Search results

Using moxon rectangles for WARC-Band antennas

N0KHQ Moxon rectangle for 17 meters, constructed from RG-58 coaxial cable

Why the G5RV is a good antenna on 75m and 40m

Developed by IZ3MEZ offer a click and show WW locator information using Google Maps API interface.

6m to 40m EndFed Half Wave Antenna project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use.

W1ZY's 40 Meter MOXON is the product of 9 months of experimentation. The final array is reversible and constructed from No. 12 insulated wire fed through two RF current baluns

Theory, Modeling, and Practical Applications By W5JCK, presentation in PDF File. This presentation focuses on Near-Vertical Incidence Skywave (NVIS) antennas, which are crucial for short-range radio communications, particularly in military and emergency contexts. It explores NVIS theory, antenna models, and installation criteria while debunking common myths about reflectors. Key topics include usable frequency bands, optimal installation heights, and the impact of soil quality on performance. The presentation outlines the best bands for daytime and nighttime use, emphasizing the importance of understanding propagation characteristics to enhance communication effectiveness within 200 to 300 miles.

Interesting variant on the 3-element Yagi. Lightweight fiberglass (or similar) tubes supporting a wire structure of elements

This software predicts future passes for amateur radio satellites for a specified location and period of time. It runs on the Android operating system

A Compact size 80-10 m field day antenna offering a Low angle of radiation and very easy to build and set up

The article "Exploring the World of 10 Meter Beacons" by Ken Reitz, KS4ZR, provides an in-depth look at 10-meter beacon operations, focusing on their utility for propagation analysis. It details FCC Rules part 97.203 governing beacon stations, including license requirements, power limits (under 100 watts), and the specified band segment of 28.200-28.300 MHz for U.S. operations. The content highlights the diversity in beacon construction, from converted CB radios to home-brew QRP transmitters, and discusses the robust operating conditions these 24/7 stations endure. The resource presents several case studies of active 10-meter beacon operators like Ron Anderson KA0PSE/B, Domenic Bianco KC9GNK/B, and Bill Hays WJ5O/B, detailing their equipment, antenna setups, and typical signal report volumes. It also introduces the NCDXF/IARU International Beacon Project, which features 18 synchronized beacons worldwide transmitting on 28.200 MHz at varying power levels (100W, 10W, 1W, 100mW) to facilitate propagation testing. The article also covers the PropNet Project utilizing PSK31 on 28.131 MHz and the 250 Synchronized Propagation Beacon Project on 28.250 MHz. Practical advice for monitoring includes using the RST reporting method, understanding the impact of the solar cycle on 10-meter propagation, and tips for setting up a personal beacon, such as frequency selection and power output considerations. The IY4M Guglielmo Marconi Memorial Beacon Robot on 28.195 MHz is also mentioned for its automatic QSO mode. The article concludes with a list of other resources for 10-meter beacon information.

The document provides information on the Maria Maluca Antenna by dl8ncr, a small beam antenna fed with VHF ribbon line consisting of a dipole and a director adjusted for the desired band. It offers details on the construction and usage of this HF multi-band directional antenna.

7 dB for 7 Bucks, a 2 meter beam antenna for the cost of a fast food meal!

ARRL pdf file on how remove car noise from your radio. Modern vehicles are RF noisy environments. Come learn how to identify and silence yor mobile noise sources, by WA6PDP

Horizontal HF 6-Band turning arranging emitter with 2 elements Maria Maluca

Adalet wireless document on antenna basics in a four pages pdf file

An easy to build antenna for ground reception of NOAA weather or amateur satellite signals. Double cross antenna by Gerald Martes

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

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.

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).

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.

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.

Lot's of info on 950sdx tranceiver by Jeff King ZL4AI/DU7

Freeware windows program for programming the Uniden SC230, BC246T, BC330T, BCD396, BC15T and BCD996T scanners. FreeSCAN allows to download and uploading programming, remote control the scanner, log hits, and supports printing out of systems and groups.

