| Index of
Topics |
| Technical [N]ovice [I]ntermediate
[G]eneral [S]uperior
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[I]
NEW
(preliminary, last upgrade 2006-12-11)
The "Pamperita" antenna
A novel
and interesting approach to a classic trap multiband antenna that will solve a common mounting problem.
Very practical to substitute "long wires", to rise with kites or to hide
of the neighbors...! it doesn't needs transmatch...!
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[N]
Very Oldie! Some
of astronomy
(only in spanish) Published
originally in 1992 via on Packet Radio and awaiting being rewrited with good
images. Basic notions of astronomy for Hams. If you have imagination there
are not problems with it...
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[I]
NEW (preliminary,
last upgrade 2006-12-13)
The Trap-Balun (an
improvement to the "Choke Balun").
Creole technical novelty:
A light monoband balun that presents bigger impedance than the popular and
efficient choke balun on working frequency
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[I] NEW
(preliminary, last upgrade 2008-02-07)
The "Syringe" antenna
revised (an improvement to the "Resonant Feed Line Dipole").
An end feed half-wave monoband dipole having same
feed impedance of standard center feed dipole. Ideal to rise with kites or
to make firm on the CATV posts |
|
[N]
Very Oldie! How
operate in Packet Radio
(only in spanish)
An old article had published many years as
Packet bulletin. Can still be useful for those who begin today in this
modality. Use of BBS, Bulletins, Messages, etc. |
|
[N]
UP-TO-DATE
"Hambukito" Project
(only in spanish)
The "Hambukito" project, it is an
intent of endowing us with a little book in our language that summarizes
most of the characteristic aspects of our activity. From the disappearance
of the Amateur Radio Handbook spanish translation that Arbó Editorial
carried out, our comarcs have lost a valuable reference point.
It is my intention to pick up something of that "Sacred Fire" as it called
it by my friend Ruben Andrés (LU 1CGI) and modestly try to vivify the flame.
(There is already abundant material that, although it is in revision state,
can be useful now...) More information and material in the project's page
... |
|
[I] The of
the sigmática (underground) antenna enigma (Last
upgrade 2005-08-08)
(only in spanish)
A controversial antenna. Truth, myth or
fantasy?. had Julio Verne used it in his center of the Earth trip?. A
serious study of the antenna that Fabio Zerpa didn't cheer up to publish... |
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[N]
The annoying noises, the basic thing
(Last upgrade 2003-03-27)
(only in spanish)
Static, Noise of artificial origin.
Generalities. When it is possible to eliminate it. The antennas and the
noise...
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[G]
Dialogue with J...
(Last correction 2003-08-01)
(only in spanish)
An amusing technical dialogue between the
radioaamateur and academic world, Or "About a project of a North American
University where the Argentinean Ham Radio put the tablespoon... " |
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[I]
That antenna is
not so difficult (Last upgrade,
rather cosmetic, 2006-12-31)
(only in spanish)
To understand once and for all, why the "A"
antenna it is "better" that "B" antenna...
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[N]
Frequently upgraded
Ham FAQ.
(Last upgrade 2006-12-12)
(only in spanish)
Answers to questions frequent techniques of
the Hobby on different topics. As in grocery, of all a little...
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[I]
The magnetic loop antenna
(Last upgrade 2002-08-28)
(in spanish)
An antenna that it can really be the solution
for efficient communications in low bands when there are not space neither
height. Used by the North American army as campaign antenna, with theorical
calculations and práctical data...
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[N]
The limits
contacts
(Last upgrade: 2000-08-28)
Can we receive signs that are 20 dB below the noise of our receiver? Is it
possible to communicate with equivalent powers to those that it uses a
neuron?. A fascinating experience within your reach...
Also an analysis of the PSK31 (in DigiPan) in action, copying a sign -10 dB
below the noise...!!!
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[S]
Calibrated noise generator (preliminary,
last upgrade: 2000-09-07)
(only in spanish)
Tips for construction of a calibrated thermal
noise generator with common components.
|
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The
wonderful Series - Parallel transformation
(Last update
2000-06-14)
(Idem
en español)
A very common technique that
solves many necessities of impedance matching. Simple and
effective method that also allows to understand the
principles involved in many circuits such as transmatches,
antenna hairpins and much more...!
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[G]
Design
notes on direct conversion receivers. Endless
project.
