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Allows you to automaticaly upload ARGO screen captures to your webpage in a convenient way. by ON7YD -
This Duoband-Yagi has a boom of 3.60 m and 3 elements for 10 m 4 elements for 6 m and one feedpoint with 50 Ohm -
Homepage of Hong Kong's elite group of DX'ers -
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Construction and analysis of a low cost omnidirectional horizontally polarized antenna for 144 MHz, including notes on halo antenna stacking -
The Smith Chart program with its extensive Help files. Written in Visual C++ ver 1.5, it runs in Windows 3.1 and later by w9dmk -
Dedicated to 50MHz and 144MHz. Online 2m and 6m logs. Real Audio sound clips of Tropo, Aurora, Sporadic E, Meteor Scatter, TEP and F2 Propagation. -
Links and sources of information about our club in Ventura County, California -
VHF, ms, aurora, es, photos, audio, link, soft and more. -
A lightweight portable vertical antenna for 40m -
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An online javascript calculator for cubical quad antennas, simply input the resonating frequency to calculcate up to a five element quad antenna. This quad antenna calculator let you determine the total length of each element and spacing among elements. -
conversion of low band VHF AWA RT-85 transceiver down to 6 metres. -
This free program calculates the location of any locator. It calaculates the distance, azimuth, longitude and latitude between two Maidenhead locators. Converts longitude/latitude coordinates to Maidenhead locator Converts Maidenhead locator to longitude/latitude coordinates -
Here is a well documented plan of a 20m-10m compact magnetic loop antenna. Article includes lots of pictures and technical details published by KP4MD -
A homemade 10 element Yagi Beam Antenna for 50 Mhz by Rod Mackintosh, a NBS Yagi on a 13.2 metre boom. -
80-meter peilontvanger / receiver includes printed circuit sample and list of components -
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JL is a free contest logger written entirely in Java. Run under Windows, Linux, Solaris, and MacOS X by W1JQ -
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If you need a cheap and easy to construct Subtone Generator for EU-model VHF-UHF rig, here is a solution that works very well. -
Modifying consumer off the shelf wireless LAN devices for specialized amateur use -
KyteLabs InfoBase - Electron Tubes & Valves Data -
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DL7JV Christian report his direct experience on magnetic antennas -
Contest team 9A7A, basic info and photos about our activities -
Adventure Radio, articles and reviews. This site has a whole host of ham related information. -
Located about 25 miles south of Boston, MA, near the City of Brockton. -
Information and news about Amateur Radio in Scotland -
10 meter propigation beacon project -
VE3BDB's personal page serves as a dedicated resource for members of the Radio Amateurs of Canada (RAC) residing in the Ontario South Region. Bob Cooke, VE3BDB, previously held the position of Director for this region, offering localized support and information pertinent to the RAC's activities and initiatives within Ontario South. The page likely covered regional news, events, and specific guidance for local hams, reflecting his role in facilitating communication and engagement among the amateur radio community in that area. While the page is no longer active and Bob Cooke has transitioned from his regional director role to RAC Vice President for Field Services, its original purpose was to centralize information for Ontario South hams. The content would have been tailored to address regional concerns, promote local ham radio activities, and provide updates relevant to RAC members in that specific geographic area, directing users to the main RAC website for current information. -
Dragoslav Dobricic, YU1AW antennex article on influence of Boom on frequency performance and how compensate it -
This is the homepage of Kayalpattinam Ham Radio Society (VU2 KYP) - Ham Radio Society from Kayalpattinam, Tamilnadu, India -
A 50-ohm generator feeding a 50-ohm line connected to a _quarter-wave transformer_ (150 ohms) terminated in a 450-ohm load is analyzed to understand transient behavior. The paper meticulously tracks voltage and current waves, reflection coefficients, and power levels through a sequence of events, starting from quiescent conditions. It details how incident and reflected waves combine and interact at impedance discontinuities, illustrating the dynamic changes in impedance and SWR at various points in the system. The analysis reveals that the impedance at the interface between the 50-ohm line and the 150-ohm transformer changes from 150 ohms to **64.3 ohms** after the first reflected wave arrives. Subsequent reflections cause the impedance to asymptotically approach 50 ohms, reaching **53.22 ohms** after five wave terms. The study also examines the generator's reaction to transient SWR changes, noting that a 3:1 SWR can temporarily reduce generator output to 0.75 watts, but these effects are temporary and diminish as the system approaches steady-state conditions. -
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The Double Bazooka Dipole is a very efficient single band antenna which is very quite,and does not require the use of a balun. This antenna consists of coax (RG58) with the shield split at the center and the feedline attached to the open ends. -
High pass filter schematics for TVI and examples of finished filters -
We intend for this page to tell our story as well as be a resource for other "hams" -
conversion of low band VHF AWA 25M-22 carphone onto 6 metres. -
A home made project, scan and monitor the 2.4 GHz band using a common MMDS downconverter. -
Over 130 years after its inception, Morse Code remains a fundamental skill for many amateur radio operators, enabling efficient QRP operations, DXing, and contesting. This resource provides an in-depth look at the **Koch Method** of Morse training, a widely adopted technique that emphasizes high-speed character recognition from the outset. It details how this method can significantly accelerate proficiency, moving beyond traditional, slower learning approaches. The site also delves into the rich history of amateur radio, presenting articles such as "Radio on the Rio," which chronicles local ham activity in Socorro, New Mexico. Another piece, "The Russian Woodpecker," recounts the Cold War-era efforts of hams to counter Soviet over-the-horizon radar interference on the HF bands. Furthermore, the resource explores the fascinating intersection of ham radio and radio astronomy, highlighting the direct lineage between amateur experimentation and the development of modern radio telescopes like the **Very Large Array (VLA)**. It also includes an introduction to the 6-meter band, often called "The Magic Band," detailing its unique propagation characteristics and suitability for no-code licensees seeking long-distance contacts. -
Mounting on Roof or at Ground Level? Why ground plane antenna works better at lower level. -
Article by VU2GT about VHF antennas, how to evaluate performances and models. -
based on an FT-1000MP Reflector discussion with Bill Heinzinger, W9OL, 15/16 November 2002 -
SARA provides emergency communications for the City of Saratoga as well as for community events. -
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Firsts pictures of Icom IC-9100 taken at Tokyo HamFair 2009 -
An home made cw transceiver by PA2OHH