Search results

A project for a 50 MHz moxon rectangle antenna

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

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

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

Pics and specifications

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

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

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

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

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

SSTV, pictures, home brew from sweden

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

Construction of attenuator, suitable for fox hunts at 144mhz

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

Resources for amateur radio astronomers, teachers, and students.

Flash crystals, Feakin' beacon keyer, beacon attenuator

A Compact and efficient multiband beam antenna based on a Modified W8JK Array by K5LJ

This page contains a map of Amateur Radio Russian Prefixes.

Over 26 years of public service in Brandon FL

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

The Packet Radio beginners guide to packet radio operating by Buck Rogers K4ABT

A bycicle ham radio station setup, with full band coverage

Amatuer Radio QSL Cards. Full Color QSL and Eyeball Cards

Heathkit Manuals

Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.

ZS6YI modifications for the Icom IC7000

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.

The Western Washington DX Club is an organization of Amateur Radio (HAM) operators who have a special interest in DX or distance communications

How to make an effective RF Choke. The coiled coax choke is the easiest to make but also the least effective. This article includes some general guidelines for winding coax chokes on a 10cm PVC pipe using RG-58 or RG-213 coax cable.

An Offset Attenuator for fox hunts.

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.

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

Manufacturing distributor of infrastructure products for the telecommunications industry; antenna mounts, ice bridge, cable ladder, ground bars, weatherproofing, exothermic, safety equipment.

Firsts pictures of Icom IC-9100 taken at Tokyo HamFair 2009

Sams continues the tradition with the publication of new manuals every month, covering the latest in Televisions, including HDTV, Projections TVs, and coming soon, LCD monitors.

Community blog at livrjournal

Learn morse code with morse machine, A Fully Automatic Morse Code Teaching Machine first described in a May 1977 QST. Free for Windows MacOS Linux and DOS

Tektronix Oscilloscpe home page, feature tekexpress DSA series products

Hams with web cams database with net and roundtable information.

This site serves a community of volunteer and paid professionals in Search & Rescue and Civil Air Patrol who save lives and Amateur Radio enthusiasts who use DF skills as a hobby. We provide antennas and other resources for people in these fields.

How to receive images from orbiting noaa weather satellites using simple receiving equipment and a computer by G4ILO

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.

Columbus Police Dispatch - Citywide Live Audio Feed

A comprehensive listing of AM Stereo radio stations in North America with listening tips, news, AM mono to stereo radio conversion information, sources of AM Stereo receivers and a history of AM Stereo broadcasting.

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.

A tutorial video on manual programming the Wouxun KG-UV8D handheld transceiver

A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration

General article on Baluns at myantennas.com, what is a balun and when to use baluns