TM 5-6675-318-14
Table 9-2. METER AND AMATEUR RF BANDS - Cont
BANDIWIDTH
DESCRIPTION
11 m Band (25.6-26.1 MHz)
Used for long-distance international broadcasts during heavy activity of solar
spots.
Like 13 m band, its condition changes from time to time. When condi-
tions are good,
r e c e p t i o n i s e a s y , a s t h e r e i s n e i t h e r n o i s e n o r i n t e r f e r i ng
s i g n a l s.
AMATEUR BANDS
160 m Band (1.9 MHz)
80
40
20
15
10
Also called “top band,”
and among amateur bands it has longest wavelength. It
is good for short-distance transmissions.
m Band (3.5 MHz)
This band is generally used for short-distance broadcast. However, depending
on season and time, it can be used for DX traffic communication.
m Band (7 MHz)
When solar spots are least active, this band is most efficient for DX
communications.
However, its allotted bandwidth is narrow and it is suscepti-
b l e t o i n t e r f e r i n g s i g n a l s .
m Band (14 MHz)
Also called “amateurs’ main band.”
Its listening area changes with time and
season.
It can be used as world-wide traffic communication band, and it is
usually possible to receive broadcasts from every country.
m Band (21 MHz)
When solar spots decrease, DX station and traffic communication signals are
d i f f i c u l t t o r e c e i v e .
When spots are active,
i t i s p o s s i b l e t o r e c e i ve
low-power DX stations as surprisingly strong signals.
m Band (28 MHz)
Among amateur bands, this has one of higher frequencies (HF). This band has
both HF and VHF characteristics and more features than 15 m band. When solar
spots are active, You can tune into every distant DX station.
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