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FT-847 PA Mod, there is a better way, by G0MGX

A spectrum analyzer based on ATMega8 microcontroller and a CYWM6935 within a Nokia mobile phone case.

This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.

Setting up RTL-SDR, Zadig and SDR# on Windows

Yaesu FT-817 noise blanker improvement

How to calculate range for a VHF antenna with a simple formula and how to increase VHF coverage.

A modification to improve quality of built-in FT-817 Noise Blanker

Using old FM microwave equipment to operate the amateur radio 24 GHz band by EA4EOZ

Demonstrates the _RoMac Automatic CW Identifier 2012_ software, a Windows application designed to automate station identification and provide a tuning pulser. It can send CW identification via a sound card's audio output or by keying a radio's manual CW jack using a serial port's DTR line. The software also supports CAT commands for various Kenwood, Yaesu, Flex, and Elecraft radios, enabling automatic mode and frequency changes for ID transmission. It integrates with USB audio-capable radios like the Icom 7300 and Yaesu FT-991, simplifying connectivity with a single USB cable. The application features a fully programmable interface, adjustable CW speed from **5 to 35 WPM**, and ID intervals from **5 to 30 minutes**. The integrated "Pulse Tuner" function allows for safe amplifier and antenna tuner adjustments by sending short audio tones or rapid CW keying, with an adjustable duty cycle from 1% to 100%. It offers compatibility with a wide range of transceivers and amplifiers, and a schematic for a basic sound card interface is included for users without existing setups.

Simple Elecraft KX3 and PowerSDR configuration by AG1LE

G0KYA MMANA-GAL presentation and samples

This walkie is sold without the wide band receiver enabled, this is, only 144 and 432 MHz band

Construction of OZ2M 70 MHz transverter

A well documented Heathkit SB-200 restoration project by NT1K

Improving the reception on 70 MHz for the yaesu FT-847

A simple and effective antenna launcher system by AA4LR

Extending TX for the Kenwood TS-590s HF Transceiver

3D2C ONLINE LOG for conway reef 2012

Article on Phase-cancellation of noise on 2m band

Fundamentals of operating on single sideband

First released around 1995 and significantly redesigned as QWTelnet 2, this software provides a dedicated interface for monitoring DX-Cluster traffic via Telnet. It integrates a **SOTAwatch parser** with configurable audio alerts, allowing operators to receive notifications for specific search patterns in DX-Cluster remarks without constant screen attention. The application also supports parsing for **GMAwatch (German Mountain Award)**, providing alerts for German Mountain Award activations. QWTelnet 2.4.0, released on 07-APR-2012, runs on Windows (tested on W7) and is distributed as a ZIP file containing the `qwtelnet.exe` executable. It does not require a formal installation process; users simply extract and run the program. The software can display DX information for single bands, integrate with the Reverse Beacon Network, and link to external web resources for DXCC and SOTA information. It also supports local reference files for IOTA, WFF, and RDA awards, which users must source and place in the `qwtelnet/files` directory. For IOTA data, users can convert `IOTA.CSV` from UCX-Log or `DX4WIN_IOTA.TXT` into `iota.csv`. WFF and RDA reference files are directly sourced from their respective websites.

N4KGL review of the Elecraft KX3 transceiver based on first experiences in portable operations.

A great amateur radio shack desk done with a second hand solid core door, measuring 32 inches wide by 80 inches long.

On March 27, 2017, the FCC adopted final rules for the USA 630-meter band, detailed in Report and Order FCC 17-33, which required PLC coordination with the Utilities Telecom Council before amateur operations could commence. This resource documents the WD2XSH experimental group's activities, including authorized stations, band plans, and frequency assignments within the 465-515 KHz range, with many stations operating between 495-499 KHz and 501-510 KHz. The site also highlights the WRC-12 decision on February 14, 2012, which granted a new **7-kilohertz-wide** secondary allocation between _472-479 kHz_ for the Amateur Radio Service worldwide. The group's efforts included operating with a maximum ERP of **20 Watts** across 45 stations in the continental USA, Alaska, and Hawaii, using emission modes such as CW, PSK-31, FSK-31, and MSK-31. The site provides links to download FCC 17-33 in PDF and DOCx formats, and offers a station location map, a list of stations by callsign and frequency, and an archive of news updates. Reception reports for any 600-meter station are encouraged to help the amateur radio community understand propagation and repeatability on this challenging band.

