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This almost trivial circuit may be used to charge a pair of AA or AAA sized rechargeable battery cells from sunlight.

AC6V Amateur Radio Prefixes

Discussion group of amateur radio operators that operate ham radios from their bicycles.

One hundred and fifty words per minute (WPM) is a configurable speed setting in this online Morse code translator, which facilitates bidirectional conversion between plain text and **Continuous Wave (CW)**. Users can input text to generate corresponding Morse code, or enter Morse code using dots and dashes to receive a text translation. The tool supports various alphabets, including Latin, Cyrillic, Ukrainian, Hebrew, and Arabic, broadening its utility for international communication. The platform offers multiple output methods for the generated Morse code, including audible playback, visual flashing, and device vibration. Advanced configuration options allow for precise control over the sound's pitch (frequency), volume, and overall speed, including a **Farnsworth speed** setting. This flexibility enables users to customize the learning or communication experience to their specific needs. Additional features include the ability to save the generated Morse code audio as a WAV file and to create shareable links for messages, which can be sent with or without the accompanying text. The interface is entirely web-based, built with HTML5 and JavaScript, ensuring broad compatibility across modern browsers.

Used test equipment, used electronic test equipment, refurbished test equipment and other pre-owned electronic test and measurement equipment to buy or rent.

An effective multiband HF Vertical antenna, used as remote station antenna. Pictures and review of this vertical HF antenna by VK5SW

With all the wire you have out, you may run into a problem with static buildup on the antennas. This static may try to make its way into your receiver, causing you major problems and damage that can run into a lot of money.

Products for electronic production service repair and testing

Designing and constructing portable wire antennas for HF operations, this resource explores several configurations including the _foldback dipole_ for space-constrained setups and an inductively shortened dual-band dipole for 20m and 40m. It details the calculation of inductance for shortened elements, providing a Visual Basic 6.0 program screenshot that illustrates determining coil parameters like turns and length for a **25.5 uH** inductor. The document emphasizes practical considerations such as adjusting wire lengths for optimal SWR, noting that a dual-band dipole achieved SWR below 2:1 on both 20m and 40m, with careful adjustment bringing it under 1.5:1. Further, the resource describes a half-wave antenna matched with a coaxial stub, a method often referred to as the _Fuchskreis_ in German amateur radio circles, to transform the high feedpoint impedance to 50 Ohms. This monoband solution, for a 20m application, uses a stub length of **2.98m** (0.216 lambda multiplied by coax velocity factor) and a shorted stub of approximately 48cm. The coaxial stub design is highlighted for its resilience to ground proximity, allowing it to be rolled up or laid on the ground with minimal SWR impact, making it highly suitable for portable QRP operations.

Third-order Cauer filters can boost performance of multi-transmitter, multi-operator contest stations to the next level. The filters are practical and you don’t need expensive test equipment to align them.

Log Online for T02TT DX Pedition

Windows NDB searcg and log editor utility by VE3GOP

A post about the construction and measurements of a Resonant Feedline Dipole cut for the 10M band

Amateur Radio and SSTV Pasokon EZSSTV RAdio HAM Saw Proskan W95sstv Win95sstv Ham Software Radio MMSSTV shortwave listener Hamcomm interface Slow Scan Television Help with setting up SSTV website. G0HWC

VHF, UHF and Satellite Antennas for Government, Commercial and Amateur Radio Made in Nebraska USA

Modeling small 160 meter antennas, with a focus on the vertical H antenna

Relay substitution tutorial, power amplifier tuning and Technical Characteristics

The next generation of satellite tracking software for Windows. Free to use, need licence to save images and sessions.

Download the Yaesu VX-8R Cheat Sheet PDF File

A nice resource from AE5X John a QRP opertator

Ham radio shop for APRS digipeaters WX3in1, RPTC, GSM devices, SDR software defined radio producrsa, APRS trackers and GPS Receivers based in Poland

Radio Direction Finding products

Buy plastic sheet, plastic rod, plastic tubing, bar, tube and plastic film from professional plastics. buy plastic materials online

This graphics-intensive program designs and analyzes active quadrature ("90-degree") networks for use in SSB transmitters and receivers.

Tips on winding wire coils used as inductive loads, traps, band-pass filters, are implemented in a number of amateur radio projects especially antenna projects

The Windows program for designing and analyzing PI and PI-L networks by Tonne Software

The Australian MW Club, free membership, for MW DX monitoring hobbyists resident in Australia. Founded August 2001

Yaesu FTDX3000 Sound card digital modes setup using internal USB interface

Shortwave listener blog from near Rome Italy

70 MHz transverter, 4m band, by G3XBM

Japanese electronic parts online shop offer a wide range of products, from microchip pic to leds and batteries to any kind of connectors

A Slim Jim Antenna project

Kenwood TS-590S features, accessories, specifications and details

Amateur radio links providing information sources for DX, QSL, Clubs, etc.

Pioneer supplier in the radio parts field, and electronic components, alternative power products, kits, test equipment and computer components.

Specializing in vintage and antique speaker repair,recone and restoration.

Article by N6LF on a top band vertical antenna array system

If you're driving around town listening to the buzz and engine whine blues, pick up this free pub and help yourself enjoy the music. Includes troubleshooting techniques and helpful hints.

Antennas, Standard Delay Line Systems, Crossfire Phasing or Hybrids

ECONCO has been rebuilding vacuum tubes for more than 30 years. Our commitment to quality, and concern for the environment has won us the acclaim of clients worldwide.

A group to discuss the Yaesu VX-2R handheld managed by N2ZZ

A 1200 baud Baycom modem schematic by SP3EJJ

Ham Manuals for sale

Meinberg NTP software to sync your computer clock. NTP client package with IPv4 IPv6 support for Windows XP and newer.

Alltronics was founded in july 1978 and is in the business of selling and buying electronic components and equipment.

Amateur Radio - Antenna Zoning Book by Fred Hopengarten Telecommunications Lawyer

My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation

Review of Cushcraft MA-5B multiband Antenna after some days of usage.

An antique radio collection

WSJT manuals and user guides in many languages. Most of these manuals are outdated and refers to legacy versions.