Search results

A Bencher antenna divsion, manufacturer of HF YAGI and Vertical antennas

A 3 element yagi beam for 40 meters band

Telstar Electronics has been designing and manufacturing premium electronic products since 1995. Makers of VoiceMax Transceiver Speech Processor and SkyWaveDX350

A pedestrian antenna is considered to be a lightweight antenna that can easily be carried to the shootout by one person in a backpack or bag.

Vibroplex morse keys and keyers.

A Quad Fractal Antenna for 20 meters band by F3DD

An illustrated and complete guide to soldering PL-256 coax plugs

Data Management for the RadioShack PRO-95 Trunking Scanner

QTH.COM offers a comprehensive platform for amateur radio enthusiasts to buy, sell, and trade equipment. This online service is designed to facilitate transactions between hams, allowing users to list their gear for free. Whether you're looking for HF or VHF equipment, antennas, or even vintage radios, QTH.COM serves as a hub for all your ham radio needs. The site is user-friendly and accessible, making it easy for both seasoned operators and newcomers to navigate the listings. In addition to individual sellers, QTH.COM also attracts dealers and manufacturers looking to reach a wider audience. With a diverse range of categories, including military radios and radio tubes, users can find unique items that may not be available elsewhere. The platform's commitment to providing a free service ensures that all hams can participate in the marketplace without financial barriers. Join the community at QTH.COM and discover the best deals in the ham radio world.

A 2-meter Turnstile antenna, detailed for amateur satellite communication, offers a straightforward build for those looking to engage with orbiting transponders. The author, WB8ERJ, shares his personal design and construction methods, emphasizing the antenna's simplicity and effectiveness for LEO (Low Earth Orbit) satellite work. This design provides a circularly polarized signal, crucial for mitigating _Faraday rotation_ and signal fading often encountered with linearly polarized antennas when tracking satellites. Construction involves readily available materials like PVC pipe and copper wire, making it an accessible project for many hams. The article includes practical advice on element spacing and feed point considerations, drawing from the author's hands-on experience in the shack and field. It highlights the antenna's utility for receiving signals from various amateur satellites, including the popular AO-91 and AO-92. The Turnstile's inherent omnidirectional pattern in the horizontal plane, combined with its circular polarization, yields consistent signal reception, often resulting in **stronger decodes** and **more reliable contacts** compared to basic dipoles or verticals.

Rhombic Antenna dimensions for HF and VHF bands by N6JSX

A simple T-network that can match any unbalanced antenna system by AA5TB

SuperAntenna offer Portable, Stealth, Mobile, Base, Backpack, EmComm, Ham Radio, Marine, MARS, CAP, HF SSB, Gov, NGO and Commercial antennas

Amateur quarter wave ground plane antenna calculator, calculate vertical and radial length

Demonstrates a **DX cluster** web service providing real-time amateur radio spot reports, propagation information, and solar data. The platform integrates features such as a gray line map, **DXCC** tracking, and a personal logbook, allowing users to manage their confirmed entities and contacts. It supports various bands from 160m to 70cm, including specific filters for modes like FT8/FT4, and offers both web and Telnet access for spotting and monitoring. The service provides graphical representations of spot reports, detailing activity across different frequency bands and modes (CW, SSB, digital). Registered users gain access to advanced functionalities, including personalized filters and tools for calculating DXCC status. The platform also includes a classifieds section and options for mobile access, catering to a broad range of amateur radio operators interested in DXing and contesting.

Source of common model manuals and amateur help on amplifier problems for the amateur bands, Discussion of vacuum tube amplifiers. Technical information and discussion of obselete tube replacement.

Dummy load described here can be used for up to 35 watts for short transmissions, and up to 25 watts for longer periods.

MoxGen will show you the dimensions and generate an antenna model file for a 50 ohm Moxon Rectangle antenna, given the design frequency and wire size

adsbScope is a freeware Windows application designed for processing _ADS-B_ (Automatic Dependent Surveillance-Broadcast) frames received from a compatible decoder. It identifies aircraft, calculates their real-time positions, and presents flight parameters in both alphanumeric tables and a graphical display. The software interfaces via a virtual COM port, receiving raw frames to provide detailed situational awareness, including a global coordinate grid, continental coastlines, over 4,000 **airport** locations, and major cities. Users can overlay OpenStreetMap tiles and view world state boundaries, with each tracked aircraft rendered with labels showing altitude, speed, heading, squawk code, and flight identifiers. When paired with the adsbPIC-decoder, adsbScope enables advanced hardware control, allowing users to toggle data filters for specific frames like DF17/18/19, adjust analog signal thresholds for reception fine-tuning, and manage system resets or bootloader activation directly from the PC. This functionality provides a customizable toolkit for hobbyist radar listeners, offering a robust alternative to commercial tools for processing aircraft data. The software displays up to **1090 MHz** transponder data and can track aircraft up to 250 nautical miles.

The terminated tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.

This article describes a simple, inexpensive, dipole antenna that will rival the performance of a ten-meter beam.

Professional tower supplies and specialty products for amateurs and industry.