2012 Ham Radio HK0NA DX Pedition to Malpelo Island, official site with hk0na online log

Make your own battery clip by nj2x

Technical considerations about the Yaesu VX-1

UN Amateur Radio News, curated by Artur UN6QC, presents information relevant to Kazakh radio amateurs, including details on their account activity and participation in **WFF Kazakhstan** expeditions. The resource also documents various diplomas issued within Kazakhstan, such as those related to WFF Kazakhstan and special programs like the "50th Anniversary of the first manned space flight by Yuri Gagarin" and "The Columbus of the Cosmos" Award. It aggregates international ham radio news and maintains a calendar of international HAM competitions. The site, operational since May 14, 2010, serves as a central point for information on HAM competitions organized in Kazakhstan. It also references external resources like WWW.CQHAM.KZ for award details and WWW.EQSL.KZ for UN EQSL services. The platform aims to be a useful hub for both local and international amateur radio enthusiasts interested in Kazakh-specific operations and awards. Key events like the **UN DX Contest** and the First UN Field Day, held May 19-20, 2012, are highlighted.

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

Wondering whether human body could be used as an antenna.

Solar panels test for portable battery charger by YO4HHP

The P4 Aruba Callbook, last updated in 2010, serves as a directory for amateur radio operators active from the Caribbean island of Aruba. It meticulously categorizes P4 callsigns into several types: **P41-** for special resident calls valid for one month, **P43-** for permanent resident calls renewable annually, **P49-** for permanent visitor calls also renewable annually, and **P40-** for temporary visitor calls valid for one month, often used in contests. The resource notes that obtaining a permanent visitor callsign requires passing a local examination. The callbook lists numerous specific callsigns, including their QSL routes, operator names, and sometimes addresses or activation dates. For instance, P41A routes via P43A, and P40HQ was used by P43ARC via I2MQP for IARU contests. The entries include both active and Silent Key (SK) operators, with dates of passing where known, such as P43ADA (SK, Sep 2014) and P43JB (SK Jan 2012). This detailed listing assists DXers and contesters in verifying contacts and ensuring proper QSLing for Aruba operations.

Review of the Heil PR-781 with a Yaesu FT-950 includes youtube movies and a nice product review

Operating Free DV, the open source digital voice codec for HF, allows any SSB radio to be used for low bit rate digital voice.

Why build antennas out of copper and not aluminum or stainless steel. Selecting the best metals for antennas evaluating the conductivity factor.

An interesting article on basics about Baluns, intoducing the skin effects on radio frequency currents and its effects on receiving and trasmitting article by VE7FO

A 10 Meter Beacon on 28.222 MHz

Constructing an End-Fed Half-Wave (EFHW) antenna offers a practical solution for HF operators seeking a multiband wire antenna without the need for extensive radial systems. This design typically employs a high-impedance transformer at the feed point, matching the antenna's inherent high impedance to a 50-ohm coaxial feedline. The article specifically details a 2012 approach, focusing on a transformer with a 49:1 turns ratio, which is a common configuration for EFHW antennas. The resource outlines the construction of a wire element cut for a half-wavelength on the lowest desired band, with specific coil arrangements enabling operation on harmonically related bands such as 40m, 20m, and 10m. It discusses the physical dimensions and winding details for the matching transformer, often utilizing a ferrite toroid core to achieve the necessary impedance transformation. The content provides insights into the operational principles and practical considerations for deploying such an antenna, including methods for tuning and optimizing performance across multiple amateur radio bands. While acknowledging that the presented information from 2012 may be superseded by newer insights, it serves as a foundational reference for understanding EFHW antenna theory and construction.

8Q7HU Maldives Islands AS-013 - 2012

9M0L 9M0 Spratly Is Layang-Layang DX Pedition 10-24 April 2012

The Baofeng UV-5R handheld transceiver, introduced around 2012, operates across the 2-meter (144-148 MHz) and 70-centimeter (420-450 MHz) amateur bands, offering dual-band receive and transmit capabilities. This review provides an early assessment of the radio's form factor, user interface, and general performance, noting its compact size and the inclusion of a **VFO/Memory mode** button for frequency management. The device supports both FM and narrow FM modes, with a reported power output of 4 watts on VHF and 3 watts on UHF, making it suitable for local simplex and repeater operations. Key features discussed include its 128-channel memory capacity, a built-in VOX function, and a **DTMF keypad** for tone dialing and repeater access. The review highlights the radio's ability to scan frequencies and memories, along with a dual-watch function allowing simultaneous monitoring of two frequencies. Battery life is addressed, with the standard 1800 mAh Li-ion pack providing several hours of operation depending on transmit usage. Initial impressions cover the radio's construction and the clarity of its LCD display, which shows both A and B band frequencies.

Homemade a custom programming cable that can works with Kenwood TM-V71A or TM-D710A

Dutch Young Ladies Club is part of the VERON and was founded in 1981. The ladies formed a contestgroup, starting in 2012, their slogan is -Proud 2B PI4YLC-

September 24th 2012 till October 5th 2012 3D2C DX Pedition

CH21A Nauru, IOTA OC-031 11 Jan 2012 to 07 Feb 2012 operated by HA5AO & HA5UK

Swains Island NH8S dx pedition 2012 official web site

Bahamas islands round trip 2012 26th April, May 6th

The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.

A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)

27 oktober - 6 november 2012 30/20/17/15/12/10/6 meter band ssb-cw-rtty