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."
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.
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.
"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."
"One day I noticed a project, obviously homebrew, mounted on a piece of plywood, and nearly covering the worktable. When I asked him what it was, he glowed as bright as the half-dozen tubes that lit up when he turned it on. Twenty seconds or so later, out spews from the speaker the cracklings and whistles of 40 Meter CW. I was amazed, and at that moment the homebrew bug bit me hard. I was determined to build something myself, and get my ham ticket."
"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".
N5ESE's GIZMOs For the QRP Homebrewer and Ham Operator
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. "
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.