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The main function of the Ugly Balun is to help eliminate rf currents from flowing on the outside of coaxial cable using the principle of choke action.

This page is dedicated to amassing information on the Tentec/Globe Wireless RX-321/RX321

San Diego Police scanner

Two-meter and aircraft band receiver specifically designed for RDF on foot, sold by Bryan Ackerly VK3YNG

A compact 2 element W8JK beam antenna for 20M to 10M bands by AF6SA

Spectrum Analyzer pro is a commercial application that will turn your computer into a modern spectrum analyzer. This will provide you with features that go far beyond the possibilities of any stand-alone hardware unit. Run under recent Windows versions, available in trial mode. Spectrum Analyzer pro is a comprehensive application that will turn your computer into a modern spectrum analyzer. This will provide you with features that go far beyond the possibilities of any stand-alone hardware unit. The application can be configured in a number of different ways, to accurately model the ballistics, responses and graphics of a wide range of standard peak programme meters. The Spectrum Analyzer can scan a wave or mp3 file, then calculate the average of all bars (amplitude) for the elapsed play time. The Wave Player allows you the opportunity to load a pre-recorded Mp3/wav files and run an analysis of the data. All data contained in your sampling will be shown. Any changes made to the sampling rate will be automatically detected by the Spectrum Analyzer. The Locator is very practical when you work with big Wave files. Detecting and eliminating room modes sound reinforcement 24 Octave Spectrum Analyzer

The X80 multi-band HF vertical antenna, a commercial iteration of the Rybakov design, exhibits a physical length of 5.5 meters, or approximately 18 feet, and is constructed from aluminum tubing. It operates as a non-resonant vertical, requiring an external antenna tuner for impedance matching across its intended operating frequencies. The antenna's design incorporates a 1:4 UNUN at its base, facilitating a nominal 50-ohm feed point impedance for the coaxial cable. Performance observations indicate effective operation on 40 meters, 20 meters, 15 meters, and 10 meters, with reduced efficiency on 80 meters and 160 meters due to its relatively short electrical length for these lower bands. Comparative analysis with a G5RV dipole and a half-wave end-fed antenna reveals the X80 offers a lower take-off angle, beneficial for DX contacts, particularly on the higher HF bands. Field tests conducted with an Icom IC-706MKIIG transceiver and an LDG AT-100ProII autotuner demonstrate the X80's ability to achieve acceptable SWR across 80m through 10m. The antenna's compact footprint and ease of deployment make it suitable for restricted spaces or portable operations, though its performance on 80 meters is noted as a compromise compared to full-size resonant antennas.

Kc2uoo review of the yaesu ft-450 in this youtube video

Cabrillo2Adif A software for converting the radio logs from Cabrillo to Adif log format (for Mac OS X)

Software for analysis of guyed and self-supporting towers & poles

In this PDF article Zack Lau describe how to homebrew a four element yagi beam antenna for 50 MHz band, including how to build mounting blocks and tubing clamps to hold elements.

Examines the design and performance of a compact, efficient multiband beam antenna, based on a modified **W8JK array** by K5LJ. The author recounts his quest for a simple, compact, and reasonably efficient beam, initially using a single delta loop for 40 meters. He then details his modeling efforts with EZNEC, focusing on a W8JK array using 20-meter dipoles, noting its venerable design history in various Antenna Handbooks and QST. The resource explains how the classic W8JK array, composed of 0.5-lambda elements at the lowest operating frequency, uses a closely spaced phasing line to connect feedpoints, often 450-ohm ladder line. K5LJ's modifications, including offsetting the feedpoint on the phasing line, resulted in surprising gain and a somewhat unidirectional pattern on 20 meters, rivaling a full-sized Yagi. The article also delves into mechanical construction details, using nested tubing and PVC pipe for element isolation, and discusses the feedpoint impedance characteristics across multiple HF bands.

A Co-ax Trap Dipole For 40, 30 and 20 Meters or at last that was the intention

This is an internet resource for those interested in guitar amplifiers, vacuum tubes, and design tools such as SPICE modelling.

Heathkit Icom Kenwood Power Transistors Ten Tec Yaesu spare Hamradio parts.

