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CB Radio, and 10 meters antennas manufacturer

A morse code tutor for the Macintosh.

How to calculate "phasing line" lengths that actually work.

A QRP 900 grams hydraulic tuned small magnetic loop antenna by PY1AHD Alex.

An invisible magnetic loop antenna mounted under a table by PY1AHD

Excel spreadsheet that help calculating dimensions of a high efficiency magnetic loop antenna for HF bands. Giving in input the loop perimeter, loop diameter and loop conductor will calculate electric characteristics, bandwidth, and efficiency

Spread Spectrum Scene. Radio Propagation notes, with downloadable files.

Angle Linear has been producing GaAs FET preamplifiers since 1980

W1YW QRZ page dedicated to fractal antennas

This project was published in the April 2004 issue of the Australian magazine Amateur Radio, and has been designed using parts which are very readily available.

This program displays solar-terrestrial data for radio waves propagation that is provided by the N0NBH web-service.

All bands HF mobile antennas manufacturer

Collection of mods for the Kenwood TS-850

CB and ham radio dealer in spain

Developed by Japanese 6 Meter Hams in the 1970's can be designed and built for almost any band

Low Cost Frequency Counter, Digital Display and DDS-VFO kits

Schematic for Data, power, CAT, Key and Mic connection interface cable

About dummy loads, what are they and how to build one

Produce QSL & post cards, stickers, ID cards, calendars, certificates, awards, membership applications, log and call-books, rubber stamps,T-shirts, brochures, advertising materials.

LNA Technology High Performance Low Noise Preamplifiers for Amateur Radio, VHF-UHF weak signal, DX, EME, and commercial applications.

If you are interested in the environment, the weather and other natural phenomena then there is something magical about being able to see pictures of the earth from space just as it is right this minute. One way you can do this is by receiving images from weather satellites.

Dutch scanner web contains information about dtmf pagers gsm tetra umts scanners decoders.

German Web site

Recordings of shortwave numbers stations

This resource details the conversion of an 80m elevated vertical antenna to include 160m operation, focusing on a relay-switched design over a trap-based approach. It presents specific feedpoint impedance values, such as **32 ohms** for 80m and **14 ohms** for 160m, and discusses the challenges of SWR drift encountered with the prior trap system during RTTY contesting. The article thoroughly explains the design choices for elevated radials, referencing _N6LF QEX data_ to debunk common myths regarding radial length and height, demonstrating that non-resonant radials can offer superior current uniformity. The construction section provides practical insights into building the vertical, including guying strategies, material selection from scrap pipe, and weatherproofing the relay assembly. It highlights the use of a common mode choke for the relay switching line, measuring approximately 5K ohms on both 160m and 80m, and details the L/C matching network's role in achieving a 50-ohm match at the end of a 300-foot RG-11 run. The author describes a precise VNA-based radial trimming procedure, achieving resonant values within a 3 KHz range. The content emphasizes the practical application of theoretical antenna principles, particularly concerning the interaction between the vertical element, cap hats, and the matching network. It offers a candid assessment of component selection, such as using junkbox parts and acknowledging the need for future upgrades to static drain resistors. The article serves as a comprehensive case study for advanced antenna builders tackling multi-band vertical designs.

ARRL comparison of HF transceivers, including Elekraft, TenTec,Icom, Yaesu and Kenwood recent transceivers based on QST product reviews

Gamma match antenna is an antenna 1/2 additional lambda with the impedance matching more flexible arrangements (var capacitor) by sliding through the gamma match/road.

Freeware windows program by VE3NEA that allow to view and edit the Master Callsign Database file used in many contesting programs, import and export callsigns, auto-download announced DX operations.

German page about packet radio, english version available

Military antenna masts

Power supplies, electrical testers, battery analyzers, cable tester, rf generators, spectrum analyzers, Digital/Analog Oscilloscopes, Multimeters , attenuators, frequency counter

This free software is an application solely for the use of controlling the Kenwood TS-480. Can be used to edit, save, and export to the TS-480 information such as Memory, Menu, and Auto Mode frequencies.

Excellent poster representing the electromagnetic spectrum from 31.2 mHz to 6.52 EHz, PDF file poster designed by Anthony Tekatch

Article on PC to radio interfacing by Paul Umbdenstock, WA1VOA

706 MKIIG picture and specifications by rigpix db

Ham radio dealer in Valencia Spain

Antenna accessories and related products

Essential tower tool invented through necessity.

You can use almost any Icom handheld to contact your 2720H back in your vehicle for crossband repeating.

Homebrew satellite antenna by G6LVB

Presents the mechanical and electrical specifications for a 5-element Yagi beam antenna designed for the 6-meter band. The resource details element lengths, spacing, and boom dimensions, specifically utilizing _EMT conduit_ for construction. It includes a diagram illustrating the element layout, a coaxial balun connection, and a reported SWR curve, providing a practical blueprint for hams to replicate the design. The design achieves a reported SWR of **1.1:1** at 50.125 MHz, indicating efficient impedance matching across the primary 6-meter DX window. The boom length is specified at 2.44 meters (8 feet), with element lengths ranging from 2.87 meters for the reflector to 2.59 meters for the director 3. This configuration suggests a gain figure typical for a 5-element Yagi, likely in the range of **9-10 dBi**, making it suitable for local and sporadic-E DX contacts.

This application note is designed to help the reader understand how balun transformers can be used in today's RF/Microwave communication applications.

DG6RBP homebrew project for a USB cable progtamming interface for the Yaesu VX-2 radio

A Low -Power, Distributed Capacitance Twisted Loop , indoor portable HF antenna by Monty Northrup, N5ESE

An 85ft wire fed against a 17ft counterpoise that works well in 80 and 40 meters

Here you will find broadcast, pirate, and clandestine information including loggings, QSLs tips, and last-minute news.

IC‐2300 MARS/CAP mod expanded frequency range 136‐174 MHz

The IndyScan website functions as a personal blog, documenting the author's experiences across various aspects of daily life, including travel, culinary adventures, and media consumption. Content frequently details personal trips, dining experiences in Indiana and other locations, and reviews of books, television shows, and products. The site also includes reflections on local events and personal purchases, providing a snapshot of the author's interests and activities. While the site's primary focus is personal narrative, it occasionally touches upon amateur radio, such as mentions of operating during a trip to Brookville, Indiana, or capturing a weather fax via shortwave radio. These ham radio-related entries are integrated within broader lifestyle updates, offering a glimpse into the author's engagement with the hobby rather than providing technical guides or detailed operational information. The resource serves as a personal journal, not a dedicated technical reference for amateur radio.

A 50 foot tower setup with pictures and installation details

Radio Management Software for the Radio Shack® PRO-92, PRO-93, PRO-2067, PRO-2053, PRO-95 and PRO-96 multi-system trunking scanners.