The story of homo ludens
radiactivus
Amputating a TM-241's
heatsink
Repetidoras
de Radioaficionados de Chile: A table of Chilean ham radio
repeaters,
text in Spanish.
Recordando
a Emilio: In Memoriam XQ5BIB, in Spanish.
La
Antena Multibanda XQ6FOD
Tópicos de radio: In Spanish language.
Estadísticas de la
Red
Nacional de Emergencia
Selección de bandas
Micrófonos
preamplificados
La mala
propagación
Reportajes de
señales
Defectos en las
transmisiones
¿Estaciones rusas en 40
metros?
El famoso balun
Tarros viejos
¿Quién es el dueño de la
frecuencia?
Baterías,
fuentes de poder y lloriqueo
12
Volt fluorescent lamp drivers
Active
Hi-fi speakers
13.8
Volt, 20 Ampere linear power supply
13.8
Volt, 40 Ampere switching power supply
Altimeter/Variometer
for free flying
Linear
solar panel regulator
Switching
solar panel regulator
SWR
meter for 1 to 1300 MHz
DC-DC
converters
Plant
watering timer
Room
heating controller
Transformers
and coils: Not a project but a tutorial about magnetic
design.
40
meter SSB QRP transceiver
Mercury
battery replacement
An
automatically tuned HF mobile antenna
Page
2 Page 3 Page
4 Page
5
144MHz
to 50MHz receive converter
Controller
for rotary film processor
Thermal
design: Another tutorial.
Small
audio amplifiers
12
Volt powered, 4x15 Watt quad audio amplifier
FodTrack:
My world-famous realtime satellite tracking system!
Dynamo
current and voltage regulator
Hygrometer
and hygrostat
Equivalent
Series Resistance meter
Small
AM transmitter
80
Watt FM stereo transmitter
Single
cell LED flashlight
12V powered
12V battery charger
Electronic Load
Controller for microhydro
Awfully Antique
Audio Amplifier
The Power
Jack 3500W inverter
Practical transformer
winding
A homemade replacement
for the Yaesu FTS-8 subtone encoder
High
efficiency, legal limit, solid state HF power amplifiers:
Just theory, not a practical project yet.
Digimodes improvement for
the TS-450/690
Voice
identifier for a repeater station
Accelerometer
High
power LED flashlight
160V 3A DC motor
power supply
GPS-based frequency
standard
Version
#2 of my active HiFi speakers
Portable
oscilloscope
Power inductor tester
Voltage
regulator for synchronous generator
Control loops
Multimeters
KISSCAD
freeware
Building an SDR around
a Red Pitaya
Designing and building
conical horn antennas
Improving
the LC100-A inductance & capacitance meter
Ferrite
core loss in HF power applications
Voltage regulator for
brushless synchronous
generator
with harmonic excitation winding
A
50W LDMOSFET HF linear amplifier for the Red Pitaya
Improved
single-cell LED flashlight
Spot welder using microwave oven transformer
Quick
and dirty Geiger counter
15-Band
World Receiver
T12
Soldering Iron Temperature Controller
RF power
amplifier design
Ferrite
core loss meter
Making
PCBs at home with a laser engraver
The
truth about electric cars
Units
of measurement
Not
enough jobs?
The
throw-away society
The
Canon ink-wasting machine
Nature
Nature 2
Setting up camp
Improving the road
Building the little
cabin
Installing a water
supply
Eruption of the
Llaima volcano
The
microhydro installation
Building the round
house
Snow
A dust free
circular saw
A
compressor made with fridge technology
The NPW fan clutch scam