SGC STEALTH Kit Instrukcja Użytkownika

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Active
Antennas
for 2009
Juicy programs aren’t aired only in
the evening, when scripts can be
tailored for your region. Increas
-
ingly, “off beamsignals are being
heard by dayparticularly after
-
noons and at twilight.
Thanks to the scattering properties
of shortwave, you can eavesdrop
on these to hear what’s being said
to other parts of the world, often
in English. Variations in what’s be
-
ing told to different audiences can
reveal much about a country’s real
intentions.
Most daytime signals are not
strong, but a high-performance
antenna can help open up these
new worlds. The gold standard is
an outdoor wire antenna that is
unamplified—passive. Trouble is,
these are lengthy, a pain to erect
(think “big trees”) and require turf.
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Podsumowanie treści

Strona 1 - Antennas

Active Antennas for 2009Juicy programs aren’t aired only in the evening, when scripts can be tailored for your region. Increas-ingly, “off beam”

Strona 2 - Loop antennas

A C T I V E A N T E N N A S 1 7 7What’s not to like? An ordering procedure that’s inconvenient and démodé. There are no dealers outside the United

Strona 4

A C T I V E A N T E N N A S 1 6 9So if you lack acreage, face community restrictions or are allergic to high-wire gymnastics, consider an active a

Strona 5

1 7 0 P A S S P O R T T O W O R L D B A N D R A D I Ousually from the front panel’s digital display. With these, a proximate antenna should be placed

Strona 6

A C T I V E A N T E N N A S 1 7 1PASSPORT reports on the first and gives tips on the third. Yet, much depends on the second: local conditions. Yo

Strona 7

1 7 2 P A S S P O R T T O W O R L D B A N D R A D I Osusceptible to inductive pickup of local thunderstorm static, our antenna’s ampli-fier has not suf

Strona 8

A C T I V E A N T E N N A S 1 7 3Greater size impacts performance, too. The loop receiving element’s length that we chose provides full-wave reson

Strona 9 - ASSPORT test site

1 7 4 P A S S P O R T T O W O R L D B A N D R A D I OCons: Lower gain than ALA 100 within shortwave spectrum above 5 MHz or so; dif-ferences range fro

Strona 10 - Passport’s Choice

A C T I V E A N T E N N A S 1 7 5**** Passport’s ChoiceWellbrook ALA 330SOutdoor-indoor loop. Active, remote, broadband, 2.3–30 MHzPricing: ALA 3

Strona 11

1 7 6 P A S S P O R T T O W O R L D B A N D R A D I Owinds until the locally procured pipe cou-pling to which we had attached the antenna snapped. Man

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