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Some technical information for on Opto Isolation, Transformer Isolation, Surge Protection

Display time around the workd just with a point and click

Accurate meteorological data is crucial for optimizing antenna performance, predicting propagation, and ensuring safe tower work. This resource provides a curated inventory of weather stations, including models like the _AcuRite Atlas_ with lightning detection and the _Ambient Weather WS-2902_ WiFi Smart Weather Station, which offer real-time data on environmental factors. The product listings detail specific features such as direct-to-Wi-Fi connectivity, rainfall tracking, and temperature insights, enabling informed decision-making for various amateur radio operations. The platform categorizes products by application, featuring weather stations tailored for home and backyard use, as well as more robust systems for farm and agriculture, which can be critical for field day operations or remote station monitoring. It also highlights _Made in USA_ options, emphasizing local manufacturing and support. Beyond weather instruments, the site also presents related surveillance technology, such as the _Waggle solar CCTV camera_, designed for outdoor reliability with an IP65 weatherproof rating. This integration allows for comprehensive monitoring of remote ham radio shacks or antenna sites, combining environmental data with visual oversight.

Windows shareware contest log program for the CQ 160 meters contest

The wire antenna described in this page provides much stronger signal strength while staying within the concept of a dummy load antenna.

Elecraft K1 & K2 PCB scanned top & bottom, for troubleshooting

A blog from poland about VHF and Satellite operations, including D-Star. Many pictures and movies from this active vhf dxer

A website for college and university amateur radio clubs to showcase themselves, work together, and promote amateur radio. Alumni and interested people can learn more about what college and university amateur radio clubs are doing.

Why build antennas out of copper and not aluminum or stainless steel. Selecting the best metals for antennas evaluating the conductivity factor.

News of Ham radio in the world

Modem Telephone Super Filters For HF and AM Radio Interference.

Official Kenwood memory control program for TM-V71A / TM-V71E TM-D710A / TM-D710E RC-D710

This is the blog for the M0BGR Amateur Radio Station. I am based in London, England but frequently go out mobile or portable.

Quartslab has over 30 years of experience in supplying quartz crystals to the international communications market. Our product range includes the supply of quartz crystals in the frequency range 1.5 to 225 MHz in all popular holder types as well as crystal oscillators in DIL8 and DIL14 packages.

Spanish amaterur and cb radio classified ads

Barest of bones APRS RF position reporter using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and the radio

Delta Electronics Manufacturing, a global manufacturer, specializes in _RF connectors_, adapters, and cable assemblies, providing custom interconnect solutions with superior performance. Their Advanced Vertically Integrated (AVI) global facilities emphasize efficiency, quality, flexibility, and cost control across their product lines. The company serves diverse industries, including broadcast and audio, test and measurement, military, aerospace, and public safety communications. For instance, Delta supplies RF interfaces for military aircraft, satellite launch vehicles, and missiles, maintaining a long-standing QPL supplier status. Their field-tested RF interconnects are also crucial for two-way radios, base station equipment, and antenna systems in public safety applications, ensuring reliable performance in critical communication infrastructure. Delta's solutions extend to commercial aircraft and semiconductor manufacturing, where their RF interconnects power etch equipment, deposition equipment, and chip testing systems worldwide.

Product specialist for semiconductors and electron tubes based in Belgium

A prototype of a switch foot made on a square aluminium stock frame

An interesting article on basics about Baluns, intoducing the skin effects on radio frequency currents and its effects on receiving and trasmitting article by VE7FO

AA5TB portable station for 30 meter QRP operations

Shortwave listening web site from Brazil

Designer and manufacturer of RF amplifiers used in a variety of custom applications in many diverse industries - from Scientific, Medical, Industrial, and Communications and Broadcast.

Custom Designed Photo QSL Cards, Full Color stunning designs, High Quality Printing at competitive Prices. US based QSL designer and printer specialized in custom-designed ham QSL cards.

