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Radio shop in nevada

Theory of horizontal loop antennas, as discovered by G2PL using a lowered quad antenna and theorized by ZS6AKA

Information about pirate radios, what they are and why are considered pirates

A lower power desktop linear with integrated 120vac power supply. This, very compact, dual 811 version will deliver about 300 watts output. Covers all bands including WARC bands.

An interesting article by K3DAV comparing the COMET CHA250B to other HF multiband vertical antennas

Double Bazooka Antenna, a simple coax based and broad band antenna you can easily build

Telescopic antenna towers, fixed antenna towers, stacked and sigle section antenna towers, trailer towers, cargo trailers accessories

Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground

This is an 80 metre dipole that fits in a small spac

Testing the tv reception mod for the us version. tv reception was disabled on the us version because of the possibility of it being used while driving.

A DIY project details the construction of a modular QRP CW transceiver specifically designed for the **20-meter band**. The design is segmented into three distinct modules—VFO, Receiver, and Transmitter—allowing for phased construction and independent testing. The VFO circuit, capable of operating as a conversion VFO or a free oscillator, provides a frequency span of approximately _70 KHz_ (2.433 to 2.510 MHz) with a 4V pp output level, utilizing a Colpitts FET oscillator and buffer. The receiver employs a classic superheterodyne architecture with MOSFETs in the front end and mixer for improved overload immunity, incorporating a 4-crystal ladder filter with a 600 Hz bandpass and an LM386 audio power amplifier delivering about 1W into an 8-ohm load. The transmitter section uses frequency conversion with an NE602 mixer to achieve 14 MHz operation, featuring a power broadband stage capable of 4-5W output into a dummy load, and includes a double Pi filter for signal cleanliness. The resource provides detailed component lists, tuning instructions for each module, and 1:1 scale PCB layouts for single-sided boards.

DTMF-KIT1 board for Transceiver, board for Telephone-Line and Remote-control without a HAM Transceiver

Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX

The resource details the historical development of the Morgain antenna, tracing its origins to Virginia in the 1960s and its subsequent global adoption among radio amateurs. It describes the Morgain as a dual-band wire antenna known for its reduced footprint and modest gain characteristics. The content includes discussions on various homebrew projects and design variations available online, providing context for its continued relevance in amateur radio. The article presents a historical overview rather than specific construction plans, focusing on the antenna's evolution and general design principles. It highlights the antenna's enduring appeal due to its performance attributes and compact size, making it suitable for various operating environments.

List of police, fire and emergency scanner codes listed in numerical order.

Win92 - Windows-based data management for the Pro-92/2067 trunking scanner

Backpacking, boating or mountaintopping ? Invest your time and pack this novel directional gain antenna on your next expedition

The UK amateur radio licensing scheme features three distinct tiers: Foundation, Intermediate, and Full, each granting specific operating privileges. For instance, the **Foundation Licence** permits a maximum of 10 watts output power on most allocated bands, with restricted band access. The Intermediate Licence allows up to 50 watts, while the **Full Licence** grants access to the maximum UK legal power limits and all available amateur radio band allocations. UK call sign prefixes and formats provide insights into the licensee's class and the approximate issuance date. For example, M3, M6, and M7 prefixes with three letters denote Foundation Licences issued from 2002, 2008, and 2018 respectively. Intermediate Licences, often starting with "2E0" or "2E1" followed by three letters, were issued from 1991 onwards. Full Licences encompass a broader range of prefixes like G2, G3, G4, G0, and M0, with varying letter counts indicating different historical license classes and issuance periods, such as G3 plus three letters issued between 1946 and 1971. Special prefixes like GB are reserved for repeaters, beacons, data mailboxes, and special event stations, with specific numerical sequences (e.g., GB3 for repeaters, GB7 for data repeaters/mailboxes) indicating their function. Optional prefixes such as GC, GD, GI, GM, and GW denote specific UK countries (e.g., Wales, Isle of Man, Northern Ireland, Scotland, England) and can also signify club stations.

Broadcast Tower Specialist. Offering Manufacturing, Engineering, Erection and Tower Extension Services. Self Supporting or Guyed Towers.

