B and R4C models by VE3EFJ

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

2002 CQ WW CW antennas and shack

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

Icom PW1 Linear Amplifier, setup and configuration PDF file

Turkey Network List, Turkish bulletins and Packet downloads.

A forum thread about tuning with the Kenwood TL-922 TL-922A Power amplifier

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.

Home of the Pampanito Amateur Radio Club

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

The Wireless Society of Southern Maine is a ham radio club serving the Portland, Westbrook, Gorham, and Scarborough, areas in Southern Maine.

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

NS8O portable generators

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

Reviews of the popular portable HF transceiver by Elecraft

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

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

EA5FWW Francisco S?nchez Murcia Spain

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

Spanish ham radio chat

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

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

Converting the GN9120 Wireless Bluetooth Interface for Amateur Radio

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

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.

In portuguese by PY4ZBZ

Ullung & Tok-do Island IOTA AS-045

eHam users reviews on MFJ 989 C HF Antenna Tuner

Homebew a frequency marker by 7N3WVM

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

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

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

All ham radio inforamtion needed from M?xico.

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

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

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.

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

You can find all about awards and dx in argentina

A simple freeware scanner program for the Kachina DSP505. The software does NOT control the radio thru the interface port - it works in conjuction with the Kachina control software using the file interface