CY0S Sable Island DX Pedition
DX Resources/DX Peditions/2023 DXpeditions
CY0S Sable Island DX Pedition March 20-29, 2023
Registration Open for the 2023 QSO Today Virtual Ham Expo
The 2023 QSO Today Virtual Ham Expo will be held on March 25 - 26, and registration is now open.
The event is a fully interactive virtual ham radio convention offering new content, networking opportunities, and more than 50 amateur radio presentations on a wide variety of subjects.
There is still time to participate in the event as a presenter. You can submit an application to present a video on ...
70 cm Repeater Project
Technical Reference/Repeater
Multi Mode 70cm DIY Repeater Build Project made with two Tait TM8235 and acting as modem a Repeater Builders MMDVM plus a Raspberry PI
ARRL Audio News February 10, 2023
ARRL Audio News February 10, 2023
Amateur Radio Active in Turkey and Syria Following Earthquakes
In the days following the 7.8 magnitude earthquake and aftershocks that hit Turkey and Syria on February 6, 2023, emergency communications have been active with rescue and response efforts.
The emergency communications group Türkiye Radyo Amatörleri Cemiyeti (TRAC) is coordinating primary communications.
The designated primary disaster communication frequency is 28.540 MHz (USB). In addition, 3.7...
Bouvet Island DXpedition is On the Air!
The 3Y0J team has arrived and begun operations on Bouvet Island. The conditions have been difficult and the team is not yet operating at full capacity.
The 3Y0J Media Officer and East Coast Pilot, Steve Hass, N2AJ, wrote on Facebook that, as of Wednesday, February 8, 2023, the team has only enough power to operate two radios simultaneously. A storm is forecasted to bring high winds to the remote...
UK Scanner Frequencies
Radio Scanning/Regional/Europe
UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.
Amateur Radio on the International Space Station Contacts two US Schools
Astronauts on board the International Space Station (ISS) were busy the last week of January using amateur radio to make contact with two schools.
The Amateur Radio on the International Space Station (ARISS) program arranged contacts with Brentwood Magnet Elementary School in Raleigh, North Carolina, and Norwich Free Academy (NFA) located in Norwich, Connecticut.
On January 26, 2023, nearly 400 s...
Z Match with Toroid
Antennas/Tuners
A single coil Z-Match. This QRP version by G3WQW, using a T130-2 toroidal inductor and polyvaricon variable capacitors was published in Sprat 84.
End-Fed Half-Wave Antenna for 20m 40m 80m
Antennas/End-Fed/End Fed Half Wave Antenna
How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.
Create CLP-5130-2N VHF/UHF Antenna
A one antenna solution for all those who don't have the space or resources for multiple VHF and UHF antennas.
Emergency Communications Due to Earthquake in Turkey
On Monday evening February 6, 2023, there was a 7.8 magnitude earthquake that mainly affected Turkey and Syria but also other neighboring countries with 3,700 people dead and more than 16,000 injured until the last hours, but it is suspected that there are more. According to information received from the emergency coordinators of the IARU R1 countries and, especially from Greg Mossop, G0DUB, th...
How to find out if your choke works
Antennas/Feed Lines/Choke
How many times have you heard the advice to coil a few turns of coax at the antenna end to form a choke. How to find out if your common mode current choke really works
ARRL Foundation Accepting Applications for Grants in February
The ARRL Foundation is now accepting applications for grants to amateur radio organizations. The grants program awards limited funding to organizations for eligible amateur radio-related projects and initiatives, particularly those with a focus in educating, licensing, and supporting amateur radio activities. Youth-based projects and initiatives are especially encouraged. The ARRL Foundation gr...
Los Angeles County Disaster Communications Service
Here you will be able to access all of the information regarding our amateur radio disaster relief communications organization, its divisions and volunteer members
ON7LR-ON4LIR-OTxA
Radioclub, Clubstation, Conteststation
3Y0J Log Online
DX Resources/Log Analysis
3Y0J Club log Log Online page for Bouvet Island DXPedition 2023. Logs will be uploaded when conditions will permit.
Diamond V2000a Antenna
Triband Base Antenna for 6m 2m 70cm bands.
