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An halo stack antenna for 70 cm by KR1ST

There are lots of good designs for matching transformers for receiving antennas. Make it yourself it's cheap and easy, and very high performance. This is the design used in the TRX-9 transformers.

Cheap AFSK TNC, APRS for everyone with arduino, BeRTOS and a STM32F100 chip by OM5AMX

Freeware remote control software for Kenwood TS-870 by EC4DFP

An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band by K5GP

Icomcontrol a controller program for the icom pcr1000.

The MCP-F6/F7 software facilitates memory channel and menu data creation for the Kenwood TH-F6A, TH-F7A, and TH-F7E transceivers. It operates on _Windows_ XP (SP3+), Vista (SP2+), Windows 7 (RTM+), Windows 8 (RTM+), Windows 8.1 (RTM+), Windows 10, and Windows 11. System requirements include a CPU faster than the OS recommendation, RAM exceeding the OS recommendation, and **2 MB** of free hard drive space. Display resolution must be XGA (1024 x 768) or higher. Connectivity to the transceiver requires an optional PG-4Y (RS-232) or KPG-22U (USB 2.0) programming cable. The KPG-22U cable necessitates a virtual COM port driver installation. The software supports COM1 through COM20 for RS-232 communication. Installation requires administrator privileges and involves executing "setup.exe" from the extracted MFX101.zip archive. Uninstallation is performed via the Control Panel's "Uninstall a program" function or by re-executing "setup.exe." Created data files are not removed during uninstallation and require manual deletion. The software version is **1.01**. DXZone Focus: Kenwood TH-F6 F7 | Memory Management | Windows | RS-232

40mm diameter grey PVC pipe with a length of 9.5cm

The Charles Gizmotchy high performance horizontal and vertical beam antennas. Two, Six, Ten and eleven meters antennas

The Screwdriver Antenna Memory (SAM) product is designed to enhance the mobile antenna commonly called the "Screw Driver". It replaces your current control unit and provides an automated memory feature that eliminates the visual coil tuning method commonly used.

Great resource wth reviews, articles, and other fun CB information.

Worldwide airports informations

Easy home brew 2 meter copper jpole antenna build - under 20 bucks - Hits repeaters 45 miles away. Parts used bought at home depot build time 1 hour.

Dual Band VHF/UHF Slim Jim Antenna project

An Antenna Rotator Project. The rotor design is based on sandwiching the gears and gear supports between two 5/16 inch 6061 T-6 aluminum plates

A base station antenna you can easily build for 146,220 or 440 MHz, with performance similar to a J-pole but smaller and less obstrusive

RTTY, Amtor, packtor, SSTV reference by WM2U

How to make a loading coil for the AD5X portable vertical antenna

Managing extensive amateur radio contact logs efficiently requires specialized software that integrates various operational aspects. Aether provides a macOS-native logging solution, designed from the ground up using Apple's Cocoa, to streamline QSO entry, organization, and retrieval for Mac users. It supports modern macOS technologies and offers an intuitive interface, aligning with the user experience expected on Apple platforms. The application includes features such as automatic dupe checking, which quickly identifies previous contacts with a station, and awards tracking, indicating if a new contact is needed for specific operating awards. Aether also integrates rig control via RS-232, automatically populating frequency, mode, and power data from supported Elecraft, Icom, Kenwood, Yaesu, and some TEN-TEC transceivers. This automation reduces manual entry errors and speeds up the logging process. Furthermore, Aether offers comprehensive QSL management, including synchronization with eQSL.cc and Logbook of The World, and the ability to print QSO detail and address labels for paper QSLs. It also incorporates automatic callbook lookup from sources like QRZ.com and HamQTH.com, and calculates distance and beam heading, with Google Maps integration for visualizing contact locations. Full ADIF and Cabrillo import/export capabilities ensure compatibility with other logging software and contest submission platforms.

A full line of single-channel synthesized and crystal controlled vhf and uhf fm receivers. Great for repeaters, telemetry, and control applications.

Informations about Scannings, with frequencies, information about scanning, hardware and software reviews

The page describes the construction of a simple omnidirectional, vertically-polarised dipole antenna for two metres using coaxial cable. It can be used indoors or outdoors, with no extravagant gain claims. The project is low-cost and can be completed in about 20 minutes.

HeyWhatsThat Path Profiler is an online useful tool to do a Line of Sight calculation between yourself and the another station

The RTL-SDR software by Osmocom, allow DVB-T dongles based on the Realtek RTL2832U to be used as a cheap SDR.

