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Consoles, Recorders, Dispatch, Alerting, Paging, Monitoring equipment.

The Daily DX is a text DX bulletin sent via e-mail. To subscribe you have to pay for the daily or weekly subcription and you will receive DX news to your home or office by e-mail Monday through Friday, 50 weeks per year. Includes DX news, IOTA news, QSN reports, QSL information, a DX Calendar, propagation forecast and much, much more.

AirNav live. See live images from my AirNav Radar box here in Clacton on Sea, Essex. Also full setup details.

YF1AR multiband vertical antenna, based on orginal concept by VE7BS. Consist of 6 vertical elements and 6 base radials with a single 50 Ohm feed line.

Pipe your signals to 146 and 445 MHz with one antenna!

Understanding Gain differences, j-pole and end-feed vertical antennas.

Amateur Radio Memory Manager Software for the Mac support many Yaesu Icom AOR and Kenwood radios

A 2W 80 meters transceiver assembled into a toaster case.

Comparison chart for low-band receiving antennas

A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.

5 elements Yagi antenna with an 8.7 db gain

Operating on 160 meters from a city lot is always a challenge. Here's how K9YC does it.

Morse Machine is a tool for learning to read Morse at a good speed, based on the Koch Method

A group dedicated to the HF Kenwood Transceiver TS-590 S

This is an incredibly simple and cheap frequency counter with binary readout, based on the ideas of Onno PA2OHH.

Custom iambic paddles by N3ZN

Why twinlead isn't necessarily a low loss feed line.

Theory of horizontal loop antennas, as discovered by G2PL using a lowered quad antenna and theorized by ZS6AKA

Adventures in amplified GPS antenna construction; an experiment

Sounds of Space Weather by S. McGreevy, N6NKS

Basic tips for DXing

A PDF presentation of a home made moxon antenna for 50 MHz 70 MHz and 144 Mhz. The project is mainly out of surplus plastic Plumbing pipes and clips etc, and also details of how the dimensions were calculated.

Towers by Tashjian, Engineering, Design and Manufacturing

Ham Start, starter kit. Stugy guides, resources, exams, upgrades and morse code. A guide for beginners and license upgraders, Resources for getting started and advancing in ham radio (USA)

Cheap UHF antenna plans for 2 meters and up including 421 1296 and 902 Mhz

If you have space constraint at your QTH for a HF antenna, you can try contructing this HF magnetic loop antenna for 40-20 meters bands

About the G5RV antenna, construction notes and tipical dimensions

Setting up a Raspberry Pi as Remote Server for RTL2832u SDR

This is a design for a stealthy HF multi-band vertical wire antenna using a tree as a supportby G7AQK

The Top-Rated Electrical and Electronic Engineering Calculator for Palm OS

Build An Inexpensive Repeater Controller from a Basic Stamp 1 or 2 By Roger Cameron

This online guide details the microphone pinout for the Kenwood TR-7950 transceiver, specifically addressing the wiring configuration for a dynamic mobile microphone with a **500 Ohm** impedance. It provides a pin-by-pin breakdown for the 6-pin microphone connector, identifying the function of each active pin. The resource specifies that Pin #1 is for the microphone audio (white wire), Pin #2 controls the _PTT_ (black wire), Pin #3 activates the memory down function (blue wire), and Pin #4 controls the memory up function (red wire). Pin #6 is designated as the ground connection, while Pin #5 remains unused in this configuration. The document focuses on the physical wiring necessary to restore microphone functionality to the Kenwood TR-7950, a transceiver capable of **45 watts** output on the _2m band_. It directly addresses the technical challenge of re-establishing correct electrical connections after microphone wires have been disconnected from the connector. The information facilitates proper microphone operation for simplex QSOs and other voice communications. DXZone Focus: Online Guide | Microphone Pinout | Kenwood TR-7950 | PTT Wiring

Radio Scanning in Australia

Make your own interface, two schematics for building an interface using the RTS line by N3UR

RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.

A flex antenna working on 6m and 70cm by K0EMT

FT-817 compared to FT-100 and review

Linear amplifer picture gallery

HB9DNU Karlheinz's blog, hosted on Blogger, presents a collection of personal reflections and observations, predominantly in German. The content spans various non-amateur radio subjects, including Swiss political initiatives, economic discussions concerning banks like UBS, and social commentary. For instance, an entry from February 2008 details the Swiss vote on a combat jet noise initiative, highlighting the debate between tourism concerns and national security. Another post from October 2008 critiques the 500 billion Euro bailout package for banks, calculating its per-capita cost for German citizens and referencing earlier blog entries from March 2006 and June 2007 that discussed UBS salaries and Raiffeisenbank issues. These entries often reflect Karlheinz's personal perspective on current events. The blog also includes lighter, more personal notes, such as a February 2009 entry about a video produced by his grandson, and observations on local events like a bird exhibition in Contone or a scenic train ride through the Centovalli, demonstrating a broad range of interests beyond the ham radio hobby.

TX3A online log for Chesterfield Islands 2009

[TowerTalk] Why does Cushcraft R7 work so well without radials?

ST2NH blog - first ham blog from africa fatures QRP,Homebrew,news,links

Article on various type of transmissium medium, like parallel lines, twisted pairs, shielded pairs, coax lines

2 meter kilowatt linear amplifier

Article on a 2 and 6 meters halo antennas that does not require a mast has a very low part count and can easily be built with a minimum of tools.

Ham Radio repair of all major brands and models, located in Carrollton, Texas, which is just north of Dallas, and have been serving the Amateur Radio community for over 20 years.

K0EMT mobile antenna mast mount

allows a Macintosh computer to communicate via packet radio with the amateur packet satellites currently in operation using the 'PACSAT' protocols

Calculating Antenna Wind Load

A 9:1 voltage unun using a T-200-2 powdered iron toroid core to feed a long wire multiband antenna.