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Descripció
del contingut dels enllaços
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Crystal Radio Resources:
"This site reflects the stuff I have learned and relearned, and also
lists the resources I found on the web that might be useful to you as
well". |
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Building a very
simple AM voice transmitter: "If a crystal radio is the distilled
essence of a radio, this transmitter is the matching distilled essence
of transmitters". Aquí hi ha de
tot. |
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Asociación
Española de Radioescucha (AER): "La AER es una asociación
española registrada legalmente, sin ánimo de lucro y de
carácter cultural y recreativo, dedicada a la promoción del
diexismo y la radioescucha en el Mundo, especialmente en España
y América Latina". Hi ha llistats de totes
les emissores en OM (vegeu l'apartat "LISTAS DX"). |
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Peter Parker's
Project Page: "A collection of homebrew projects for the
amateur radio enthusiast. A few projects include full constructional
articles, but most have just schematic diagrams and a few notes". Hi ha la descripció d'un adaptador en L.
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Front end design
of antenna: This side will explain how to calculate the tap
point on a coil to match the antenna input for receivers. |
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CRYSTAL SET DESIGN:
This work is the result of about ten years part-time investigation
of crystal radios from an engineering perspective. |
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Building a PI-L
antenna tunner: After I got the QRP spy transmitter going and
found it had an objectionable harmonic output on 20 and 15 meters, I decided
to build an antenna tuner. The one and only circuit I had considered was
the venerable Pi-L, which is an excellent attenuator of harmonics and is
capable of loading up almost anything. |
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Pi Section Coupler
Solves Antenna Problems: Inexpensive gadget tunes antenna
for better DX. |
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Ian Purdie's Amateur
Radio Tutorial Pages: Passive Antenna Re-radiators to function
as Q Multipliers. |
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Regenerative receiver:
This is a compact three transistor, regenerative receiver
with fixed feedback. It is similar in principle to the ZN414 radio IC
which is now no longer available. The design is simple and sensitivity
and selectivity of the receiver are good. |
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Audio Circuits:
Amplifiers, audio meters, etc. |