A project for a home made 5 element yagi-uda antenna for 2 meters, covering 144-148 MHz band by N1BMX

Transistor and its history and lot of related infos

Audio and waterfall images of some sounds found on the RF spectrum

Details Guglielmo Marconi's foundational contributions to radio communication, highlighting his 1898 Patent **7777** which introduced tuning circuits for independent simultaneous communications. Chronicles the historic transatlantic reception of the Morse code letter 'S' on December 12, 1901, from Poldhu, Cornwall, to St. John's, Newfoundland, a distance of over _3,500 kilometers_. The exhibit showcases early Marconi 10-inch spark transmitters, identical to those used on the _Titanic_, alongside Canadian Marconi crystal detector models. It also features high-end commercial receivers like the IP501, weighing **87 pounds** and originally priced at $595.00, demonstrating the robust construction and technological advancements of the era.

DX Atlas - DX Locations of the World by QRZ.com

St. Louis County Police Dispatch

TX RX Systems Inc. offers a robust catalog of RF conditioning products, including **transmitter combiners**, receiver multicouplers, and various RF filters. Their extensive experience, spanning over 45 years in the RF and Land Mobile Radio (LMR) industries, underpins their specialized offerings. They provide solutions for in-building RF coverage, repeater systems, and general RF management, catering to the demanding requirements of professional radio communications. Their product line features **bidirectional amplifiers (BDAs)**, signal boosters, and cavity filters, essential components for optimizing radio system performance. The company emphasizes reliable solutions, leveraging decades of field-proven expertise in designing and manufacturing critical RF infrastructure. From duplexers to cell enhancers, TX RX Systems focuses on delivering high-quality RF components and integrated systems designed to ensure clear and consistent radio signal integrity across diverse operational environments.

Frequencies, links for scanners, email lists, online audio and more for Maryland, DC, and parts of Delaware and Virginia

Statistics based on FCC Database. Data is compared to previous perions.

How test a Balun quality by W8JI

AR-82000 software

An emergency service provided to the city of Mountain View, California and the surrounding communities in time of need.

Grahams Goldcoast Australia Radio Scanner Frequencies

Universal radio IC-V8000 page includes accessories and photos

Kenwood Sales, Service, repairs, parts, FAQ, information

miLog provides an integrated software solution for amateur radio station management, encompassing logging, DXing, and contesting functionalities. The software is designed to operate on Windows 2000 and later versions, indicating a focus on stability and compatibility within the Microsoft ecosystem. Its feature set includes comprehensive logging capabilities, tools for DX operations, and specific modules tailored for competitive contesting, streamlining the workflow for operators engaged in these activities. The resource details the software's commercial availability and its primary functions, which extend to station control. This integration allows users to manage multiple aspects of their amateur radio operations from a single application, potentially reducing the need for disparate tools. The description also highlights support for various operating modes, suggesting flexibility for different communication protocols and techniques. While the page itself is minimal, it serves as a direct point of reference for miLog, outlining its core purpose and system requirements. The emphasis on a highly integrated approach distinguishes it as a tool aiming to consolidate essential ham radio software functions.

A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.

On-Line CB Radio and truck accessory shop based in UK

An inverted Vee antenna calculator that consider also minimun vertical height and horizontal spread by M0UKD

Pictures taken during lifting of a Rohn antnena tower

Generates dial tones using the Soundcard. A neat tool for sending out short sequences of DTMF tones.

Search the J5T Log online DX Pedition to Guinea Bissau 2017

A helpful guide to building your own beverage-type low noise receiving antenna for broadband use. Easy, do-it-yourself suggestions to optimize directional performance, even if you lack a farm to put it on.

Notes and information about G5RV antenna, analysis of short feed lines and relation with SWR

By Justin Glasener K9MU

A PDF presentation of a home made moxon antenna for 50 MHz 70 MHz and 144 Mhz. The project is mainly out of surplus plastic Plumbing pipes and clips etc, and also details of how the dimensions were calculated.

Videos of AO-51 operations. Randy K7AGE has produced a number of practical and useful videos including good info on a minimal antenna setup for AO-51 reception.

Nowdays lots of people are putting up antennas to either beam in different directions at the same time or just to stack them and get a lower angle of radiation. Use this stackmatch to match you array.

High Power RF Amplifiers by Delta Sigma, Inc

SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.

Dentron GLA-1000 Conversion, modification with 4 x PL/EL-519 or 2 x GI-7B