The new electronics and amateur radio website of
SV3ORA
(ex SW3ORA)
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Last updated: 22-4-2012
Preface
Welcome to my new website! After about
nine years (from 2001) of maintaining the old website, which had many schematics
of other people, I have decided to make a new one with schematics created and
tested by me. This website contains my own RF experiments and considerations as
well as information and photos from wonderful places I have been and other
activities of mine.
Places that I have visited
A trip on a local passive repeater
Software I have developed
The CDW communication mode
The XDOS
Theory and tutorials
Assembly tutorial and information (Tutorial, my notes, my programs for the PIC)
My
electronics and RF techniques 
Reliability of
data storage media
A generalized prototype
board for digital electronics work
The simplest way to program and
read the PIC16F84 MCU
Measuring and selecting the actual received frequency in regenerative and direct conversion receivers
Ultra narrowband adjustable
shape and bandwidth crystal
phasing filter
How to draw
ARRL-style schematics
Making precision PCB coils
My
Circuits and Projects
A transistorized 4-bit digital computer
made out of discrete DTL
My High
Fidelity audio page
A
blinking LED Christmas tree
HF
all-band tuneable bandpass filter
Development of a Tele-control Home Appliance Controller (my MSc project)
First pages,
Main report,
Schematics and datasheets
A simple, failure immune 4-bit digital computer made out of common TTL chips
The ZX-80 computer (A useable home computer built REALLY from scratch. This
includes PCB etching)
The Jupiter Ace computer (A useable home computer built REALLY from scratch. This
includes PCB etching)
1-30MHz deluxe
crystal controlled CW/CDW transmitter
20KHz to 65MHz sinusoidal
VFO
1-30MHz ultra low
noise and distortion crystal oscillator
LED Zeppelin game revised to use only transistors
Control the
transmitter from the computer
Coaxial
built transverter for the X-Band
The SkyNet project
(Low data rate laser data links)
The homemade PC-XT project
(A greater scale PC-clone home computer. Some parts are in KIT form)
The vacuum tube poly-synth project (VCO
section)
Poor man's laboratory equipment (nice upgrades to your lab, at a fraction of the cost!)
Semiconductor analyzer (For BJTs, mosfets and diodes. An Elektor project)
Useful Links
S53MV website.
Microwave and advanced RF projects.
JF1OZL website.
Amateur radio projects.
Greek Microwave Group
website. Amateur group for microwave radio projects.
YO3DAC - VA3IUL website.
Amateur radio projects.
LA8AK website.
Amateur radio projects
SM0VPO - G4VVJ website.
Amateur radio projects.
Hans Summers. Radio,
Electronics and Computing Projects.
QRP and SWL homebrew
equipment.
Reverse engineering simple
equipment.
My
professional website.
How to contact me
The email to contact me is:
That is, skylimit zero zero zero at
gmail.com. Any feedback is kindly appreciated.
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Disclaimer
You are free to copy and use everything on this website provided that you do not alter the content and you clearly define the source that it has been copied. All material on this website is provided as is without any guarantee. Many of the material is my own thoughts and do not necessarily represent the truth. It is provided for you to read in order to understand the basic principles of operation. You may build and use any project only at your own risk and you are the only one that are responsible for its use. You should always consider your country regulations before building anything.