This page introduces the world IARU Grid Locator system, and discusses how to find out what your own Grid Locator is.

Amateur Radio related activities of HB9EGA

KiwiSDR Software-defined receiver at Bjargtangar Iceland covering HF Bands

Sponsored by the Scandinavian Amateur Radio Teleprinter Group

Over 100 distinct RF connector types are available from AIR802, including popular UHF series PL-259 plugs and SO-239 sockets, designed for a wide array of coaxial cable dimensions. The company specializes in producing connectors compatible with common amateur radio cables like RG-8, RG-213, and RG-58, ensuring reliable signal integrity for antenna systems and shack interconnections. Their product line extends to various coaxial cable types and pre-made antenna cable assemblies, offering ready-to-deploy solutions for hams. AIR802 also provides custom cable assemblies and pigtails, catering to specific installation requirements for transceivers, tuners, and amplifiers. These pre-fabricated options simplify station setup, reducing the need for field termination of connectors. Michael Bryant is the contact for inquiries regarding their range of RF components, which are essential for building robust and efficient amateur radio stations.

Custom EMI Filters, AC DC Three phase filters by Filter Concepts Inc.

Hot Springs Village AR

Ham radio club Decatur Illinois

Located in Upstate New York, specialize in unusual surplus equipment, mostly of military origin.

Realization of confortable communications. RF Filters

9J2T dx pedition to Zambia 2014 by IDT

Carolinas Chapter of the Antique Wireless Association Inc. "CC-AWA"

A 70 cm yagi antenna design by YU7EF includes tables with antenna elements dimension and spacing. This UHF Yagi antenna plan provides a maximum gain of 17.93 db

Dedicated to the Indiana D-Star Amateur Radio Users

Manufacturer of low cost RF signal generators and portable measuring instruments.

The Pro 95 is a dual trunking handheld scanner designed by GRE and sold by Radio Shack

QRP amateur radio & stuff by Adrian YO4HHP

Electronic Component Distributor - ASAP Semiconductor is wholesale electronic component distributor in USA. We supply all types of electronic components like semiconductors, capacitors, resistors, diodes and many more

Cable dealer of custom and standard cables, tools and testers,

A very compact and multifunctional digital amateur radio station for the radio operation at home, on the way or in the emergency radio implemented with a Raspberry Pi 4, an Elecraft KX2, a Kenwood TH-D74 and a USB GPS.

This is a standard calculation method that can help you while tuning dipole antennas, by adjusting wire lengths. This method can be used also when you need to add lenght to your wires, and can be additionally used to quarter waves vertical antennas

Icom 706MkIIG Filters, Make a narrow CW filter work in SSB for the digital modes

An interesting article dedicated to hams that want to start learning morse code, including notes on Methodology, online training tools, and a guide to Morse Keys

MikroTik is a Latvian company which founded in 1995 to develop routers and wireless ISP systems. Wifi Routers, router boards, switches, interfaces and enclosures.

The PI6ATV repeater, operating on 10.475 MHz, serves the amateur television community by providing both analog and digital DVB-S2 services. Recent updates include user-adjustable Symbol Rate settings via Webcontrol, allowing operators to optimize their digital ATV transmissions for various conditions. This functionality, implemented on December 13, 2022, enables dynamic configuration of the digital stream. Significant technical milestones include the return of the analog ATV transmitter on 10.475 MHz, featuring a newly constructed liquid-cooled final amplifier by Edwin PD2EBH. This restoration on September 6, 2020, followed an 18-month hiatus, ensuring continued support for traditional analog ATV enthusiasts. The repeater's transition to DVB-S2 modulation, initiated on December 20, 2018, addressed capacity limitations of the previous DVB-S setup. This change from 20 MS/s with FEC 3/4 to DVB-S2 allowed for more efficient data handling, accommodating multiple channels within the available bandwidth and enhancing the overall digital ATV experience.

Artwork Created in Verve by Michael A. Maynard K4ICY includes some nice amateur radio related paints