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The Maria Maluca HF multiband antenna as designed in 1957 by PY2BBP is a directive antenna for 15 meter and a passive element that works as director and reflector in different bands

Ham Radio Ireland, a diary and photos by EI2KC Anthony

ICOM blog article on how to remotely control your ICOM transceiver using the Icom RS-BA1 Internet Protocol (IP) Remote Control Software supporting most of recent ICOM HF transceiver products

RF amplifier products from NP Technologies, Inc. encompass a wide array of specialized designs, including highly linear Class A broadband amplifiers, crucial for maintaining signal integrity across various frequencies. Their portfolio also features cell band amplifiers, specifically engineered for cellular communication infrastructure, and pulse amplifiers, which are vital in applications requiring high-power, short-duration signal bursts. The company's manufacturing capabilities extend to AM and FM broadcast amplifiers, supporting radio transmission systems, and military VHF amplifiers, designed to meet rigorous defense specifications for robust and reliable communications. NP Technologies, Inc. emphasizes comprehensive development, design, manufacturing, and testing processes for all its RF amplifier offerings. This integrated approach ensures that each product, from initial concept to final deployment, adheres to stringent performance and reliability standards. The company's expertise in these areas allows for the creation of custom solutions tailored to specific client requirements, addressing complex RF challenges in diverse operational environments. Their product range demonstrates a commitment to serving multiple sectors, including commercial broadcasting, telecommunications, and defense. The focus on specialized amplifier types underscores their technical depth in RF engineering.

With Varying Frequency - Amateur Radio Ponderings

Amateur radio blog from UK

This blog is maintained as a resource for the IOMARS and other persons interested in Amateur Radio.

online log of DX0DX DXpedition 2011

SWL and amateur radio by IZ1CRR

An attempt to explain why I love this strange hobby

A simplified explanation of decoding West German numbers messages transmissions without a computer.

Ham radio blog in English and Dutch. The radio adventures of PE4BAS.

Ham Blog dedicated to dxing and IOTA

The W0IS resource outlines methods for finding historical US amateur radio call signs, particularly for genealogical research. It highlights the comprehensive collection of digitized call books from 1906-1996 available at leehite.org, stored as searchable PDF files. These resources significantly simplify what was previously a laborious manual search through physical call books, which were typically indexed by call sign rather than name. The guide details specific search techniques for various eras. For early radio days (1913-1923), government call books are readily available and searchable online via Google Books and hathitrust.org. For the period between the 1930s and 1980s, when private publishers like "Radio Amateur Call Book Magazine" dominated, the resource points to archive.org for scanned editions (1938, 1940, 1948, 1972) that support full-text OCR searches, despite potential scanning errors requiring flexible search terms. It also provides strategies for navigating Google Books' "snippet view" for the 1952 call book, including searching by name or address and interpreting often illegible snippets. The resource suggests cross-referencing findings with hamcall.net for call sign verification from 1921, 1954, 1960, 1969, and 1983 onwards. Additionally, it lists physical call book collections at institutions like the Pavek Museum of Broadcasting and individuals like W3HF, offering avenues for deeper research when digital methods fall short.

Qsl card collection at VU2NAN blog

This is Leigh WA5ZNU's Web Log

A blog mainly about my favourite hobby-amateur radio, shortwave listening and radio in its many forms.

Wondering whether human body could be used as an antenna.

Sponsor of the Spartan Sprints are two-hour gatherings held the first Monday of every month.

Windows shareware contest log program for the CQ 160 meters contest

An in-depth comparison here between the various digital technologies

The _Nemos Photography_ blog presents a curated visual gallery focusing on _Morse keys_, offering a detailed photographic exploration of various telegraphy instruments. Each entry typically features high-resolution images of specific keys, highlighting their design, construction, and historical context. The content serves as a visual reference for collectors and enthusiasts interested in the aesthetics and mechanics of CW sending devices, often including close-ups of key components and unique features. This resource allows for comparative study of different key types, from vintage straight keys to modern paddles, without delving into technical specifications or operational performance. The emphasis is purely on the visual documentation of these artifacts, providing a unique perspective on the evolution and diversity of Morse key designs. It is a specialized collection for those who appreciate the craftsmanship and historical significance of telegraphy hardware.

Notes on how to properly install a Mini Whip receiving antenna in an noisy urban environment.

History of all OSCAR satellites from 1961 till today in chronological order.

FDlog is a free windows Field day logging program in Danish

Ham Radio News and more by N5FXX - Lubbock, Texas

Ramblings on amateur radio, flying, programming, martial arts, the Macintosh and who knows what.

Digital modes and information Gran Canaria

Weak Signal Audio 160m, choosing a headphone for weak signals reception

A tutorial on how to setup a receiver capable to decode SSTV signals with a small RaspberryPi version 2 and a RTL-SDR dongle. The author explains how to install the needed software to interface the RTL-SDR and a step by step guide to install the QSSTV software used to decode the signals.

tabLog has been written to offer basic logging when /P and allows for easy import into your Shack-based log via ADIF. Best performance is with a tablet in landscape mode and using a small Bluetooth/micro-USB QWERTY keyboard – QSO entry via this method is simple, and efficient.

Mircules HAM QuickLog provides a mobile logging solution for amateur radio operators, supporting quick contact entry on iOS and Android platforms. It features multiple log file management, instant callsign information display including Country, ITU zone, CQ Zone, and DXCC number, and robust ADIF and CSV import/export capabilities. The application is designed for efficient logging with optional fields and default values, streamlining the process for both shack and field operations. The software includes dedicated support for POTA, SOTA, and IOTA activations through specific fields like MY_SIG_INFO, SIG_INFO, MY_SOTA_REF, IOTA, and MY_IOTA. A specialized contest mode offers real-time dupe checking and automatic TX exchange updates to enhance contest efficiency. Integration with QRZ.COM and HAMQTH.COM allows for direct operator information lookup and import, while Open Street Maps integration provides geographic context for contacts. The application also features a notes and scratchpad function for each log file.

Large personal QSL collection by I3CRW

How new technologies affect the art of contesting by DH1TW

A blog dedicated to QRSS

A blog about ham radio. A blog dedicated to cool stuff like ham radio, birdwatching and bus timetables

K6BJ-2m Repeater Maintenance and Repair Log

A satirical look at the world of ham radio DXing and contesting. Not for those without a sense of humor or irony

Article on how to use logic analyzers for testing complex logic-digital circuits

Official page of the IARU High Speed Telegraphy Championships

Blog related to ham radio t-shirt and accessory designs

TO2D Online log Saint Barthelemy DXpedition Log

Designs for QRSS TX and other Arduino based systems

What goes on at IK1ZYW laboratories, day by day

Ham radio blog from west malaysian station 9W2MSG

Testing a linear regulated power supply using headlight bulbs for loading.

My view on the world of AMATEUR RADIO- "Rambling on" so to speak

radio.McDougallsHome.net The Web site and Blog of Amateur Radio Station K7JM. Homebrew, Construction, Operating, and Discussion

This DIY vertical multi-band Windom antenna offers a practical and effective solution for amateur radio enthusiasts seeking a versatile and compact antenna for HF communications. Its simplicity of construction, multi-band capability, and favorable performance make it a valuable addition to any radio shack. The article provides detailed instructions on constructing the antenna and balun, along with diagrams and component specifications. Field tests demonstrated successful contacts with stations across Europe and North America on 14, 18, and 28 MHz. The antenna exhibited comparable performance to a W3DZZ dipole and outperformed a Cobweb antenna on 18 MHz. Low noise levels were observed, effectively suppressing background noise.