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NHARC serves the Amateur Radio community in the greater Pittsburgh area USA.

Collection of radio mods for Kenwood TS-870

FT-817 Radio Modifications, Improving the FT-817 Noise Blanker, increasing output power, using rechargeable cells, epanding frequency range

The instructions listed here show you how to set up a Raspberry Pi for use as an RTL-SDR dongle server

The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. As many attest, there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. The Super-J has very little separation between the two half-wave radiators.

Amateur Radio Webring started in July 1997

C-Poles for 20m and 6m, it is a folded half-wave dipole with an asymmetrical tapped 50-Ohm-point in the lower part of the antenna. Design hints by DK7ZB

The HotPaw Morse Code Decoder application for macOS processes audio input to transcribe Morse code characters into text. It presents both an audio spectrum graph and a tone amplitude graph, which aid in configuring a narrow band audio filter. Operators can set the audio filter for tone frequencies between 400 and 1600 Hz, optimizing reception for various CW signals. The software offers user-configurable settings, including WPM dot/dash speed detection, a noise threshold level, and the option to use Farnsworth timing for inter-character spacing. The Morse code WPM detection automatically adapts from approximately 8 to 40 WPM, with a lock feature for the estimated speed. A High Speed WPM Mode is available for code speeds ranging from 40 to 80 WPM, catering to faster CW operators. The application's decoding performance is influenced by signal level, signal-to-noise ratio, frequency and WPM stability, keying quality, and proper configuration, with an initial learning phase required for WPM estimation to stabilize. An external microphone or line-in may be necessary for optimal performance on some MacBook models to mitigate fan noise or room reverberations. Version 1.4.4, updated on November 11, 2021, includes compatibility improvements for newer macOS releases. The developer, Ronald Nicholson of HotPaw Productions, does not collect any user data from the application.

Improve ethical conduct. Unpleasant, uncivil, impolite behavior of our fellow hams reduces the enjoyment of our hobby. What You Can Do to Improve DXEtiquette

The Northern Ohio DX Association (NODXA) operates a voice repeater on 147.36 MHz with a +600 kHz shift, utilizing the club callsign W8DXA. The organization provides an award program for contacting its members and offers DXCC and Honor Roll patches to recognize member achievements. NODXA publishes a monthly newsletter containing DX information and meeting minutes, with a recent brochure and membership application dated May 2024. The club actively promotes DXing, allocating a portion of its finances to support DXpeditions, and several members have also financed their own expeditions. The NODXA roster was last updated in June 2015, and a list of supported DXpeditions was revised in June 2024. Tedd Mirgliotta, KB8NW, serves as the club president and is the editor of the OPDX Bulletin, a widely distributed internet and packet cluster resource. Meetings are held on the first Monday of each month at Amici Italian Restaurant & Bar in North Royalton, Ohio, located at 13000 Royalton Road, near the intersection of Route 82 and W.130th Street. The club leadership includes Dennis Stuber, K8LBT, as Vice President; Glenn Williams, AF8C, as Secretary; and Mary Michaelis, N8DMM, as Treasurer.

The Cumberland Valley Amateur Radio Club (CVARC) has maintained a presence since **1956**, supporting amateur radio operations in South Central Pennsylvania. This resource, while serving as a redirect, indicates the club's long-standing commitment to the hobby within its local community. It points to an updated cyberhome, suggesting ongoing activity and a desire to keep members and interested parties informed about club functions and events. The club's continued online presence, despite a website migration, highlights its dedication to fostering amateur radio. The redirect mechanism ensures that visitors can locate the current _club website_ for information on meetings, activities, and local ham radio support. Such continuity is vital for community organizations, providing a stable point of contact for hams in the Cumberland Valley region.

The purpose of this project is to build a smart switch A smart swith is a swith that needs a short press and the power will be turned ON.

An Homebrew 10 Meter transceiver

After you have build this antenna, you may not need anything else. This article shows how to build a VHF j-pole antenna and how to protect it by inserting it into a PVC tube, the correct way.

