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El Taller NP4KT ex WP4DQK ham radio blog

The VersaBeacon is a frequency agile, modulation agile RF source using a DDS chip and minimal support circuitry. It covers a frequency span of 1MHz to 150MHz in 1 Hz steps and provides a variety of modulations

HF VHF UHF antenna ideas to be used for field days. All antennas are quick to set up and take down and offer proven performance and flexibility. Presentation offered by Mahoning Country ARES

160-10 Meters 1500 Watt Amp - W4NFR

Display and Send Hellschreiber On Your iPhone and iPad - iPhone / iPad app to send and receive Hellschreiber

A postage-stamp-sized DSP microcontroller imbedded in the TNC-X eliminates the dedicated laptop or PC.

For amateur radio operators focused on **county hunting** awards, WD8LQB CountyLog offers a specialized logging solution for Windows. This software facilitates the logging of contacts specifically by county, a critical feature for those pursuing awards like the USA Counties Award. It includes functionality to export log data in **ADIF** format, ensuring compatibility with other logging programs and award submission systems. The program also provides access to the "Who's on the Air Database," a valuable resource for identifying active stations and planning county-specific operations. WD8LQB CountyLog is available in both a free limited version and a commercial version, allowing operators to choose based on their operational needs and budget. Its design prioritizes ease of use for county-focused logging, streamlining the process of recording contacts and managing the necessary data for award applications. The software's ability to integrate with external databases enhances its utility for real-time operational planning and post-contact verification.

A different implementation of the G7FEK HF multiband antenna with some adjustments and modifications

This application allows Ham Radio Operator to browse and search his LoTW QSL confirmations on his handheld device, and receive notifications when new QSL confirmations appear on Logbook of the World.

Homebrew Amateur Radio 440Mhz Interdigital Bandpass Filter

Listen to Cleveland Police Dispatch and Metro Housing Authority via the Live Audio Feed Web Player

A selection of speakers or headphones for use with amateur radio equipment. Includes an interesting paragraph comparing Dynamic and Electret Condenser Microphones, but also about audio Equalization.

The radio website that respects the Civil Air Patrol and their copyrights. Home of the world's largest radio/scanner frequency database, include live police scanner recordings

Strictly Ham has a large retail presence in Australia and welcomes enquiries from New Zealand, the Pacific and Asia. Strictly Ham offers a comprehensive range of high quality Amateur, CB and Marine products at very competitive prices.

Youtube video by PR7VX using AMTOR to test performance

Since 1956, E-Z-Hook has been manufacturing electronic test accessories used for test and measurement purposes throughout multiple industries. Test probes, multimeters, coax cables, adapters

A small (FT-817) I.F. radio driving a 100w transverter with a 1db nf front end.

Aggregating real-time contest scores, this online scoreboard serves as a central hub for participants and spectators to monitor live progress during amateur radio competitions. It directly interfaces with widely used contest logging programs, collecting score data as operators make contacts. The platform then processes and displays these scores on dedicated contest pages, offering an immediate overview of standings. Supporting a diverse range of **DX contests**, the system accommodates various operating modes and rulesets. It facilitates score tracking for events like the YB DX RTTY, RSGB Commonwealth (BERU), EA PSK63, and the South America 10 Meter contest, among others. This functionality allows contesters to gauge their performance against competitors instantaneously, fostering dynamic participation. The scoreboard's integration with multiple contest log software applications ensures broad compatibility, making it accessible to a significant portion of the contesting community. It provides a crucial service by centralizing score visibility, enhancing the competitive experience for **amateur radio operators** worldwide.

This article was first published in CQ-TV issue 208. Author try to explain digital television in layman's terms and without getting too involved in mathematics.

KC5M frequency measurement with yaesu ft-920

Understanding Amateur Radio NVIS Antennas and Propagation

A Personal Museum of Military Radios - Spy Radios - Tubes by Antonio Fucci

A collection of calculators from everything RF for various applications VSWR, attenuator resistance valies, microstrip, coax, unit conversions and many more.

NRSC AM bandwidth measurements with the loop antenna

A simple drawing schematic of a portable field dipole for 14 MHz with dimensions in meters and instruction for setting up the antenna and to store the radial for easy transportation

Calculate how to set call signs

Review of the LDG AT600 Pro antenna tuner by AE5X

This project is a Software Defined Radio Receiver. It has a frequency range of 24MHz 1.2GHz. It can demodulate AM, FM, USB, LSB with selectable bandwidths of 600, 2400, 2800, 3200 and 6400Hz. Using a simple RTL-SDR Dongle and Raspberry Pi 3 computer using GNU RADIO

A Tape Measure Beam Antenna for Radio Direction Finding based on WB2HOL design.

A website for those who also enjoy Morse code telegraphy and the keys that make it.

Killing RFI from your PC without turning it off

Coax Cables and RF connectors dealer in Germany

Ten-Tec Orion II picture and specifications at RigPix

FTDX 5000 product page with related accessories

Industrial and Commercial Parts Supply Since 1946

Essentially, a choke balun is designed to 'divorce' your antenna from the feed line. if your feed line is coaxial cable then you don't want it to be part of your antenna. you want to be able to deliver all your power to the radiator itself, i.e. 'the antenna'. a choke balun does this admirably

A Microvert antenna by KD5RVX based on the original microvert concept by DL7PE. PDF includes a 20 foot portable PVC tower project

for those times when you have a 28v relay, but want to use it with a 12v source

4 Square K9AY Array project for 80 and 40 meters band

Ted Freitas Fresno, California, United States

We offer all kind of promotional products such as award plaques, trophies, sports trophies, logo apparel, acrylic awards, acrylic plaques, executive awards.

A 7 dB directional gain is reported for this portable VHF Yagi antenna design, which utilizes cut metal tape measure sections for its elements. The resource details the construction process for a 2-meter band antenna, emphasizing its ease of build and portability. It specifically mentions the design's suitability for radio direction finding (RDF), fox hunting, and communication with satellites and the International Space Station (ISS), highlighting its practical applications for amateur radio operators. The construction cost is estimated at under $20, with potential for even lower expense if salvaged materials like old tape measures and PVC pipes are used. The article references _Joe Leggio's_ (WB2HOL) original design, noting specific alterations made by the author. It also compares this design to other DIY Yagi antennas, including _FN64's_ 2-meter band and _manuka's_ 70-cm band tape measure Yagis, underscoring its unique combination of simplicity, portability, and effective performance with a 1:1 SWR achievable on the 2-meter band.

N4MZ Serve the southern part of Baldwin County, Alabama from I-10 to the Gulf Coast and the Eastern shore of Mobile Bay to Florida.

Caig labs - featuring advanced contact cleaners deoxit, deoxit gold (progold) and deoxit faderlube (cailube mcl) for manufacturing, maintenance and service.

Article about interfacing Ham Radio Deluxe software to Icom IC-7610 transceiver. Article explain how to customize CI-V Address value, and how to properly connect the PC to the IC-7610 USB ports. Include videos and links to drivers.

A blod dedicated to SDR and RTL-SDR featuring sdr new and product reviews

If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.

Custom transformers by Mr. Dahl has been designing specialty transformers and reactors for over 35 years, and has been a licensed Ham radio operator, K0BIT, since 1955.

This article is about a 4 element yagi VHF antenna designed to be easy to be assembled and suited for portable operations