Vox Recorder is a Windows utility wich allows recording sound from an audio source only when an audio signal is present; its main purpose is to avoid the recording of the silence eventually present at the input.

Simple Homebrew HAM blog from indonesia

An homebrewed dipole antenna for 14MHz

G8ODE schema to reduce a half-size G5RV to 70 ft.

This web site represents the home of "Country Files", databases of entities (countries), prefixes and callsigns that are used by amateur radio logging software. There are three "flavors" of country files: CTY.DAT used by contest logging software such as CT, N1MM, NA, TR and Writelog DX4WIN.CTY used by the DX4WIN logging software WPXLOC.DAT used by packet cluster software such as AR-Cluster, CC Cluster and DX Spider maintained by Jim Reisert, AD1C

We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.

Stream is a software that implements MFSK16 and MFSK8 modes designed by me and Murray Greenman ZL1BPU. It also offers a series of experimental modes based on FEC, interleaving and several modulation techniques (PSK, QPSK, MSK).

PCE International Inc, towers and accessories

Constructing a Lindenblad antenna for 137MHz NOAA satellite reception involves specific design considerations for optimal performance. The resource details the use of 4mm galvanised steel fencing wire, 300-ohm television ribbon cable, and wood/plastic components for the antenna structure. Key dimensions for a 137.58MHz-resonant antenna are provided, derived from the ARRL Satellite Handbook, specifying s, l, w, and d as 42, 926, 893, and 654mm respectively. The antenna is designed for Right Hand Circularly Polarised (RHCP) signals, requiring the four folded dipole elements to be tilted clockwise by 30 degrees. A significant aspect covered is impedance matching between the antenna's 75-ohm impedance and a typical 50-ohm receiver input. A twelfth-wave matching transformer, constructed from 117mm sections of 50-ohm RG-58 and 75-ohm RG-59 coax with a 0.66 velocity factor, is described. The article also addresses coaxial cable and connector selection, recommending 75-ohm Type-N connectors for RG-6 cable in professional setups and F56/F59 connectors for general use, while strongly advising against PL-259/SO-259 connectors for VHF. Strategies for mitigating Radio Frequency Interference (RFI) are discussed, including antenna placement to shield from local TV transmitters and the use of commercial or DIY band-pass filters, such as cavity resonators or helical notch filters, along with ferrite chokes on coaxial cables. Antenna orientation is explored, noting the Lindenblad's 'cone of silence' directly overhead and its maximized sensitivity towards the horizon. An experimental vertical tilt of 90 degrees is presented as a method to improve overhead reception and reduce interference from strong horizontal signals, particularly relevant in high RFI environments like the Siding Spring Observatory site.

ComTekk Software Tone generator for 2-way radio signaling. Use sound card to generate CTCSS, DTMF, tone remote, ANI and more. Synthesizer for simulation and testing of 2-way radio systems, repeaters, remote control, ANI, Paging and more

Fiberglass and bamboo poles poles, pole mounts

An homemade portable vertical antenna with a trap near the mid point of the main element. The trap is made with 42mm diameter PVC pipe with 9 turns of wire on it

Homebrew a 2 meter 1/4 wave vertical antenna for the 146 mHz ham radio band

New and Used, Buy and Sell, Electronics, Communication and Radio Equipment and Manuals: General Electric, RCA, Motorola, Midland, Uniden, Vision mate electronics

Amateur radio shop based in germany, major supplier of wireless technology for ALINCO, Kenwood and ICOM.

Listen to Clearwater, Florida police including Pinellas County Fire, EMS as well as Pinellas County Sheriffs Department

"Low profile antennas for the ""ham"" radio user"

Interconnecting the YAesu FT-897 or 897D

Don't buy or build a semi-vertical trap antenna until you read this article! If you can use a drill, saw and screwdriver this is a simple project.

VHF, UHF, FM, Base & Mobile antennas

An assortment of Amateur Radio-related technical articles written for the JUG, the newsletter of the Northern California Contest Club. Topics include unique but simple and useful radio modifications and accessories, and rig reviews.

Over 200 Electronic Plans and Kits

The Homebase10 is a simple to make wire halo antenna for 10m (28MHz) built using parts available from the local DIY store.The resulting antenna is very effective on 10m despite its small size and light weight.

A Free windows, universal program for RIG control, can read and set mode and frequency on your transceiver. The program can control ICOM, Yaesu and Kenwood transceivers, by DXSoft

Russian page on IC-718 modifications

This page describes two modifications W8WWV made to his AL-1200 amplifier. The mods were obtained from Ameritron, so they are official.