An Arduino based CW contest keyer addon, ideated and designed for the use in conbination with the K3NG Arduino keyer open-source firmware.

An omnidirectional and horizontally polarized VHF antenna by EA4EOZ

Sounds of the hf digital radio modes

These photos illustrate the basic steps in making a perfect solder joint on a p.c.b

An illustrated and printable introduction to PSK 31 by by Alan J. Gibbs, VK6PG

Easy to build RS232 keying interface for FSK and CW. Works with most popular RTTY software like MMTTY. Also works for with most contest software such as N1MM and Writelog for CW keying. Uses the RS232 port RTS, DTR, or TX data, optically isolated, PC boards available.

Hellenic news agency

Many Hams suffer from a cruel obsessive-compulsive disorder. They're driven to achieve the lowest possible SWR even when it is not necessary by WB8IMY

The Rolling Home Ham Radio on the Road

Lightweight keys and paddles may be great for backbacking, but what if all you want is the darn thing to stay reasonably still on the desk?

VK3OT audio recorder qsos.

PIC micro controller based frequency counter with LCD readout

The Northern Greece Contest Team (NGCT)official home page

A 2 meter dipole antenna by KV5R

Taking the venerable SMK-1 design to 20m and adding an RF amp, audio filter, and a TiCK Keyer ... by Wayne McFee, NB6M

Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers

This is a page designed to help the EMCOMM operator thinking of going portable. It will describe a way of having VHF UHF HF voice and digital in one box

Online calculator and a full documented pictorial guide to build a single sided 8 slot waveguide antenna

The DK5YA Vhfdx Site is dedicated to the serious VHFDXer, serving the Web for more than 5 years for all of those working Aurora, Meteorscatter, FAI, EME, Tropo, TEP etc. on 50 MHZ and up.

Dedicated to the RTTY contesters worldwide by DK3VN, contest rules and summaries,

Specializing in vintage and antique speaker repair,recone and restoration.

A morse keyer project made on Arduino, inlcudes the main program script by m0xpd

Amateur Radio - Antenna Zoning Book by Fred Hopengarten Telecommunications Lawyer

Photo construction manual of a portable antenna made with two heavy duty whips by buddipole. In this article has been implemented a 50 MHz portable dipole.

Article on ham radio mobile operation from Andy D. Crouch N5NDD

Archive of yaesu ft-1000MP digests since january 2001

Mac the Scope is a professional quality signal analyzer, 1/3 octave RTA, signal generator, and more.

Build the Slim JIM Antenna, a unique VHF Antenna with gain over a J-Pole Jose I. Calderon, DU1ANV

Theory of the ferrite rod antenna

A personal review about the Yaesu FT-817

Lithium Lead NiMH NiCad Ion batteries

Accurate frequency measurement is crucial for amateur radio operators, particularly when building or troubleshooting transceivers and test equipment. This resource details the construction of a _PIC microcontroller_-based frequency counter, providing a practical solution for precise frequency display. The design incorporates an LCD readout, offering clear visual feedback of measured frequencies. The counter can operate as a standalone unit, useful for general bench testing, or be integrated directly into a receiver. Its built-in offset functionality allows for seamless integration, enabling the display of the received signal frequency rather than the intermediate frequency. The project focuses on accessible components and construction techniques, making it suitable for homebrew enthusiasts. Key features include a measurement range up to **50 MHz** and a compact form factor.

The NIDXA is an active DX club affiliated with the ARRL. NIDXA runs the W9 Incoming QSL bureau, a DX Packet Cluster, and the world famous W9DXCC convention.

Spipral antenna principle by a concept of Bill Petlowany, K6NO. Tak Antennas are based on this principle, using spirals as dipole linear wires.

The vertical Double-Zepp 2x7 m is a very simple, effective 8-Band-antenna. The end of the Dipol must be 5-10 m above the ground

Useful hints & tips on building a 10 and 17 meter Moxon Antenna