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Guest house with acomodation for 3 more people in Uruguay

Packet radio applications by Luis Fdo. y Jose Carlos Ramirez, EB7CJO in Spanish

ECONCO has been rebuilding vacuum tubes for more than 30 years. Our commitment to quality, and concern for the environment has won us the acclaim of clients worldwide.

A morse keyer project made on Arduino, inlcudes the main program script by m0xpd

Kenwood TS-480HX Resources at eham.net

Radio Frequency Interference To/From touch lamps and dimmers

PE1OPM review the yaesu FT-897

An inexpensive rechargeable CMOS battery system that can be built from readily available parts.

Review of Cushcraft MA-5B multiband Antenna after some days of usage.

If you want to build a cw decoder without using other active components than an atmel 328 - Arduino UNO , then this is sure something for you.

Win EA6DDlog is a freeware logging application for Windows, developed by EA6DD Biel. It integrates features from existing software like Swislog, Urelib, Logger, and HamRadio Deluxe, presenting a Multi-Document Interface (MDI) similar to Logger. The program prioritizes simplicity, practicality, and operational speed, allowing functionality even on less powerful PCs. It does not require a formal installation; users can run it directly from a portable drive or any directory. This logging utility supports CAT control through Omnirig by Alex Shovkoplyas, VE3NEA, which is automatically installed if not already present on the system. It also offers QSL printing capabilities and connections to online callbook services such as QRZ and HamQTH for contact information. EA6DDlog includes an automatic update mechanism that checks for new versions upon startup, requiring internet access. For Windows Vista users, disabling User Account Control (UAC) is recommended for proper update functionality. The software is part of a broader development effort aiming for cross-platform compatibility, with future versions planned for Windows Mobile, Linux, and macOS.

The following table is adapted from the International Telecommunications Union Radio Regulations Appendix 18, including changes adopted by the 2012 World Radio Conference.

SDR-Radio.com is a Windows console for Software Defined Radio (SDR) receivers and transceivers. Designed for the commercial, government, amateur radio and short-wave listener communities, the software provides a powerful interface for all SDR users

Design of a 40 meter Vertical antenna

W5DDL, Acadiana Amateur Radio Association, located in beautiful Lafayette, Louisiana.

The Hualapai Amateur Radio Club is located in Kingman, Mohave County, Arizona, USA (DM25xf).

Ham Radio ITU International Callsign Country Prefixes

Schematic diagram and description of a magnetic loop antenna that works from 10 to 20 meters band, made from junk

Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.

An antique radio collection

How to operate Instant Tune and Instant Track or DOS Programs on a last generation computer in french and english by ON6WG F5VIF

Island DXpedition and portable operations, including present, up-and-coming operations, IOTA, NON-IOTA, IOSA, IIA, ILIA, DIB, Lighthouse, and other Island Award Program operations

Get familiar with the basic operating procedures for using the JT65 mode of HF digital communications, a 35 pages PDF file.

German pirate radio station

Personal SWL log with various information from SWL tips and tricks to Frequecy Logs to general SWL information.

Linear Amp UK specializes in the design and production of high-quality linear amplifiers, offering models for HF, VHF, and UHF amateur and commercial applications. The company emphasizes nearly 30 years of experience in crafting each unit, ensuring robust performance and longevity. Their product line includes amplifiers engineered for a 100% duty cycle, promoting continuous and reliable operation across various modes. The amplifiers feature solid, dependable designs, ensuring quiet and effortless performance during transmission. Each unit is hand-built to stringent standards, reflecting a commitment to durability and operational stability. All products are CE approved, confirming compliance with European safety and environmental directives, and come with a standard two-year warranty, providing assurance to operators. Key specifications often include coverage for 1.8-30MHz (WARC bands), 50MHz, 70MHz, and 144MHz, utilizing tubes such as 811, 572, 811A, 572B, GS35, GS35B, 8877, 3CX1500, and _3CX1500A7_ in their designs.

Mac the Scope is a professional quality signal analyzer, 1/3 octave RTA, signal generator, and more.

Improving measurement accuracy when low-power analyzers are used.

Schematic of a homebrew receiver and keying

Donwload the Kenwood TL-922A user Manual

Review of the Kenwood TS 830

With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.

This resource provides a detailed historical record of satellite downlink frequencies, systematically organized by both frequency range and the satellite's launch year. It presents extensive listings covering segments from 8 MHz to 9000 MHz, including specific breakdowns like 136-137 MHz and 1600-2200 MHz. The data is segmented into distinct frequency blocks, offering granular information for various bands. The content delineates frequencies for satellites launched across several decades, with specific sections for years such as 2004, 1999, and extending back to 1967. This chronological organization allows for tracking the evolution of satellite communication frequencies over time. The resource serves as a reference for identifying operational downlink frequencies of historical space assets, which is particularly useful for satellite enthusiasts and those interested in _space tracking_ or _vintage satellite_ communications. The utility of this compilation lies in its specific historical data, providing a unique perspective on past satellite operations and frequency allocations.

G4ILO compares popular antennas for 2 metre band handhelds so as to see how much you lose using a small inconspicuous antenna or how much you gain by using a long antenna.

A general article on CMC, common mode choke include a description and tipical usage.

A parabolic dish ring feed optimum resonance frequency of 1325MHz

Article on ham radio mobile operation from Andy D. Crouch N5NDD

Amateur (Ham) Radio Practice Exams and Study Aids, as well as other content of interest to the Ham Radio community. Presented by Michael Burkhardt W8MHB.

The Boston Amateur Radio Club (W1BOS), and ham radio in Eastern Massachusetts

Cushcraft A3S HF antenna 1:1 balun repair.

This page list schedules for the E10 Spy Number shortwave radio station, commonly believed to be run by mossad.

A multi band portable link dipole antenna for 20 30 and 40 meters band

Archive of yaesu ft-1000MP digests since january 2001

3W6C on-line log DXpedition 2010

Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method.

"Sezione A.R.I. di Torino presents ""Sala Radio"" dedicated to Duilio Secoli I1TMD"

KE7FTE, N7QQU and W9ERT show us the "drag and drop" flexibility of the Icom D-STAR System.

The broad band hexagonal beam (hexbeam) designed by G3TXQ and built by K4KIO

Kenwood TH-D7a TX band modification

Notes about generating RF sweep signals on the Arduino for filter testing, a digital version of the old Wobbulator concept