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

Build your own delta loop antenna for 6 meters band

Live streaming police scanner feed from Reno Nevada USA

Experimental omni-directional antennas for 6-meters band

Yagi Antennas, Antenna Materials and more.

Antenna masts, mounts, tripods and poles. Elevating solutions. Portable Antenna Masts

Maco Manufacturing, HF Antennas, gamma matches, cable assemblies, power supply, swr meters, watt meters

Kenwood, Icom, Yaesu, Sony, Uniden Bearcat, Wilson MARK II & IV

A 3 elements long yagi antenna for 6 meters band by ON6MU

Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.

My Sloopers antennas for 80 and 160 meters

How to build a to 1 balun by N1HFX

Images and technical details of thousands of transceivers, cb radios, rotators, rf amplifiers scanners and accessories, by SM0OFV

Pictures of 2.4 Ghz antennas, JN1GKZ S-band homemade antennas

DIY Basic Electronic Theory, Basic Antenna Theory with Antennas built from common materials. What does SWR really mean. Baluns from transmission line.

A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA

Constructing and designing full size, single band stacked yagi antenna arrays

SDR software for SoftRock40 freeware by Alex VE3NEA

How to select an antenna for scanning. This is a Readers Digest version of antennas, meant to give new users some idea of the different antennas and their good and bad points.

Article designed to answer basic questions about antennas

The _Astron RS35m Power Supply Schematic_ provides a detailed circuit diagram for this popular linear power supply, focusing on the rectifier and pass transistor stages. It presents the AC input and DC output sections, illustrating the component layout and interconnections critical for understanding its operation. The schematic is enhanced with specific annotations derived from the December 2005 QST "Hands-On Radio, Experiment #35 Power Supply Analysis." These notes offer insights into the circuit's functionality and potential analysis points, making the diagram more instructive than a bare schematic. The resource serves as a practical reference for hams interested in the internal workings or maintenance of the _Astron RS35m_ unit. This document specifically highlights the key components responsible for voltage regulation and current delivery.

80m to 23cm beam antennas, oscar antennas, and antenna rotors

Contain schematic diagram of many different radio, and some operations instructions.

Live streaming audio of Ontario Police Department. Super clean receive and high quality audio.

The finest in VHF/UHF antennas for Amateur and Commercial Applications. Antennas and Repeater Controller Accessories includes Rutland Arrays.

Listen to the Baltimore County Maryland Police Live Scanner Radio Feed.

What is the best balcony antenna? what antenna would you recommend for use on typical hotel balcony? Read some answers here

EasyPal is a sophisticated digital Slow-Scan Television (SSTV) application that utilizes soundcard technology to encode and decode SSTV signals. Developed by the late Erik Sundstrup (VK4AES SK), this software has evolved into a versatile communication tool for amateur radio operators, extending beyond basic image transmission capabilities. EasyPal implements Digital Radio Mondiale (DRM) encoding technology, enabling efficient data transmission over narrow 2.5 KHz channels on both HF and VHF frequencies with remarkable speed. The application supports multiple file formats, including jpg, pdf, txt, doc, and xls, as well as specialized forms such as ICS-213 and ICS-213 (ARES). Additionally, EasyPal offers email functionality through designated repeater stations with internet access. Its responsive development history and robust feature set have established it as a premier digital SSTV solution in the amateur radio community, though users of Windows 11 should note specific configuration requirements to ensure optimal performance.

Listen to the Montgomery County Police Live Scanner Radio Feed.

Demonstrates _EasyLog_, a commercial logging software for Windows, first released in 1989. The software automates QSO logging, manages awards, and integrates with LoTW for credit submission. It features powerful and intuitive award management, seamless DX-Cluster integration, and a reliable country recognition system, supporting over **37 years** of continuous development. EasyLog provides dedicated technical support and regular updates for awards and DXCC country recognition. Users gain 12 months of access to all software versions and Manager updates with each purchase or renewal, with an option for 13 months upon early renewal. This tool transforms station management, freeing operators from repetitive tasks and enhancing the overall radio experience for both new and experienced DXers. The software is priced at **39,95€** for new users, including 12 months of updates.

High performance RTTY reception and transmission software, need a Sound Blaster compatible sound card.

