Search results

CW decoder using a PIC microcontroller. This is a morse code decoder made using a PIC(16F88) microcontroller, this project supports displays with multiple controller chips

All Satellites Frequency List Update. A complete list of satellite frequencies available in several formats, including info on Satellite Uplink and Downlink frequencies Beacon, operative Mode, Callsign and Weather sat functionality.

The SM1000 allows you to run FreeDV without a PC. Connect the SM1000 to your SSB radio, and you now have Digital Voice (DV). You don’t have to buy a new radio to run Digital Voice! It’s based on a STM32F4 micro-controller, has a built in microphone, speaker amplifier, speaker, and transformer isolated interfaces to your radio.

This is a small collection of K9YC info and my experiences. Problems by feed lines of 1/2 lambda length. CMCs in transmitting and receiving systems. Antenna unbalance, Maximal allowed power, Choke winding tips.

Alpha 87A Amplifier Fault 1 and the downlevel amplifier

The DX FT8 is a compact, multiband tablet transceiver designed for FT8 digital mode enthusiasts. Supporting five or seven HF bands, it integrates an STM32F746-based touchscreen interface for standalone operation, eliminating the need for a PC. The latest firmware (v1.9.2) adds SOTA/POTA calling and free-text messaging. Its efficient power design, unique RF amplifier, and 3D-printed case enhance portability. Open-source firmware and community-driven development make it a versatile choice for portable FT8 operation, ideal for SOTA, POTA, and travel use. DX FT8 TRANSCEIVER PROJECT is a collaboration between Charles(Charley)Hill, W5BAA and Barbaros(Barb)Asuroglu, WB2CBA.

A simple and effective sleeve type balun is easily built. This Balun can be adapted to any band. While the dimensions are not critical ( +/- 10%), it is still basically a mono band device

This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure.

2013 Apr 13 - 2013 Apr 20 Palm The Grenadines

Barry County, Michigan, USA

Here is a formula and calculator for creating a loaded (shortened) quarter wave vertical or balanced dipole. The calculation refers to either a loaded 1/4 wave or a loaded dipole

QSO Recorder Indexing service. This site allows radio amateurs to share their contest and DXpedition audio recordings, usually made with the N1MM Logger+ and the Qsorder plugin

The South Manchester Radio and Computing Club (SMRCC) provides a vibrant community for radio amateurs and computing enthusiasts in Sale, Cheshire, UK. Established as an active local club, it hosts regular weekly talks covering diverse subjects within both amateur radio and general computing. Members engage in various activities, fostering knowledge exchange and practical skills development across different facets of the hobby. The club's focus extends to supporting members in their pursuit of radio operating, technical projects, and digital communication methods. With a consistent schedule of meetings, SMRCC aims to be a central hub for local hams and those interested in the intersection of radio and computer technology. The club's activities contribute to the local amateur radio scene, offering opportunities for learning and social interaction.

Experimentin wire antennas on top band using several type of aerials. This includes a 40 to 160 meters EndFed Half Wave kite antennas and 160m/80m loaded vertical antenna.

Extended Double Zepp measurements for all ham bands, and online calculator. The antenna is constructed much like an ordinary Dipole antenna but with 5/8 Wavelength Elements matched with an added Impedance Matching Section of balanced feed line

Procedure for foreign ham radio licensees to establish a station in Japan

Amateur Radio Expedition to Juan de Nova Isl. FT4JA March 29th - April 11th 2016

This app will generate a QSL card design based on the input paramters as a PDF. Fields marked by a * are required, but the rest are optional. The options at the bottom allow you to customise the look and feel of the QSL card. If you would like, you can also download the LaTeX source file and customise it.

