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An engineering oriented organization specializing in the design and manufacture of high performance parabolic antennas, 3dB high power RF couplers, Antenna power splitters, directional RF couplers and more items for RF transmission from HF through Microwave frequencies.

W5USJ and BLT Z-Match Tuner Schematics

QRP Station in a Bag is a complete QRP station in an old laptop PC carrying case (photo). It is a true "Work in Progress" in that wd8rif is constantly changing the contents of the bag as learn what works and what doesn't.

Original drawing and design of a 4 and 7 elements yagi antenna for 50 Mhz

A Lindenblad Antenna for 145 MHz and 435 MHz with an integrated 50 MHz J-pole

MDS-HAM Amateur Radio Products help make operating easier with the Introduction of the RC-1-Y, and RC-1-M rotor control box. A digital rotor control box with a serial computer interface at an affordable price which is made in America.

Video demostrantion of N1MM contesting software use and configuration

Group with thousand of memebers focused on NVIS antenna

Ham radio antennas and electronics, specialized in 1/2 wave dipole, OCF dipole, windom, full wave loop, end fed, inverted L, portable end fed antenna, long wire, SWL antenna, fan dipole, multiband dipole, G5RV and military antennas.

A short dipole wire antenna for 40 meters band. It is a folded dipole that do not make use of coils and can be used either in horizontal or inverted V configuration

CB Radio and 10 meter Radio reviews & mods blog. Most articles are in Japanese

Comparison chart for low-band receiving antennas

If you are a ham and live in a modern urban or suburban development, putting up a highly visible antenna may make it difficult to stay friends with your neighbours.

QRP DIY and more

N1HFX article on adjustable voltage regulator

The document provides a comprehensive overview of baluns, which are devices used to connect balanced loads, like dipole antennas, to unbalanced inputs, such as coaxial cables. It covers various types of baluns, including voltage and current baluns, and their design, construction, and testing. The text discusses the importance of baluns in preventing RF currents on coax shields and their applications in Ham radio setups. It also includes practical advice on selecting and using baluns based on antenna impedance and power ratings, along with detailed performance evaluations and construction tips for different balun configurations.

Amateur radio operators frequently seek efficient methods for logging contacts, particularly during contests or DXing sessions where speed and accuracy are paramount. MiniLogBook addresses this need by providing a streamlined logging utility designed for Windows environments. The software facilitates rapid entry of QSO data, offering an automated lookup feature for previous contacts based on recent callsigns, which significantly reduces redundant data entry. The application's distinctive utility lies in its integration capabilities with other ham radio software, specifically _MRP40_. Users can select text within the MRP40 receive window and, with a double-click, automatically insert that text into MiniLogBook. This feature is particularly advantageous for operators engaged in digital modes like RTTY or PSK, where copying callsigns and exchange information accurately and quickly is critical. The tool aims to simplify the logging workflow, allowing operators to focus more on the contact itself rather than manual data transcription. While primarily a logging tool, its focus on quick entry and interoperability with specific third-party software distinguishes it from more feature-rich logging suites. The software is distributed as freeware by _Polar Electric_, making it accessible without cost. Its small footprint and direct functionality cater to operators who prefer a minimalist approach to logging, prioritizing efficiency over extensive database management or advanced reporting features.

3 Element reversable quad antenna for 40 meters band

Let's explore the cubical quad antenna, or quad, and see what it really is and how it really works by w8ji

This document details the design and construction of a Vinecom 6N4 dual-band Yagi antenna for the 50MHz (6-meter) and 70MHz (4-meter) amateur radio bands. The antenna features 9 total elements (4 elements for 50MHz, 5 elements for 70MHz) on a 4.236-meter aluminum boom. Computer simulations using MMANA software predict 7.21 dBd gain on both bands with front-to-back ratios of 16.01dB (6m) and 15.37dB (4m). The design uses 12.7mm diameter elements mounted on a 32mm square boom, weighing 5.7kg total. Practical measurements with an MFJ-269 analyzer confirmed good SWR performance across both bands after element length adjustments.

The sonoma county radio amateurs invite you to attend our next monthly meeting or check into the tuesday night scra net on the 146.985 repeater at 7 pm.

