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Elite
Sol Marbela, ANYERI
Hard
Rock Hotel BALI
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Medium
Frequency (300 kHz - 3 MHz):
The
only amateur medium-frequency band is situated just above the domestic AM
broadcast band. Ground wave provides reliable communication out to 150 km
or during the day, when no other form of propagation is available.
Long-distance paths are made at night via F2 layer.
1.8-20
MHz (160m)
The
Top band, as it is sometimes called, suffers from extreme daytime D-layer
absorption, Even at high radiation angles, virtually no signal can pass
through to the F layer, so daytime communication is limited to ground-wave
coverage. At night, the D layer quickly disappears and worldwide 160m
communication becomes possible via F2 layer skip. Atmospheric and man-made
noise limit propagation. Tropical and midaltitude thunderstorms cause high
levels of static in summer, making winter evenings the best time to work
DX at 1.8 MHz. A proper choice of reeiving antenna can often significantly
reduce the amount of received noise while enhancing desired signals.
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Acknowledgment:
The
contents of this Page (Ham Radio), may derived (in part or all) from many
sources, including (but not limited to): The 2000 ARRL Handbook For Radio,
QST Magazines, QRZ.Com, QSL.Net and many other reference sites.
If
for any reason the contents violate rules or regulation, please E-mail me. |
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