Constructing a high-power solid-state amplifier for HF operations presents unique challenges, particularly when aiming for significant output like 600 watts. This project details an amplifier design employing **Motorola MRF150** FETs, a common choice for their robust performance in RF power applications. The design emphasizes achieving substantial power output, a critical factor for effective DXing and contesting, where every decibel can make a difference in signal propagation and readability. While specific circuit diagrams or construction details are not directly presented on the current page, the mention of MRF150 FETs points towards a design that would typically involve push-pull configurations, impedance matching networks, and robust power supply considerations to handle the high current demands. Such amplifiers are often built with an eye towards linearity and efficiency across the HF bands. Amateurs pursuing similar high-power solid-state projects often share insights on thermal management, intermodulation distortion, and component sourcing, all vital for a stable and reliable amplifier capable of delivering 600 watts into a proper antenna system.

A 1:1 current balun by N5ESE

Icom PCR 1000 at NASA Marshall Space Flight Center monitoring meteor signals on 67.3 mhz.live.

Using Hi-Fi Audio with FT-1000. Includes many FT-1000D modifications too by K6JRF

Information regarding CB radio and the problems you may encounter during installation and use of your system.

Log Online for 5J0R

NuMorse 2.20.0.0 for Win 7/Win 8/XP/Vista/Win 10 A complete rewrite of the original NuMorse used by thousands of radio amateurs to gain and upgrade their licenses. NuMorse offers an intermediate feature set that is somewhere between the lean and mean NuCode program and the vast array of features supported by NuMorse Professional. But NuMorse is no cut-down program. It has several unique features not found in other Nu-Ware products as well as a compact and intuitive set of controls that you will be able to learn quickly.Product is no more developed and out of support.

Broadcastify currently hosts 7,266 live public safety radio feeds, providing real-time scanner audio for police, fire, and EMS operations. The platform aggregates transmissions from various emergency services, allowing users to monitor local dispatch and response activities across numerous geographic areas. It functions as a centralized hub for streaming publicly accessible radio traffic, distinctly separate from amateur radio operations or traditional _DXing_ pursuits, focusing instead on unencrypted public safety communications. The resource primarily focuses on public safety radio systems, which typically operate on VHF/UHF frequencies, often employing trunked radio system architectures. It does not involve amateur radio bands but rather provides direct access to publicly available emergency service communications. The content is organized into categories like Top Feeds, New Feeds, and Official Feeds, facilitating navigation through its extensive catalog. Broadcastify's utility stems from its efficient aggregation and streaming infrastructure, offering a direct link to local emergency dispatch and response. The platform also details its operational mechanics and lists official providers, indicating a structured approach to content sourcing and distribution.

Why a vertical antenna or longwire antenna might require a balun

the multiband Notebook Antenna, so called because the entire antenna will fit easily inside a 1" thick 3-ring binder

Welcome to the web site of Wilson Antenna, Inc., manufacturers of the worlds most powerful CB antennas for the automobile and 18 wheel tractor rigs.

KO4NR coax cable antenna switch construction by ve3cgc

Spanish CB Radio museum

A 40m through 17m Mini End Fed Half Wave Antenna Coupler by Steve Yates - AA5TB

Requires no modifications to a USB WIFI adaptor or your computer.

Freeware Hellschreiber decoding program for windows by Nino Porcino

Based on VK5BR's Z-Match and designed for High RF Power covers 160 to 10 meters by VK6YSF

Table of frequency allocations international & US by Bill McFadden

Import/export of cb transceivers, antennas, speakers, power supplies, etc. Firestik, sirio, sadelta, hustler, boomerang, president, k-po, shakespeare, danita, k-40, wilson, midland

Phased array Ground Planes antennas for 144 Mhz

Wire antennas requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (5000 ohms)

the European equivalent of the Family Radio Service (FRS) in the U.S. and Canada, FRS/PMR? Why 2 standards?, What PMR radios exist? And how much do they cost?

Phased arrays of short vertical antennas. A technical notes from Butternut antennas on phased vertical arrays

This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. Being a half wave, no radials or counterpose wires are needed.

20 meters through 6 meters, antennas

Homebrew balanced-L antenna tuner. Covers 160-10m. Designed specifically for balanced feedlines.

This is a hex beam designed for six meters. It has three elements with a turning radius of 54 inches. This antenna can be built from low cost materials available from the local hardware store. By WB3BEL

BroadWave Streaming Audio Software facilitates the broadcast of live and pre-recorded audio content over the internet, operating as a server on Windows PCs. It supports streaming from over 40 audio formats, automatically converting files for optimal delivery. The software allows for up to 8 separate live audio streams from a single PC and can serve up to 500 simultaneous listeners, contingent on available internet bandwidth. Listeners access streams directly through standard web browsers, eliminating the need for specialized client software. The free version, available for non-commercial applications, includes most features and does not expire. It supports recording live audio streams to WAV files and displaying the number of connected users. The professional version offers additional capabilities such as custom banner displays and integration with Zulu DJ Software for live mix streaming. System requirements specify Windows 7/8/8.1/10/11, with older versions compatible with earlier Windows OS releases. The application is designed for internet radio broadcasting, podcasting, and sharing live events, providing a direct method for **audio distribution** to a global audience without complex setup.