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RadioReference.com, scanner frequency and radio communications reference source, with complete conventional frequency assignments, trunked radio system information, frequencies, and talkgroups, FCC License assignments and maps, 10-Code Lists, agency maps, files, downloads, links, and detailed agency information for most public safety, military, and local government activities.

AEA Technology Inc. is a pioneer and leading manufacturer of RF and cable test equipment for the wireless, Telco, CATV, NMR & MRI, RFID, telemetry, aviation, commercial, military, and two-way radio industries. Produces SWR Meters, Pre Amplifiers, filters, power meters and antenna testing products

The G3TPW Cobwebb antenna covers five bands, 14 - 28 mhz, including the WARC bands

William Hepburn's Daily Tropospheric Ducting Forecast.

Pictures and homebrew instructions for this collinear 2.4 Ghz antenna

The Petlowany Three-Band Burner is a simple, low-cost, trapless short vertical antenna which amazingly works on three HF bands (20, 15 and 10 meters). This web page contains pictures, performance data, and enough construction details so you can homebrew your own.

Crossed yagi for 437 MHz Satellite antenna, with power divider splitter build.

SSTV software is now available for the Macintosh computers, for the first time.

Multimode suite, feature logging, Internet interface to CXCluster, Smart multi-mode controller software, contest, APRS, and PSK31 via Sound card. Free and Commercial version available.

With over 400,00 vacuum tubes in stock, ESRC is a major supplier of tubes for commercial and hobbyist purposes

Notes on building a basic wire vertical or horizontal antenna for 160 meters band by L. B. Cebik, W4RNL

Radio programming programs for YAESU and ICOM handheld transceivers. VX-7 Commander, VX-2 Commander, VX-5 Commander, VR-120 Commander, and IC-R2 Commander. All software on this site is designed to work on Windows 9x, ME, NT, 2K, and XP.

A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings

A moxon antenna for 28 MHz

BV is a professional software for QSL Management and Label/QSL Printing - developed since 1989 by Bernd, DF3CB. It is mainly designed for the contester and QSL manager with high QSL quantities but useful for all other QSL'ing purposes as well. Freeware

This is a picture of a schematic diagram of a multifunctional interface for Yaesu FT-8x7 Series Transceivers. It will work for Yaesu radios like FT-897 FT-857 FT-817

How to make a wifi cantenna using a mini ravioli can

HF Ham Radio mobile operation antennas manufacturer, W6HIQ, HA5CMG, VE7BOC, HF mobile antennas, screwdriver antenna, coils and filters.

Old Time Radios ! a good resource to old time-radio amataurs

A DIY discone antenna project made to improve receiveing performance of an RTLSDR receiver.

Standarda and Luxury QSL cards printer

17 Meter 3 element TA33 junior mono band yagi antenna conversion project by K6TC

Voice Shaper is a freeware windows speech pre-processor for SSB transceivers. It receives the voice signal from the microphone connected to the soundcard, and sends the processed audio back to the soundcard in real time by Alex Shovkoplyas, VE3NEA

SDR Software defined radio kits, genesis SDR kits

Program designed to do spectral analysis and real-time audio filtering on reception of audio signals for EME, VLF, SETI applications. Offer support for MTHELL, QRSS, DFCW, NDB, WSJT by I2PHD

A free application that captures DX and WWV spots from up to 5 internet clusters and a local packet cluster. DX Spots are merged and stored in a Spot Database on your PC, enabling you to monitor, sort, and filter them in real time; known LotW participants are highlighted, as are needed stations. WWV spots are plotted to show SFI, A, and K over the last solar revolution.

This page explains how to construct high-Q inductor coils.

Article and comparison between bazooka antennas and dipole, taking care of effieciency and bandwidth

N2DS home made loop page collection.

DXMaps.com presents a dynamic, real-time mapping service for amateur radio DX spots, integrating data from traditional DX clusters, _PSK Reporter_, and WSPR networks. The platform visually plots global QSO and SWL activity, enabling users to observe propagation conditions across various bands, from 2200m to >450 MHz. It offers distinct overlays such as the magnetic equator, gray line, moon footprint for EME, and VOACAP propagation predictions, providing a comprehensive view of radio wave behavior. The service allows granular filtering of displayed spots, including options to show only DX-Cluster data, PSK Reporter activity, or WSPR signals. Users can refine the map view by selecting specific bands (e.g., 160m, 20m, 6m, 2m), limiting spots to the last 15 minutes, or displaying only contacts exceeding **2600 km**. Additional features include the ability to toggle grid squares, aurora forecasts, and various amateur radio zones (CQ, ITU). Distinctively, the resource updates automatically every minute, ensuring current propagation intelligence without manual refresh. It also supports specialized views for EME, ionospheric scatter, and aircraft scatter, alongside FM DX and APRS activity. The platform emphasizes the importance of accurate locator information in DX spots to enhance data quality and offers a user manual and FAQ for guidance.

The **NW3Z** optimized wideband antenna designs, originally presented at Dayton 2001, detail Yagi configurations for the 20-meter, 15-meter, and 10-meter amateur radio bands. This resource provides access to the design files, likely containing critical parameters such as element spacing, element lengths, and boom dimensions, which are essential for replicating these directional antennas. The designs focus on achieving wide bandwidth, a desirable characteristic for contesters and DXers operating across a significant portion of each band. The content specifically references "nw3z-Antenna-DesignsDownload," indicating that the core information is available as a downloadable file, presumably in a format suitable for antenna modeling software or direct construction. Such files typically include **NEC models** or similar data, allowing for performance analysis and optimization before physical construction. The emphasis on "optimized wideband" suggests design considerations for SWR bandwidth and gain characteristics over a broader frequency range than typical narrow-band Yagis. The resource serves as a direct source for specific, proven antenna designs from a known amateur radio antenna designer, offering practical data for hams interested in building high-performance Yagi arrays for HF.

Allow you to create Tower Coverage Maps for any geographical area in the entire world. Maps are based on region and topography, taking into account for hills, mountains and trees. Commercial software allowing a free map trial

A homemade 16 foot falling derrick to tilt up a 50 foot high, 18 inch wide Glen Martin aluminum tower by N6RK

Standard diplexer design is based on singly-terminated Butterworth filters.

A free to download and print, amateur radio station log sheet in a paper US letter format

Cushcraft R5.pdf

2 element Yagi antanna plan from G3SYC

Kenwood TS-2000 Review

Tim Kirby IC-706 review of this small portable Icom transceiver

An open source software defined receiver for Linux, Free DSP and Windows

VA3STL experience on reorganizing his shack and setting up a new random lenght wire antenna for his Yaesu FRG-7 receiver

A small multiband antenna for vacation in french

Halo antenna for 4 meters band with dimensions, pictures and assembling instructions

Mobile antennas, how to install antennas in the roof of a vehicle and how tune antennas.

Antennas, books, rf parts, tubes,connectors and cables and many accessories at RF parts.

Quagi antenna design, this little windows application let you calculate dimensions of elements and spacing of a quagi antenna. Freeware by VE3SQB

Stacking and phasing HF and 6m arrays antenna switches and contesting devices. Custom low band antenna arrays, bandpass filters,commercial/Mil STd filters,microwave components, commercial broadcast filters.

The Adcock antenna has been used for a long time for RDF. It is basically an interferometer.

W3FF article about the buddistick portable vertical antenna in a PDF file

Design your own folded dipole antenna