Examines various facets of online casino gaming, focusing on security, game selection, and payment solutions. It details the extensive gaming libraries offered by online casinos, which often feature over **4,500 games** from more than _75 top software providers_, including slots, live dealer games, and table games. The resource also covers stringent security standards, such as 256-bit SSL encryption and dual licensing from authorities like the _Malta Gaming Authority_, ensuring player fund segregation and data protection. Furthermore, the content explores diverse financial solutions, including traditional methods like Visa/Mastercard and modern options like Skrill, Neteller, and cryptocurrencies such as Bitcoin, with withdrawal times ranging from **0-6 hours** for e-wallets. It highlights mobile gaming experiences optimized for various devices using HTML5 technology, offering over 4,000 mobile-optimized games. The resource also delves into VIP rewards programs, loyalty benefits, and customer support channels, emphasizing quick response times.

C Band Transverter for 5668 - 434MHz

This program is for downloading, uploading the memory channels and various settings on the TS-2000(X)/B2000. To write data to or read the data from the TS-2000(X)/B2000 memory, an RS-232C straight cable is required. Runs on Windows 98.

Automatic band decoder, six way antenna relay, band reject coaxial stubs and more. Top Ten Devices is a two-man company formed in 1991 by N3RD and W2VJN.

Some antenna manufacturers place baluns at the incorrect location in LPDA arrays. If we consider what the balun does we can see how the mistake occurs.

AP Communications CB and Amatuer Electronics Sales

by LA8OKA Martin Storli

Scanning information and frequencies by Clay Irving N2VKG

Manuf RF power amplifiers wideband+narrowband for Commercial, Defense, OEM and amatuer markets. Also low-noise rf amplifiers

The Daily DX is a text DX bulletin sent via e-mail. To subscribe you have to pay for the daily or weekly subcription and you will receive DX news to your home or office by e-mail Monday through Friday, 50 weeks per year. Includes DX news, IOTA news, QSN reports, QSL information, a DX Calendar, propagation forecast and much, much more.

67 ft antenna for portable operation by VE3CLQ

This is an incredibly simple and cheap frequency counter with binary readout, based on the ideas of Onno PA2OHH.

Replicating vintage radio components addresses the challenge of restoring classic receivers and transmitters to their original aesthetic and functional condition. Many historical radios, particularly those from the _Golden Age of Radio_ (1920s-1940s), suffer from brittle or missing control knobs and trim pieces, making authentic restoration difficult. This resource focuses on manufacturing new parts that precisely match the originals, ensuring period-correct repairs. The service offers a vast catalog of reproduced items, with thousands of molds created since 1987. This extensive inventory includes a wide spectrum of knobs and pushbuttons, along with some plastic escutcheons, grills, and handles. The meticulous reproduction process ensures that restorers can find accurate replacements for brands like Philco, Collins, and Atwater Kent, preserving the historical integrity of these valuable pieces of radio history. The owner, Larry Bordonaro, has been in business since 1987, demonstrating deep experience in this niche.

Morse Machine is a tool for learning to read Morse at a good speed, based on the Koch Method

Satellite Antennas for LOE Satellites

Icom IC-7000 product review

Amateur Radio Memory Manager Software for the Mac support many Yaesu Icom AOR and Kenwood radios

CI-V OCX For The Icom 756Pro allow you to interface your own application or visual basic, excel, word or similar custom applications to your icom radio.

DJ-X3 Memory Management Utility - Edit Memory Bank channels (700). Upload / Download, Load / Save Memory Bank channel data, Full / Partial Reset of radio.

AirNav live. See live images from my AirNav Radar box here in Clacton on Sea, Essex. Also full setup details.

YF1AR multiband vertical antenna, based on orginal concept by VE7BS. Consist of 6 vertical elements and 6 base radials with a single 50 Ohm feed line.

Pipe your signals to 146 and 445 MHz with one antenna!

Eham members product reviews of Icom IC-746

Problems using the tuner interface in the ICOM IC7000

A 2W 80 meters transceiver assembled into a toaster case.

This article provides a basis to brew your own emergency power pack depending on your needs and tastes.

Operating on 160 meters from a city lot is always a challenge. Here's how K9YC does it.

5 elements Yagi antenna with an 8.7 db gain

A 9:1 voltage unun using a T-200-2 powdered iron toroid core to feed a long wire multiband antenna.