(Last update: 29/08/00) (only in Spanish
language site, don't translated yet).
A modern direct conversion
receiver from 1 to 500 MHz. Based in legendary Rick Campbell's
"R2". Design notes. Circuits and recommendations.
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[I]
Making
radiofrecuency inductors
(last updated 2006-09-09)
(only in spanish) Solving mysteries... How to
calculate inductores, solenoid and toroids. Q Calculation, distributed capacity and
effective inductance. Coils won't be a problem anymore...!
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[I]
Small
mythology about radiation patterns (Last update 14/08/00)
(Idem
en español)
The radiation diagrams and how to
take advantage of them is something simple of understanding,
unaccountably around they spread myths that prevent to take
advantage of the best in our antennas...
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[I]
Using
75 Ohms lines to feed 50 Ohms antennas
(Last update 14/08/00) (Idem
en español)
If you have had some doubt about advantages of using economic
75 Ohms lines of. Here you
will find those answers that will tranquilize you.
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[N]
Rays!!! (Last update 14/08/00)
(only in spanish)
Is the lightning rod necessary in
your tower? Is it necessary ground it?. Your security and the one of
yours depend on understanding how and why.
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[N] Radial mythology
(only in
spanish)
A paper with varied
concept errors that survives all the times (in spite of
the handbook)...
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[I]
How phasing 4 dipoles to get a
colineal
(Last updated 2006-12-15)
(only in
spanish)
It is very easy to make. The
concept is applicable also to setting in phase of directional
antennas arrays.
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[S]
The annoying noises, the calculations...
(Last update
29/08/00)
(only in
spanish)
A detailed explanation of such questions as:
The signal to noise ratio, Noise Factor, Noise Figure,
receivers sensibility , etc.
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[N]
How the GPS
works
(only in
spanish)
A very simple explanation of operation
this exciting instrument.
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[N]
The radio in the sport navigation
(only in spanish)
Common applications of the
radio in this nobleman deports. It can be good to pass him the
link to some friend that navigate (for the water, not for the
Internet...)
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[I]
Interplanetary
communications (Last update
17/08/00)
(Idem
en español)
Amateur radio interplanetary communications
possibilities. Use
of common equipment. Range. Possible communications with
future missions, manned or not, to Mars. To begin to
investigate...
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The
SWR. That great confusion...
(Last update
26/08/00)
(Idem
en español)
Mistaken concepts that incredibly
overcome time barriers the and remove peacefull dreams to the fans. Here you will find
how to trhow it away...
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[S]
The
Smith chart, practical uses in the amateur radio
(last
update 2005-10-16).(only
in spanish)
An article that tries to fill a
hole in the amateur literature, especially those of Spanish speech. It is not for beginners, but who is interested
seriously on transmission lines and the impedances matching will find this
useful and instructive
article.
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[S]
Analysis
of the normal propagation conditions in F.M.E.
- F.U.E. systems
(last update 2004-05-25)
(only in spanish) A quite exhaustive explanation of
the way in usually propagates a of VHF / UHF signal.
Demonstration of the most common formulas. More mathematical
that would be suitable in an amateur site, but
if you are one of those that want to know all the "reasons",
here you will find at least one...
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[N]
How
to communicate with a SSB station using your FM
rig (only in
spanish) It is not necessary to make
anything, it works without touch anything. Try it...
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Opinion
|
¿Quo Vadis?
(only
in spanish)
¿Must to change tje Ham
Radio?. Essay.
|
Comprar tecnología ¿Un dilema?
(only in
spanish)
The rig, another electrodomestic? ¿The thing is most
important than us?
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Radio CF stories |
|
An unhappy world:
A satiric story for "experts"
(do read: Hams, especially argentinian hams...)
(only in
spanish) |
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The mutation:
Another satiric story for hams
(any likeness with the reality is a pure intention......)
(only in
spanish) |
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Normal C.F.
storiess
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Invasion:
Dramatic-satiric story. If you
have mor of 40 year old an you ar latinoamerican yuu are
sought something of this...
(only in
spanish) |
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500 years:
A possibilitu to think posibilidad para pensar...
(only in
spanish) |
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Memories:
Un humilde homenaje a H. P. Lovecraft. (only
in spanish) |
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The home:
Story of de Rubén Mileca (ex LU 1EHQ).
Very good...
(only in
spanish) |
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