A magnetic loops for HF pedestrian mobile project by VK3YE

Pre-inked - re-inkable stamps

A very portable Umbrella Dish for the A0-40 Satellite operation, by G6LVB

A simple antenna analyser for the HF spectrum with a built-in signal generator with 3-digit LED frequency display.

Construction of attenuator, suitable for fox hunts at 144mhz

Pics and specifications

Free windows morse code learning program. Whether you want to learn Morse code from scratch, never having heard a dit in your life, or you just want to speed up your copy for CW contesting, CW Teacher will help

Sleeve baluns are normally used at VHF and higher. As a general rule, they are not practical at HF. The balun can be inverted and used as a skirt to form part of the antenna element

5000+ member discussion group for the low-cost series of SoftRock SDR receiver and transceiver kits.

Kenwood TS-450S/TS-690S MARS modification video

A dipole antenna for 7 MHz support for this antenna is fiberglass military mast

How to become a High Speed CW operator, summary of information by AH6NB

Home Page of Ivan, 9H1PI, QRV from the island of Malta on 50 MHz.

Flash crystals, Feakin' beacon keyer, beacon attenuator

Constructing a compact, single-feed triband Moxon antenna for 20, 15, and 10 meters is detailed by DU1RZ, drawing from his personal experience with space-constrained antenna projects. Initially fascinated by cubical quads, the author transitioned to Moxon designs in 2005 after realizing his roof space was insufficient for a bulky quad. His first experimental monoband Moxon for 15 meters, built from repurposed materials, provided solid DX QSOs for seven years, despite being slightly below the 21 MHz band center. The project outlines the design process, including using the _MOXGEN Calculator_ for element dimensions and material selection, such as #14 AWG enamel copper wire and fishing poles for spreaders. DU1RZ shares insights from simulations with DL2GMS regarding insulated versus non-insulated wire performance, noting that insulated wire can shift resonant frequencies lower. The assembly instructions cover preparing wire elements, connecting feed points, and tuning the antenna, with initial SWR measurements taken at 10 feet and final readings on a mast showing excellent results: 1.0:1 on 14.225 MHz, 1.1:1 on 21.250 MHz, and 1.3:1 on 28.50 MHz. Transmission tests with 4F1BYN indicated a front-to-back ratio of approximately 2 S units with 10 watts output. The author emphasizes adaptability, encouraging builders to use readily available materials rather than strictly replicating his setup. Key observations from DU1RZ and DL2GMS highlight the antenna's strong performance across 20, 15, and 10 meters, good front-to-back ratio, full bandwidth on 20 and 15 meters, and its small turning radius of about 4.18 meters (13.54 feet), making it suitable for limited antenna space. Its lightweight construction and low wind load are also noted as significant advantages.

Specifiation at rigreference.com about Yaesu VX-8R/E

SSTV, pictures, home brew from sweden

Extend the range of wireless network or connect to other wireless networks in neighborhood with your own wifi antenna.

A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN

Amatuer Radio QSL Cards. Full Color QSL and Eyeball Cards

A project for a 50 MHz moxon rectangle antenna

Why all the mystery surrounding baluns ? To use or not to use baluns

A bycicle ham radio station setup, with full band coverage

Columbus Police Dispatch - Citywide Live Audio Feed

An Offset Attenuator for fox hunts.

Chart showing how SWR effects how much power you actually radiate from your antenna.

Use this online calculator to determine the length of a quarter-wave antenna from the frequency. Both metric and English units of measurement are supported.

Resources for amateur radio astronomers, teachers, and students.

Community blog at livrjournal

The Antique Radio Repair Center at For Your Listening Pleasure has been providing quality antique radioold zenith, zenith.gif repair and restorations for well over 20 years.

Hams with web cams database with net and roundtable information.

In his back office section, ON4SKY, initiates in a few articles the beginners in the art of QSLing and award chasing.

Your beginner's guide to shortwave radio, include an up to date blog and news about products and events.

A hombrew QRP transceiver for 40 meter band with many pictures, circuit and sound recording of some QSOs made with this Rig consisting of 5 transistor and one chip.