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Ham Radio Tower Project at N0HR. Includes site plan, escavation, tower construction, HF antennas, grounding and lightning protection, coax and more.

Repeater and linking control systems

Buy, sell, trade vacuum tubes

A delta loop antenna for 17 meters band include eznec antenna model file

Providing quality products to Amateur Radio Operators, morse keyers, portable paddle.

Details the offerings of Ham Buerger Inc., a company founded in 1965 to support the amateur radio community with communications products. The business provides a range of equipment, including Uniden Digital scanners, and maintains a section for equipment blow-out sales that feature professional 2-way radios and cell phones. Additionally, the company stocks hard-to-find NuTone products and provides repair services for most NuTone equipment. The site also references an Amateur Radio Band Plan and links to other ham radio resources, alongside a new product offering for RV and marine toilets, indicating a diversification beyond core amateur radio supplies.

Easy Quad calculator, enter center frequency to get a quad antenna size

Excel spreadsheet to input your old manual logbook data and have it converted to the ADIF format

In this designs G8ODE explains different methods to builds a choke balun

Picture and specifications for Yaesu VX-7R

Design your owm HF shiortened dipole. Includes a diagram of a lumped-constant loaded dipole antenna that is intended to fit in available space, rather than requiring a full 1/2 wavelength, at a specified frequency

Amateur Radio Icons collectio

Article on rhombic antennas, radiaton patterns, disvantages, and more info on rhombic aerials

Rigpix database large picture of the Yaesu FT-897

Displays map of the world, showing day and night areas.

AirMail is a HF radio mail program for sending and receiving messages via Pactor, either via the ham radio system or participating marine or commercial services

If your IC-706MKIIG will not power up without even hearing a relay click, check the state of the HV line.

The program calculates the actual position of the satellites using the NORAD 2LINE-element set, which is available via the Internet, for nearly all satellites. The position is then displayed in 3D-view as well as in 2D (mercator) view, where the footprints are also be shown.

Free Donwload of the PDF file of ITU and CQ zones of the world, made available by Icom America

FT857 Programming Software works with FT817 FT897 too. Demo version available.

This resource details the computer-optimized design of the _ZS6BKW_ multiband dipole, an evolution of the classic _G5RV_ antenna. It begins by referencing the original 1958 RSGB Bulletin article by Louis Varney G5RV, explaining the operational principles of the G5RV's flat-top and open-wire feedline on 20m and 40m, noting its impedance transformation characteristics for valve amplifiers of that era. The article then transitions to the rationale for optimizing the design for contemporary solid-state transceivers requiring a 50 Ohm match. The core of the project involves using computer modeling to determine optimal lengths for the flat-top and matching section, aiming for a VSWR of less than 2:1 on multiple HF bands. It discusses the process of calculating feedpoint impedance based on antenna length and frequency, referencing professional literature from Professor R.W.P. King at Harvard University. The analysis also considers the characteristic impedance (Z(O)) of the open-wire line, identifying a broad peak of adequate values between 275 and 400 Ohms. Specific design parameters for the improved ZS6BKW are presented, including a shorter flat-top and a longer matching section compared to the original G5RV, with a velocity factor of 0.85 for the 300 Ohm tape. The article confirms acceptable matches on 7, 14, 18, 24, and 28 MHz bands when erected horizontally at 13m, and also discusses performance in an inverted-V configuration, noting frequency shifts. The author, Brian Austin ZS6BKW, emphasizes the antenna's suitability for modern 50 Ohm coaxial cable without a balun.

ShipPlotter displays complete information about ships that are within VHF range of your position using the Universal Automatic Identification System (AIS).

JJ0DRC's HF multi-band delta loop antenna project, initially conceived during the waning peak of Cycle 23, addresses the common challenge of achieving effective DX operation from a small residential lot in Japan. Dissatisfied with a ground plane antenna's performance in SSB pile-ups, the author sought a beam-like solution without a tower, drawing inspiration from a JJ1VKL article in CQ Ham Radio Sep. 2000. The antenna, constructed in October 2000, employs two 7.2-meter fishing rods (37% carbon fiber, reinforced with cyano-acrylate glue and aluminum tape) and 1mm enameled wire, fed by an Icom AH-4 external antenna tuner. While the exact beam pattern remains unmeasured, JJ0DRC observed a significantly higher callback rate compared to dipole antennas, particularly on higher bands. The system's circumference length of 15-20m is crucial for maintaining a good beam pattern across HF bands, though performance on lower bands like 80m, 40m, and 30m becomes less directional as the length deviates from a full wavelength. Ongoing maintenance addressed degradation issues, including aluminum tape cracking and wire breakage at connection points due to strong winds (often exceeding 10-15m/s in winter). The author reinforced rod connections with IRECTOR PIPE SYSTEM components and INSU-ROCK ties, and improved wire attachment methods using Cremona rope and epoxy bond to enhance durability.

