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This article document a 2 element half wave collinear J-Pole antenna by KC9EOT and KB8OJH -
Ham Radio repair of all major brands and models, located in Carrollton, Texas, which is just north of Dallas, and have been serving the Amateur Radio community for over 20 years. -
Make your own interface, two schematics for building an interface using the RTS line by N3UR -
A 9:1 voltage unun using a T-200-2 powdered iron toroid core to feed a long wire multiband antenna. -
The silver springs radio club is the oldest amateur radio club serving ocala -
HB9DNU Karlheinz's blog, hosted on Blogger, presents a collection of personal reflections and observations, predominantly in German. The content spans various non-amateur radio subjects, including Swiss political initiatives, economic discussions concerning banks like UBS, and social commentary. For instance, an entry from February 2008 details the Swiss vote on a combat jet noise initiative, highlighting the debate between tourism concerns and national security. Another post from October 2008 critiques the 500 billion Euro bailout package for banks, calculating its per-capita cost for German citizens and referencing earlier blog entries from March 2006 and June 2007 that discussed UBS salaries and Raiffeisenbank issues. These entries often reflect Karlheinz's personal perspective on current events. The blog also includes lighter, more personal notes, such as a February 2009 entry about a video produced by his grandson, and observations on local events like a bird exhibition in Contone or a scenic train ride through the Centovalli, demonstrating a broad range of interests beyond the ham radio hobby. -
Drake unofficial, mods, tach support, classifieds, auctions -
Online ham radio practice exam by eHam, allow practice current exams but also old amateur radio exams based on old licence classes. -
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ARRL Audio News contains highlights taken from the League's weekly publication, The ARRL Letter. ARRL Audio News is available via internet in mp3. -
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Small and inexpensive homebrew HF radio 5W Output, CW SSB AM FM, DSP, Speech Processor, Sprectrum Scope, Watefall Display. mcHF is a small, home-brewed amateur radio project. Firmware is released as open source. -
Practical and usable direct conversion receiver for the 40 m CW band -
WM7D's FT100 resource page, dedicated to providing information about and resources for, the FT100 -
Article on a 2 and 6 meters halo antennas that does not require a mast has a very low part count and can easily be built with a minimum of tools. -
JT65 is a digital protocol intended for Amateur Radio communication with extremely weak signals. It was designed to optimize Earth-Moon-Earth (EME) contacts on the VHF bands, and conforms efficiently to the established standards and procedures for such QSOs. -
ST2NH blog - first ham blog from africa fatures QRP,Homebrew,news,links -
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Article on various type of transmissium medium, like parallel lines, twisted pairs, shielded pairs, coax lines -
APRSmap is a new APRS client software by OE5DXL, which is based on the OSM map source. It allows a lot of features in only one program by a good usability. NO installation is required, just put it on a disk an run it -
FREE specialized software in the detection and registration of echoes radio products by meteors shower, falling star, at the time of their gone in atmospheric. They are destined to all possessors of a radio and a computer, interested parties by this simple technique of radioastronomy. -
"QEX is the ARRL "Forum for communications experimenters." QEX is published bimonthly, it features technical articles, columns, and other items of interest to radio amateurs and communications professionals -
2 meter kilowatt linear amplifier -
Free memory backup/restore program for the Yaesu VR-5000 receiver. -
Wikipedia page about regenerative circuits in designing receivers. -
Homebrewing a mic boom headset for the Yaesu FT 897 and 857 transceivers -
If your doing any home brewing gear for ham radio its a great idea to have a dummy load. This will to your radio be the perfect antenna...it will never radiate but your radio sees a perfect 50 Ohm impedance. -
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Spanish ham radio shop with a complete amateur radio equipment offer -
Offer a wide range of homebrewing projects mainly for VHF UHF operations. From vhf antennas to preamplifiers, chargers and power supplies -
A bowtie antenna is a type of antenna that reputedly provides higher gain at lower radiation angles than a center-fed dipole antenna at heights considerably less than 1/2 wavelength above ground. -
AM-6154 222MHz grid Conversion Information by N0UK -
2,6 and 10 meters beacon located at Lake White, Ohio -
Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built. -
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allows a Macintosh computer to communicate via packet radio with the amateur packet satellites currently in operation using the 'PACSAT' protocols -
LIVE 911 audio of the Chicago Fire Department North & South channels. -
The website provides information on the Romanian Amateur Radio Federation's participation in the World Youth Radio Orienteering Championships in 2025. It includes details on the event, the participants, and their results. -
Treffpunkt Amateurfunk (German) -
An active receiving antenna for 10 KHz to 20 MHz, a very small sized antenna with excellent performances in noise to signal ratio. -
A 50-ohm 10W resistor forms the core of this portable QRP antenna, designed by _K0EMT_ for convenient operation on 160m and 80m. The construction involves soldering the resistor to a BNC connector, with one lead to ground and the other to the center conductor, then insulating the assembly. This minimalist design aims to provide a highly portable solution for low-band QRP operations, acknowledging the inherent trade-offs between antenna size and efficiency. Testing with an antenna analyzer revealed low SWR on both 160m and 80m, with a Yaesu FT-817 confirming good matching. While 40m and 30m showed higher SWR, the primary focus remains on the lower bands. The author successfully tested the antenna with **2.5W CW** output, demonstrating its practical application for QRP field operations where ease of deployment is paramount, even if it means sacrificing some **gain** compared to full-sized antennas. -
The Alaska Snipers Net was started back in the mid to late 1960's. It started out just as a group of people meeting to chat each evening. -
Does your Amateur Radio system comply to the EMI rules ? (German values implemented) -
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A Low -Power Indoor Portable HF Antenna by Monty Northrup, by N5ESE -
Construction details of a multiband dipole that can can operate at high power levels, and match its 50-ohm coax feedline without a tuner -
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IC820H or other Icom Radios Soundcard interface for VHF EME use by DF9CY