HF VHF/UHF yagi and quad antennas, towers and headphones manufactured in holland

Arrl document about invisible antennas and indoor systems. It is important to consider that few compromise antennas are capable of delivering the performance one can expect from the full-size variety. But the patient and skillful operator can often do as well as some fellows who are equipped with high power and full-size antennas. The "cliff-dweller" may not be able to "bore a hole" in the band as often, and as easily, but DX can be worked successfully when band conditions are suitable.

Some practical indoor antennas that can be built by anyone

The directory lists several files, including `_template1.html` and `_template2.html`, last modified in 2006 and 2004 respectively, indicating a historical web project. Key scripts like `hfcc_cfm.pl` and `index.cgi`, updated in 2011, suggest a **CGI-based application** for searching shortwave broadcast schedules. The presence of `_template1.tpl` and `_template2.tpl`, both modified in 2015, points to a templating system for dynamic content generation. The file `hfcc_create-fill_mys..>` (likely `hfcc_create-fill_mysql.pl`) implies interaction with a database, possibly MySQL, for storing and retrieving **HFCC (High Frequency Co-ordination Conference)** schedule data. The `lang.cgi` script, last updated in 2002, suggests early support for multilingual interfaces or language-specific content delivery. The `q.txt` file, a small 804-byte text file, could be a query log or a simple data file. The overall structure indicates a system designed to process and present shortwave broadcast information, likely by querying a database of scheduled transmissions on various HF frequencies. The file modification dates suggest the project was actively developed and maintained over a period spanning more than a decade, with core components last updated around 2011 and templates in 2015.

Visit the legendary FT-847 FAQ pages ! You'll find a huge knowledgebase especially for the Yaesu FT-847 Transceiver.

Measuring SWR and things every CB'er should know

Thierry LOMBRY, ON4SKY, develops in several long articles all you need to know about antennas, their design and performance, for both amateurs and SWL

Metropolitan Police Department - Washington, D.C.

This is a tracking page for a tv tuners based homebrew spectrum analyzer project.

Delta Loop Antenna for 15m band. This antenna is made for operating from outdoors, mainly from mobile shack. Drive to a parking you like, then build it up. Just half an hour later, you can enjoy slightly better gain than normal dipole.

U.S. Government's military handbook on grounding in pdf format

Another approach to hidden HF antennas

This antenna is easy to build and suitable for broadband work, satellite work and terrestrial work.

CW Skimmer 2.1 employs a high-sensitivity CW decoding algorithm based on Bayesian statistics, enabling simultaneous decoding of up to 700 CW signals within a receiver's passband on a 3-GHz P4 system when paired with a wideband receiver. The software features a fast waterfall display with sufficient resolution for visual Morse Code interpretation, automatically extracting and labeling callsigns on the waterfall traces. Extracted callsigns are exported as DX cluster spots via an integrated Telnet cluster server. The application includes a DSP processor with a noise blanker, AGC, and a variable-bandwidth CW filter, alongside an I/Q Recorder and player. It supports both 3 kHz radio passbands and wideband SDR receivers like SoftRock, RF Space SDR-IQ/SDR-14, SRL QuickSilver (QS1R), HPSDR Mercury, and Microtelecom Perseus. System requirements specify Windows XP/7/8/10 (32-bit or 64-bit), a Pentium-4 2.5 GHz for wideband operation or 1 GHz for 3-kHz radios, a COM port for CAT control, and a stereo sound card supporting 48 kHz sampling. It integrates with Elecraft KX3, Icom IC-7300/IC-7610, and Flex 6000 series radios, with documentation available for various setup configurations.

Some tens of very special audio files recorded during amateur radio activities like aurora traffic, meteor scatter, communications with ISS crew and the sound of various transmission modes that you can hear on HF and VHF bands

This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.

HF Vertical and Beam Antennas, antennas accessories by Butternut. Bencher is out ouf ham radio business. Recently company products has been sold to Vibroplex and DX Engenieering.

Listen to live scanner traffic from Santa Barbara, CA for Police, Fire, EMS, Sheriff, CHP.

Two types of home-brewed 12/20 Ampere 13,8volt power supplies, including detailed part lists by ON6MU