Using the FT-857 Microphone Jack for Serial Control (CAT)

US Amateur Radio Band Plans by ARRL

Built around a 1/2" pvc frame, Larry's 6 meter moxon antenna is made from #8 aluminum ground wire

Double bazooka antennas

"A collection of nearly all facts around the YAESU Musen products; products, company history and much more"

This antenna was designed to meet the requirements of a light body worn small magnetic loop covering all the frequencies continuously from 7 MHz to 29.4 MHz

Amateur Radio, Citizen's Band Radio, Commercial Radio, General Electronic items, Marine Radio, and Short Wave Radios, Hamilton Ohio

Build your own home made Antenna Analyzer with an arduino micro, or a cheeper one with a pic processor

HF pedestrian operation using loop antennas by PY1AHD

Improvements to Using the Heath SB-200 Linear on Six Meters by Ron Klimas, WZ1V

CwType v2.35 provides a dedicated terminal interface for **CW operators**, facilitating Morse code transmission from a Windows PC. Users can input characters via the keyboard or a connected paddle, supporting iambic keying. The software manages transceiver control, including PTT and CW keying, through COM or LPT ports. It offers adjustable speed, dash/dot ratio, and inter-letter spacing, with real-time speed display in LPM and WPM calculated by the "PARIS" method. The program includes features like MOX mode for automatic TX on/off, configurable weighting to compensate for transceiver element clipping, and programmable F-key macros for sending predefined text or special sequences. CwType can integrate with logging software such as AALog (V1.0.3 and later) for data transfer, and supports various character sets including English, Russian, and Swedish. A beacon mode is also available, executing the Alt-F12 macro periodically at a user-defined interval. Audio output for monitoring can be routed through the internal PC speaker or a sound card, with options for sine waveform and smooth envelope generation for SSB transmitters. The software is compatible with **Windows XP/Vista/7/8/10** and is distributed as freeware.

Eham IC-718 reviews

Guy wire sloper antenna suitable for the 10m band

Windows freeware database containing frequencies, locations, and a small logging program capable or recording audio

What do you do with a bunch of old computer power supplies?

The I0JXX is an italian company that offers market their projects, also sells electronic products of high quality, both for Ham, both Broadcast and their accessories. VHF Antennas, mosfet power amplifiers, filters, insulators, power dividers, telescopic poles, antenna masts

The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca)

A full duplex antenna system for 144 432 Mhz

CB distributor in the Netherlands since 20 years

Radio spectrum monitoring and analysis tools for industry and government

Overview, summary, tutorial about the log periodic antenna or aerial used for wideband RF antenna applications

W5JGV antenna tuner for 150 - 500 Khz band

Very strange morse keyers, like Onion chopper CW key, Handshake CW key, Chopsticks CW key, Typewriter CW keyboard, Refrigerator CW key by OH6DC

how to easy and quickly unsolder and recover electronic components from old electronic board (SMD and not) by iz7ath Talino

The ICOM IC-7300 is a cutting-edge HF transceiver that has garnered significant attention since its release. This review, published by ARRL in QST, provides an in-depth analysis of its features, performance, and usability. The IC-7300 is known for its direct sampling technology, which enhances its sensitivity and selectivity, making it a favorite among amateur radio operators. The review covers various aspects, including the user interface, audio quality, and overall operational capabilities, providing valuable insights for both new and experienced hams. In addition to its technical specifications, the review discusses the IC-7300's performance in real-world scenarios, such as DXing and contesting. It highlights the transceiver's ability to handle weak signals and its versatility across different modes. The review serves as a helpful guide for those considering the IC-7300 for their station, offering a balanced perspective on its strengths and potential drawbacks. Overall, this review is an essential resource for anyone interested in the ICOM IC-7300 and its place in the amateur radio landscape.

Remote Control Antenna Switch made with two circuits board

A scanner resource for the Dallas-Fort Worth Metroplex including trunk information and a live scanner feed.