Schematics and purchasing information for the Yaesu FT - 8x7 DIY Bluetooth CAT micro miniature interface done by YO3GGX

This is a Live DX Cluster map powered by google maps diplays a map of ham radio QSOs or contacts based on qra locator and dx-cluster spots information

A delta loop antenna for 17 meters band include eznec antenna model file

Virtual Radar Server is a free windows decoder of ADS-B signals received by several radio receivers and support even networked data feed. The Server publish a Google Maps-based display of aircraft positions and flight list

US Amateur Radio Band Plans by ARRL

Built around a 1/2" pvc frame, Larry's 6 meter moxon antenna is made from #8 aluminum ground wire

Free Donwload of the PDF file of ITU and CQ zones of the world, made available by Icom America

Build your own home made Antenna Analyzer with an arduino micro, or a cheeper one with a pic processor

Very strange morse keyers, like Onion chopper CW key, Handshake CW key, Chopsticks CW key, Typewriter CW keyboard, Refrigerator CW key by OH6DC

The ICOM IC-7300 is a cutting-edge HF transceiver that has garnered significant attention since its release. This review, published by ARRL in QST, provides an in-depth analysis of its features, performance, and usability. The IC-7300 is known for its direct sampling technology, which enhances its sensitivity and selectivity, making it a favorite among amateur radio operators. The review covers various aspects, including the user interface, audio quality, and overall operational capabilities, providing valuable insights for both new and experienced hams. In addition to its technical specifications, the review discusses the IC-7300's performance in real-world scenarios, such as DXing and contesting. It highlights the transceiver's ability to handle weak signals and its versatility across different modes. The review serves as a helpful guide for those considering the IC-7300 for their station, offering a balanced perspective on its strengths and potential drawbacks. Overall, this review is an essential resource for anyone interested in the ICOM IC-7300 and its place in the amateur radio landscape.

A 2-way remotely operated HF antenna switch, based on an idea supplied by G3YEU

A reference matrix of Kenwood Microphones by models with connector specifications and transceiver compatibilty.

Build yourself a postage stamp 40 meter wire dipole antenna that fits in a space a little over 20 wide and works reasonably well at low heights

Tombone VHF antenna for 146 MHz ad designed by YB8EIP

Lets you listen to your scanner across your own network, or via the internet. Shoutcast/ICEcast compatible broadcasting for Uniden and GRE scanners. Broadcast your audio from your PC. ScannerCast is a specialized broadcasting solution that enables users to stream scanner audio feeds over the internet. This software supports both Uniden and GRE scanner models with tag information capability, while providing audio-only functionality for other scanners. Compatible with standard streaming protocols, ScannerCast allows remote listening via common media players without requiring specialized client software. The program features customizable tag display, adjustable bit rates, and seamless integration with Radio Reference. Its efficient design replaces multiple legacy applications while improving tag/audio synchronization. ScannerCast operates efficiently across various Windows environments, making remote scanner monitoring accessible from any location with internet connectivity. Scannercast is no more supported or developed by it's author.

A quarter wave vertical end-fed antenna for the 40 meters band. As all vertical antennas, also this aerial requires a good earthing system. In this project the ground is composed by twelve 4, wires buried in the lawn by using a spade to create a slit to drop the wire into.

Download chip64, freeware windows digital mode by IZ8BLY Nino

A multi-band inverted-V dipole for portable operation by GM3VLB

By ON4CFC Pascal, describe how to build a Sperrtopf or Sleeve antenna for the 144 Mhz, PDF File by antennex

A 40 80 dipole antenna design by WA6ESC PDF File

Instructions to modify the ICOM IC-7600 to extend reception and trasmission

MT63 soundcard program for Windows by IZ8BLY

A marriage of the windom and slinky antennas, experimental home brew antenna by NC4TC

Free Morse Code CW training software for Android supporting the Koch method by IZ2UUF David

A homebrew fishing-rod vertical using a very nice design from EB5EKT. This antenna works 20, 30, and 40M bands by selecting the tap points using alligator clips

30/17/12 and 20/15/10-Meter Tribanders and a 40 meters inverted V wire yagi antenna