Personal web site of swedish amateur radio club SK3GA

This WEBSDR runs on Raspberry PI4-8G, Afedri-Net RX for 160m, RTL-SDR stick with homemade SBL1 mixer upconverter and fullsize 160m Delta loop antenna 4m up. Operated from Ukraine by UR5WT, US5WE and UX5DH,

V6 Micronesia JA7HMZ will operate as V63DX and JA7GYP as V63T Pohnpei Island (OC-010) 15-20 April 2013

The Tyler County Amateur Radio Association (TCARA) serves as a focal point for amateur radio operators in Woodville, Texas, and surrounding areas, emphasizing knowledge sharing and skill advancement among its members. The association actively participates in public service communications, including _ARES_, _RACES_, and _Skywarn_ initiatives, demonstrating a commitment to community support through amateur radio. Regular meetings are held on the first Thursday of each month at 6 PM at Calvary Baptist Church, 909 N Magnolia St, Woodville, TX, providing a consistent venue for fellowship and operational planning. TCARA facilitates amateur radio license examinations, offering testing sessions for all license classes, from Technician to Amateur Extra. This commitment to education supports new hams entering the hobby and existing operators upgrading their privileges. Prospective members or individuals interested in licensing, Technician classes, or general club activities are encouraged to reach out via email for further information, indicating a direct channel for engagement.

A ham radio home made preamplifier for 50 MHz and 70 MHz bands

Arizona QSO party web site

The DV Access Point Dongle connects to your PC or Intel based Mac via a USB port and provides a 2 meter Access Point for use with a D-STAR radio. Using an Internet connection, a user may connect to and communicate with D-STAR gateways and reflectors around the world

Ham365 let you follow the main DX-peditions on a dedicated calendar page that shows the schedule of all monthly expeditions, running dxpeditions and even shows the dxpeditions reported on their users logs or cluster spots.

KA4RRU/B Ten Meter Beacon

Operating marine mobile with antennas for 15-17-20 meters band.

The PJ5 St. Eustatius DXpedition, active from November 16 to November 30, 2019, involved operators SP6IXF and SP6EQZ. This operation targeted Saint Eustatius, designated as NA-145 for IOTA purposes, and focused on all HF bands using CW, SSB, and digital modes. The team logged approximately 23,000 QSOs during their deployment. QSLs for PJ5 contacts are managed via the operators' home callsigns, SP6IXF and SP6EQZ, with _LoTW_ confirmation available. The expedition also participated in the _CQ WW CW_ contest, contributing to the overall QSO count. Additional support came from individuals such as JA1BK, JA3DND, SP5BB, SP5GMM, SP9FMP, SQ7NSN, and KB7MM.

Downloading and installing all needed packages to make a Raspberry Pi as an APRS Tracker. Configuring direwolf and setting NTP on the Raspberry Pi

Construction of an antenna for experimental satellite communication, 8el. (435 Mhz) x 4el. (145 Mhz) Satellite Yagi crossed. No difficulty to built this antenna. Except the gamma match. that requires a little more attention

South Carolina District for the SERA

Spy Numbers Stations are shortwave radio stations that are speculated to have been broadcasting since World War I. The true origin and purpose of them are unknown. A popular theory is that these stations are intended for spies in the field using a One Time Pad. Another theory is that they are used in drug smuggling operations.

Torbay Amateur Television and Microwave Group GB3TB 23cms Repeater at IO8ØFL

A simple 3D Paddel CW Key made of plastic with a standard 3d printer

This antenna looks like an inverted L antenna, yet it is not, it could also be viewed as a 160m off-center fed dipole antenna, it looks more like an end-fed 1/4 wave 160 meter antenna.

_Amphenol RF_ manufactures RF connectors, RF adapters, RF attenuators, RF cable assemblies, and RF terminators. The company offers custom RF solutions, including modified connectors and integrated cable assemblies. Product examples include SMP to SMPM adapters, surface-mount SMB jack connectors, end-launch SMA bulkhead connectors, and non-magnetic SMPM connectors. The company's product portfolio also features single-crimp N-Type connectors, USCAR compliant Mini-FAKRA connectors, 2.4 mm to 2.4 mm adapters, and 2.92 mm plugs for 0.141-inch cable. _Amphenol RF_ produces MMCX and MCX cable assemblies on RG-316 and RG-174 cable, PFAS-free SMA connectors, and FAKRA rear mount bulkhead plugs for RG-58 and LMR-195 cable. Additional offerings include 2.92 mm to 2.92 mm adapters, BNC bulkhead jacks, SMA to MHF 4 LK cable assemblies, and 2.92 mm to SMA adapters. _Amphenol RF_ is headquartered in Danbury, Connecticut, and operates as part of _Amphenol Corporation_. The company maintains a global manufacturing and distribution network. DXZone Focus: RF connectors | Cable assemblies | Danbury, Connecticut | _Amphenol Corporation_

An home madek Audio CW Filter made simply using SMD Components

Official web site of the CQ World Wide VHF Contest The contest promotes VHF activity on the 6 and 2 meter bands with participation from around the world.

