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The new electronics and |
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Last updated: 20-5-2013 |
Visitors since 2001 |
Press CTRL + F5
on your keyboard |
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40% Discount tickets for TensorCAD! |
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  |
|
|
The new electronics and |
|
|
|
Last updated: 20-5-2013 |
Visitors since 2001 |
Press CTRL + F5
on your keyboard |
|
|
40% Discount tickets for TensorCAD! |
|
|
Προς πώληση (Νέο!):
Θάλαμος UV για έκθεση πλακετών διπλής όψης, δικής μου κατασκευής
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 mostly my own RF experiments and considerations as
well as information and photos from wonderful places I have been and other
activities of mine.
LATEST NEWS
A reflection coefficient bridge combined with two mini dummy loads, for impedance measurements
Quick menu
Have
you got any old unwanted electronics?
Plain PCBs, failed projects, old radios or any other damaged electronic
equipment.
Donate them to someone who really cares about these.
Post them to me and I will undertake all shipping costs!
Theory, information and tutorials
Assembly tutorial and information
(Tutorial, my notes, my programs for the PIC)
Diodes
evaluation for crystal sets - A simple test
Mechanical
excellence - A tribute to the watch movement
Mechanical
excellence - A tribute to the wind-up gramophone engine
Linear
UHF vacuum tube circuits
Vacuum
tube television
General
diode applications
Passive
crystal receivers
Tunnel
diodes
Varactor
diodes
Schottkey
diodes
Rectifier
diode audio amplifier
Passive
DSB transmitter
Passive
CW transmitter
Ferrite
core mixers
Magnetic
amplifiers
Transformers
Electromechanical
transmitters and receivers
Neon
lamps
Radar
history
The
phasitron tube
Thermoelectric
generator
Analog
computers
Logic
gates technology
TV
transmitters
SSB
transistorized CB
Barlow
Wadley loop
Radio spectrum frequency allocation
chart
dBm, mw, Vpp, Vp, Veff conversion table
Optimum wire size for
RF coils
Observations on
ferrite rod antennas
Designing
wideband transformers for HF and VHF power amplifiers
Crystal parameter
measurement and ladder crystal filter design
Quartz crystal
parameter measurement
Crystal filters with variable
bandwidth and constant center frequency
Ultra
low noise active devices on a budget
A
simple and good program for mechanical and architectural design.
74LSxx
series chips internal schematics
Natural radio
The sounds of the earth and other natural sources
and simple equipment
E-field
VLF natural radio receiver
H-field
VLF/ELF/ULF natural radio receiver (in development)
Electronics and RF techniques 
Homebrew your own
SiC LED
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
Circuits and Projects
Digital electronics
A transistorized 4-bit digital computer
made out of discrete DTL (in development)
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 (in development)
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. In development)
The homemade PC-XT project
(A greater scale PC-clone home computer. Some parts are in KIT form.
In development)
RF electronics
10GHz
gunnplexer (in development)
Magnetic
receiver (in development)
Fine
tuning the SM0VPO HF amplifier for better performance
An ultimate quality
shortwave transceiver (in development)
The fully
transistorized radio project
Smart
KIT 1W FM transmitter reverse engineered
Single span, high spectral purity oscillator 3KHz-30MHz (in development)
A simple to assemble regenerative SW receiver
My 10GHz
SDR phasing SSB transceiver (in development)
HF
all-band tuneable bandpass filter
1-30MHz deluxe
crystal controlled CW/CDW transmitter
Ultra
wideband sinusoidal VFO with AM capability
1-30MHz ultra low
noise and distortion crystal oscillator
Control the
transmitter from the computer
Coaxial
built transverter for the X-Band
Audio electronics
My High
Fidelity audio page
Other electronics
A
blinking LED Christmas tree
The
LED Zeppelin game became the LED Zapper! (a game for the blind or the deaf)
The SkyNet project (Low data rate laser data links, in development)
The vacuum tube poly-synth project (VCO
section)
Poor man's laboratory
equipment (nice upgrades to your lab, at a fraction of the cost!)
A
BASIC computer designed especially for lab use (in development)
A
low frequency circulator/isolator
A mini reference oscillator
A
return loss bridge for impedance measurements (in development)
A mini dummy load for impedance measurements (in development)
Solid state UV PCB exposure (in development)
Semiconductor analyzer (For BJTs,
mosfets and diodes. An Elektor project)
Software I have developed
The CDW communication mode
The XDOS
Mechanical work
Making
a special screwdriver for the lab (under development)
A
table for the lathe
How
to mill an enclosure on a small lathe (part of another project)
Places that I have visited
A
trip on a passive repeater
Rhodes island
Santorini island
Samos island
Lefkada island
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.
Cool homemade stuff
homemade components.
Reverse engineering simple
equipment.
My
professional website.
Elm
Chan website. Great microcontroller projects.
Radio
waves below 22KHz.
How to contact me
The email to contact me is:
That is, skylimit zero zero zero at gmail.com. Any feedback is kindly appreciated.
Sign in my guestbook
Type your message below:
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.
