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Homemade 40 through 6 meter HF portable multiband antenna, an aluminium antenna construction article, with plan, drawings and photos

All about baluns with photos, projects and instructions, by IZ7ATH

SSTV freeware software for Windows by Mako JE3HHT. MMSTV is a free software application designed for transmitting and receiving SSTV (Slow Scan Television) images over HF bands. It allows radio amateurs to share still pictures using sound-card interfaces and a transceiver. The program supports popular SSTV modes (Martin, Scottie, Robot, etc.), real-time RX/TX monitoring, and easy image editing. Its user-friendly interface and reliability make MMSTV a favorite choice among ham operators worldwide. Ideal for showcasing QSL cards, shack photos, or technical diagrams over the ai An excellent SSTV program that requires only a computer with soundcard, no expensive TNC required. Works on all Windows version including Windows XP, Vista and Windows 7.

Photos and comments on building an helical antenna for wifi

Large colletion of antique radios with details and photos

Over 16.7 million callsigns are indexed within the HamCall World-Wide Callsign Database, a long-standing resource for amateur radio operators. This online tool facilitates rapid lookups of callsign data, including operator details and QSL photos, which are crucial for confirming contacts and pursuing operating awards. The database integrates FCC updates as they are released, ensuring timely access to current licensing information. The platform also features a live **DX cluster** displaying recent spots across various bands, from 160m to 3cm, with specific spot counts for active bands like 15m (50 spots) and 10m (46 spots). Users can view **band activity** summaries, providing an immediate overview of propagation conditions and active frequencies. Additionally, the service provides access to a hamfest calendar and amateur radio news updates, making it a multi-faceted resource for daily operating and event planning. Since 1989, the HamCall DVD has supported this server, alongside HamCall.net Gold Memberships, demonstrating a sustained commitment to providing comprehensive callsign data.

A well documented plan to build a magnetic loop antenna for Shortwave Listening, includes photos and diagrams.

Types of beverage wires, choose best supports and insulators, multiple antennas at one feedpoint, all well documented with photos and exaustive explanation. This article offers insights on building Beverage antennas for optimal reception. Key takeaways include using strong wire (copperweld or electric fence), proper termination, and a good grounding system (multiple copper rods). The author recommends maximizing antenna length and orienting it towards desired stations. For best results, utilize an antenna tuner and experiment with termination resistors.

Normal mode helix antennas for HF mobile. Photos andn plan for a 20 meters mobile helix antenna by N2MH

Plans, photos, electrical and mechanical design for this HF Log periodic antenna.

CB radio's catalog with photos and features, in czech.

Dchematics and photos of a secure power supply (short-cut, Rf feedback, high voltage etc.) by iz7ath

The page provides detailed instructions on how to build a double bazooka antenna for the 40 meters band. It includes information on materials needed, measurements, and assembly steps. The antenna can be configured as an extended dipole or an inverted V, offering low noise, wide bandwidth, and a 1:1 standing wave ratio. The content also offers calculations for other bands and includes photos of the antenna fabrication process.

Download a 6 meter moxon antenna, drawings, photos, plots by Allen Baker KG4JJH, (10 Mb!)

What is hallicrafters? Let these photos illustrate the soul of hallicrafters. by LA5KI

In this site SWL can find many thing he needs: Contest rules and results, software, awards info and photos, forums, chat and more.

Detailed pictures of Titan DX

Various tests and designs, with photos of home made EH Antennas,simple and networked, and also sone CAN Antennas.

This page includes fatures, specifications options and photos of the ICOM IC-746

The RigPix database entry provides a comprehensive technical overview of the Icom IC-746 amateur HF/VHF transceiver, detailing its operational parameters and physical characteristics. It specifies the transmit frequency ranges across 10-160 meters plus WARC bands, 50-54 MHz, and 144-146/148 MHz, alongside receive coverage from 0.03-60 MHz and 108-174 MHz. The resource outlines supported modes including AM, FM, SSB, CW, and RTTY, noting a tuning step resolution down to 1 Hz and a frequency stability of ±5 ppm. Key electrical specifications are presented, such as a 13.8 VDC power supply requirement, current drain figures for RX (1.8-2 A) and TX (Max 20 A), and RF output power ranging from 5-40 W for AM and 5-100 W for FM, SSB (PEP), and CW. The entry details the triple conversion superheterodyne receiver system, listing IF frequencies at 69.01 MHz, 9.01 MHz, and 455 KHz, along with sensitivity ratings for various modes and bands. Transmitter section specifics include modulation systems and spurious emission levels. Additional features like a built-in auto ATU, electronic keyer, simple spectrum scope, DSP, and CI-V computer control are noted. The page also lists related documents, modifications, and an extensive array of optional accessories, including various filters, microphones, and external tuners, providing a complete profile of the IC-746.

Presents the design and construction of the OK2FJ Bigatas, a portable, automatically tuned vertical antenna covering 80 through 10 meters. It details two distinct control systems: one utilizing BCD band data from Yaesu FT-857/897 transceivers, and another employing voltage level sensing for the Yaesu FT-817. The resource provides specific instructions for building the antenna's radiating element, loading coil with switchable taps, and the control circuitry, emphasizing the use of readily available components. The article outlines the physical construction of the antenna, including the use of duralumin tubes for the radiator and a PVC tube for the coil form. It specifies coil winding details, tap points, and the integration of radial wires for ground plane operation. The control electronics section provides schematics and component lists for both the BCD decoder (using a 74LS42 IC) and the voltage comparator (using an _LM3914_ bargraph driver), enabling rapid, automatic band switching without the minute-long tuning delays common in other systems. Crucially, the antenna achieves rapid band changes, with typical SWR values centered on common operating segments, such as **3.7 MHz** for 80m SSB. It also discusses modifications for CW operation on 80m and the trade-offs between antenna efficiency and full-range automatic tuning on higher HF bands, where manual adjustment of radiator length is suggested for optimal performance on 15m, 12m, and 10m. The resource includes construction photos and a discussion of cable requirements for reliable operation.