DXPSK and SMARTPSK are freeware Windows PSK31 software tools capable to send and recive even multiple tracks of PSK31 signals. SMARTPSK is the improved version of DXPSK capable to display up to 25 tracks.

DXSPOTS is a Telnet connection program. It allows radio amateurs with a lot of DX traffic to know instantly the status of the bands and to know which DX are currently on the air. Following the Packet-Clusters where data was transmitted on VHF/UHF via dedicated relays and sometimes on HF at a very low speed (300Bds on HF), the Internet has taken over and is now transmitting DX information via the computers in most shacks. Translated with www.DeepL.com/Translator (free version)

The Martello Tower Group is an amateur radio group which was originally formed in the late 1980s under the name ClackPak.

The Worthing and District Amateur Radio Club

Details the operational scope and maintenance requirements for the Gloucestershire Repeater Group's amateur radio repeater network. It outlines the financial obligations associated with site rent, electricity, insurance, and professional aerial maintenance, emphasizing the necessity of member support or donations for sustained operation. The resource provides information on accessing individual repeater systems via the site menu. It also announces the 2026 Annual General Meeting (AGM) details, including the date, time, and location at The Robins Nest, Cheltenham Town Football Club, noting the venue is shared with the Cheltenham Amateur Radio Association. The page highlights the availability of the repeaters to all licensed radio amateurs and details how to contribute to their upkeep through membership or direct donations.

LB3HC's hightech blog - Amateur radio, RF design, electronics, uC, software, Arduino, AVR, Antennas

The Strategic Air Command Memorial Amateur Radio Club

First released in 1988, _SWLog_ is a comprehensive suite of applications providing logging and remote control for both amateur radio and shortwave, utility, and broadcast listening. It integrates program schedules from sources like _HFCC_, _ILGRadio_, and _EiBi_ for broadcast reception, while also linking with amateur radio logbooks such as _ClubLog_, _eQSL_, _QRZ_, and _LoTW_. The software supports radio control for various transceivers, including _Flex_, Icom, Yaesu, and Kenwood, alongside interfaces like _FLRig_, _OmniRig_, and _HamLib_. Mobile applications for Android and iOS facilitate on-the-go logging and remote control, seamlessly transferring logs without manual ADIF export. _SWLog_ leverages an enterprise-grade relational database (SQL Server) for robust data management and analytics, enabling features like mapping QSOs by band or state. It offers specific integrations for _POTA_ monitoring, displaying active spots with real-time propagation and automatic radio tuning. The application's scalability allows multiple users to log to a centralized database, suitable for Field Day or DXpeditions. The user interface features modern aesthetics with light, dark, and gray themes, the latter optimized for outdoor visibility during activities like _POTA_ or _SOTA_. The Plus Edition, available for an annual fee, expands capabilities with advanced QSL integration, additional map providers, and enhanced propagation calculations using _VOACAP_.

The video delves into the significance of interference reduction in ham radio setups by utilizing ferrite materials. It demonstrates the use of spectrum analyzers and tracking generators to showcase the performance of ferrite devices in minimizing noise levels. The analysis includes insights on resistance levels, attenuation factors, and the impact of using multiple ferrite clamps or rings to enhance noise reduction capabilities. Viewers gain a deeper understanding of ferrite composition, characteristic curves, and winding techniques for effective noise attenuation in different frequency ranges. Overall, the video serves as a comprehensive guide to optimizing interference reduction in radio environments through the strategic use of ferrite materials.

Online Log for Mayotte 2018 DX Pedition TO6OK

Official web site of the VP6D DXPedition to Ducie Island 20th October - 3rd November 2018 IOTA OC-182