2m to 70cm Transverter Circuit
Technical Reference/Transverters
A 70cm / 432 MHz Transverter Project transverter circuit is an electronic device that converts a radio signal from the 2 meter to the 70 centimeter band and vice versa, allowing a single transmitter/receiver to be used for both bands. It consists of an IF stage, local oscillator, frequency multiplier, and amplifier. The circuit must be designed for minimal signal loss, noise and intermodulation distortion.
Phased Array Antennas
Antennas/Array
Phased array antennas are composed of multiple individual antenna elements that can have their phase and amplitude controlled to steer the main beam direction in real-time. They are used in radar, communications, and electronic warfare, and offer improved gain and reduced side lobes. A comprehensive document on Phased Arrays include techniques to increase the Antenna Gain and change the Radiation Pattern
Hamilton county police scanner frequencies
Radio Scanning/Scanner Frequencies
Scanner Frequencies for Chattanooga / Hamilton County. Chattanooga Police Talkgroups, Chattanooga Fire / Rescue Talkgroups, Chattanooga City Services Talkgroups, police, Hamilton County Sheriff Talkgroups
Yaesu introduces the new FTM-500D Series
FTM-500D Series 50W C4FM/FM 144/430MHz, Dual Band Digital Mobile Transceiver.
Top Amateur Radio Websites - Issue 2306
WinRFCalc Free Windows RF Calculator, Learning Morse Code by the Koch Method, USA Amateur Radio Repeaters, County-Hunting Mapper, Aerial Printing Concepts, GW4ARC Rhyl and District Amateur Radio Club,
Leadership Changes in ARRL Atlantic Division
The ARRL Atlantic Division has new leadership. Tom Abernethy, W3TOM, who had served as an ARRL Director, representing the Atlantic Division since 2015, stepped down on January 6, 2023.
(left to right) ARRL President Rick Roderick, K5UR, recognized Bob Famiglio, K3RF, and Marty Pittinger, KB3MXM, as the new Director and Vice Director, respectfully, of the Atlantic Division during the ARRL Board o...
ARRL Audio News February 3, 2023
ARRL Audio News February 3, 2023
Sound Card Packet
Operating Modes/Packet Radio/Beginner's Guide
This amateur radio website explains how to use the free AGWPE utility program to send and receive packet data using the sound card of your PC. Note that AGWPE is a Windows-only program. This website, which is hosted on SV2AGW's web site, focuses on support for the sound card packet features of AGWPE.
The Weird Antenna Wire End Effect
Antennas/Theory
A half wave wire that is tuned for resonance on 80m will NOT be resonant on 40m despite a precise harmonic relationship between the two bands. The End Effect is caused by a capacitive coupling between an unterminated wire end and the ground.
40 dB Tap Attenuator
Technical Reference/Attenuators
A 40 dB tap attenuator taht need only dissipate 2.3 watts, while delivering the same 0.02 watts to the input sensor.
N7GDE The Radio Amateurs of Skagit County
The Radio Amateurs of Skagit County is a service organization. Dedicated to promote amateur radio, provide communications support for other organizations, and encourage visitors interested in Ham Radio
3Y0J Bouvet DXpedition Web Site
DX Resources/DX Peditions/2023 DXpeditions
DX Pedition to the Bouvet Island official web site featuring all latest news and updates from the most remote uninhabited place on Earth
CubeSats and FUNcube
Operating Modes/Satellites/CubeSats
RSGB page dedicated to CubeSats and FunCube satellites used by radioamateurs
7P8WW Lesotho
DX Resources/DX Peditions/2023 DXpeditions
Lesotho DX Pedition January 26 - February 4, 2023
Q900 Version 3 - ALL BAND ALL MODE HF/VHF/UHF TRANSCEIVER
The Q900 SDR is a compact and versatile all band, all mode transceiver, designed for amateur radio use. It covers a wide range of frequencies from 160 meters to 70 centimeters, and supports multiple modes of operation such as SSB, CW, AM, FM, and digital. It has a compact design and intuitive interface
NASA Cubsat Blog
Operating Modes/Satellites/CubeSats
A blog that provides news and updates about CubeSats, as well as information about CubeSat-related events and projects.
The CubeSat Database
Operating Modes/Satellites/CubeSats
A website that provides information about CubeSats, including the CubeSats' mission, frequencies, and status.
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