HF pedestrian operation using loop antennas by PY1AHD

Pictures, photos, source code and plans to build a logging frequency counter

QRPPAL, developed by WB2QAP, functions as a freeware QRP logging application for Windows 3.1 and Windows 95, initially introduced at the 1996 Dayton Hamvention FDIM QRP symposium. The software integrates the original "Logger" program, which was specifically designed for ARCI contest dupe checking and logging, alongside versions tailored for NW-QRP, MI-QRP Club, and Colorado QRP Club contests. It is distributed as a self-extracting archive, _qrppal!.exe_, approximately 1.2 MB in size, which unpacks _qrppal.exe_ and _setup.exe_ for installation. The program's modular design incorporates extensive QRP-centric databases, covering ARCI awards, QRP club listings, QRP periodicals, kit/vendor directories, and detailed rig reviews, often with photos. Noted reviewer Bob Gobrick, _VO1DRB_, described it as a "QRP Internet Web Site in a box" due to its comprehensive data modules, which are also user-modifiable. Installation involves running _setup.exe_ to create batch files like _setup95.bat_, which then establish a c:\qrppal directory and deploy the program files. Users initiate the application by typing "qrp pal.tkn" after setup. The Colorado QRP Club contest version should be avoided due to specific first name exchange requirements not supported by that module.

Club information, photos, utilities, links and repeater list. In Spanish

103 Amateur Radio photos taken at the Dayton Hamvention in May 1997

A clear description, with photos, for widebanding the FT-817nd.

Universal radio IC-V8000 page includes accessories and photos

Standard time zone map of the world in a jpeg file

SSTV pictures received from MIR via Slow Scan TV, by WB8ERJ Mike.

Cobalt Pet is a weblog focusing on shortwave radio. It features shortwave reception reports, product reviews, photos, listening tips, and links. International broadcasters and amateur / ham radio operators are monitored and discussed.

SecondHandRadio.com provides a platform for the amateur radio community to buy, sell, and swap used, surplus, and obsolete electronics and electrical equipment. The site facilitates transactions for a wide range of items, including ham radio transceivers, test equipment, shortwave receivers, antennas, and vintage radio components like tubes. Users can place classified advertisements with photos at no cost, catering to individuals, radio clubs, and commercial dealers seeking to liquidate or acquire gear. The platform emphasizes ease of use with a straightforward sign-up process and no associated fees or commissions for listing or selling items. It positions itself as a primary resource for used electronics within the USA, fostering a direct connection between sellers and buyers without intermediary charges. The service supports various categories beyond amateur radio, extending to military radios and antique equipment, thus serving a broad spectrum of radio enthusiasts and collectors.

T2FD A practical construction article, which first appeared in the Electronic DX Press, contains a number of useful photos and detailed instruction to build this antenna by VK3BVW

Demonstrates the construction and implementation of a **two-element phased vertical array** for 40 meters, utilizing _Christman phasing_ techniques. The author, W4NFR, details the process from building individual 1/4-wave aluminum verticals to integrating them into a phased system. The resource covers antenna spacing of 32 feet, elevated radial design, and the critical steps for tuning each vertical to achieve a 1.1:1 SWR before combining them. It also provides insights into calculating precise coax lengths for feedlines and the phasing delay line, emphasizing the use of an MFJ-269 Antenna Analyzer for verification. The finished system exhibits good front-to-back nulls, with an overall SWR ranging from 1.6:1 to 2.2:1, which is managed by an antenna tuner. The project includes detailed photos of the relay box, showing 12 VDC relays capable of handling 5KV, and the control box in the shack for switching between three different antenna pattern configurations. Static bleed-off chokes are incorporated for protection, and the construction emphasizes robust weatherproofing for outdoor elements.

Color photos, schematic and diagrams for an article written by N2APB for Fall 2000 QRPp. Also the subject of a presentation made at the Pacificon QRP Forum in October 2000.An Integrated and Portable PSK Station for 80 & 20 without using a PC!

A site dedicated for the AM Radio Amateur and vintage radio. Home of the AM Press/Exchange, The AM Forum (the largest BBS of it's kind),and The AM Classifieds, Photos, Audio, and technical information. Audio and Video chat rooms.

Italian site, for antique radios, with photos, collections, technical and forum

VHF, ms, aurora, es, photos, audio, link, soft and more.

Ham radio site devoted to classic collectible amateur and military radios, featuring vintage ham radio color photos and commentary, free downloadable manuals and pamphlets and links for ham radio hobbyists.

Contest team 9A7A, basic info and photos about our activities

communication radio,CB'ers, DX'ers,photos and Qsls

Polish Callbook with search engine, QSL cards, photos and map generator.

These photos illustrate the basic steps in making a perfect solder joint on a p.c.b

Photos from around the world of perhaps the most famous QRP project ever created. Vintage 1970's and newer versions of the Tuna Tin Two are featured.

KP4AE webpages with photos and information about SSTV, from puerto rico.

colombian ham radio stations,radioaficionados colombianos,dx,qsl,photos,fotos

Welcome to SW2A special contest station, with photos, logs and results

Photos and description of an EAC R-390A

Homepage of 14Cpi055 Alain infos,Cpi News,qsl's & photos,radio links

Pictures and design plan of a 28 MHz - 70 MHz transverter 3Watts in - 8Watts out by 9A2SB