Friday, December 28, 2012
Nixie Tube Clock
"In the pioneering sprit of amateur radio and open source hardware and software, I've assembled a collection of information and engineering plans for a variety of amateur radio projects. These projects cover a wide range of disciplines." - KD7LMO
From the GNU radio web site
"GNU Radio is a collection of software that when combined with minimal hardware, allows the construction of radios where the actual waveforms transmitted and received are defined by software.
What this means is that it turns the digital modulation schemes used in today's high performance wireless devices into software problems."
The latest in SDR (Software Defined Radio) technology. Here are some projects and information that rely on the GNU Radio and USRP (Universal Software Radio Peripheral).
Tuesday, December 06, 2011
My Start as a Ham - Ralph's Story - "I suppose my interest in things electrical began when at a very young age I poked a metal hairpin into an electrical outlet. To this day, I vividly remember the amazing flash and bang that resulted! Of course, I wanted to know why that happened. It was a few years more before I learned to read, and found out about electricity."
Ananth Notes- Thank god you survived to tell the story, this was a Jolt of a start. Very few people survive this. I would like to add …
All Mains Inlet Sockets should be Shuttered, so that such a thing does not happen again to any child again. Another Law, No Mains Socket should be less that 5 feet above the ground level.
Then we should all move to a 24V home voltage standard, Read more at my Tech blog..
Then ralph has many projects with educative information. A RF Ammeter the Easy Way. A 400 Watt 60 Hertz Power Inverter. These are interesting to study.
The design of switching supplies is a bit more involved than traditional "big iron" transformer power supplies. When taken step-by-step, however, it is quite possible for an amateur to design and build a working high power switching power supply. This article describes a high power, high voltage switch mode power supply designed to operate a KW level RF power amplifier.
Home brew Litz Wire
The Litz wire was fashioned by taking two parallel strands of #18 AWG wire about 115 feet long and twisting them together in a clockwise direction with an electric drill until the twisted wires had about two turns per inch. The twisted wire was then cut into four equal length and laid side by side.
Tuesday, June 21, 2011
G8NQN - Martin - Keadby North Lincolnshire UK
He has links to various sites that cover the RAE exam theory in detail, this section can be used as a reference for those taking the RAE at a training centre.
CI-V Interface Controller
As you can see the circuit is very simple, and uses the Max 233 CPP RS232 interface chip to control the data flow, this interface works very well with programs like Ham Radio Deluxe etc, and I am now using this interface on a daily basis.
So far I have only built this circuit on a small piece of Veroboard, but that's where all good projects begin, I am not going to waste time going into the construction of this interface due to its simplicity, however if you want any details please email me you can find my email address on QRZ.COM, (or join my forum) link to that on the homepage.
Wednesday, April 13, 2011
John Owen has made Enriching Electronics Pages at vwlowen.co.uk. There are many Ham Radio projects too.
A highlight is the "Build A PICAXE Weather Station." This is quite Exhaustive and Detailed.
Here he teaches in simple tongue, The method and steps to towards the first project and that too, with the Sacred SG555 Timer.
Here is where he dazzles, He has developed very useful Calculators to make your Numbers Game a Piece of Cake.
Monday, December 21, 2009
Why learn the Code ? By LA5EKA, Gisle J. Bjoerneseth
This article is also posted on EHam, in the Norwegian "Amatoerradio" magazine April 2003 edition and in the MVARC April 2003 newsletter, Ye Olde RF Output.
Sunday, November 29, 2009
N5ESE - Gizmos for QRP Ham Radio
N5ESE's GIZMOs For the QRP Homebrewer and Ham Operator
"Everybody loves a "gizmo". Hams have a weakness for them. Gizmos can be expensive for full-power amateur radio equipment, but homebrewing QRP gizmos is "cheap and easy". Most of the projects here cost less than $20 (or nothing, if you have a modest junk box), and take only a few hours to build). Most are even suitable for the novice builder. And all have real practical value, especially for homebrewers and QRP operators. "
Saturday, September 29, 2007
Monday, September 17, 2007
WB4HFN Amateur Radio Website
Antenna construction, digital communications, operating tips and practices to handling CATV interference
Amateur Radio And Resource Information
Heathkit Vintage Amateur Radio Equipment
One of the first all solid state radios produced by Heathkit Company in the mid 1970's was the SB-104 Transceiver.