TM 5-6675-318-14
Table 9-2. METER AND AMATEUR RF BANDS - Cont
BANDWIDTH
DESCRIPTION
60
49
41
31
25
19
16
13
m Band (4.75-5.06 MHz)
Like 120 m and 90 m bands and is used chiefly for local broadcasts in tropical
regions.
m Band (5.95-6.2 MHz)
Mainly used for short and medium distance international broadcasts and local
b r o a d c a s t s.
m Band (7.1-7.3 MHz)
Propagation of this wave is similar to that of 49 m band. It is chiefly used
for medium- to short-distance broadcasting.
m Band (9.5-9.775 MHz)
Heavily used for international as well as local broadcasts. Shortwave
b r o a d c a s t s o f d i f f e r e n t c o u n t r i e s a r e t r a n s m i t t e d i n t h i s b a n d a n d , i f
receiving conditions are favorable, it is possible to receive many stations
at every 5 kHz.
m Band (11.7-11.975 MHz)
Propagation of this wave is similar to that of 31 m band. Many international
broadcasting stations with strong output signals use this band throughout the
y e a r.
m Band (15.1-14.45 MHz)
Chiefly used by international broadcasting stations and is regarded as “main
band."
From this band to higher frequency bands, reception becomes difficult
as number of solar spots decreases.
m Band (17.7-17.9 MHz)
Used by international stations for purposes similar to 19 m band, but because it
is greatly affected by any slight change in solar spots and in differen t
seasons, reception is often impossible.
m Band (21.45-21.75 MHz)
U s e d f o r l o n g - d i s t a n c e i n t e r n a t i o n a l b r o a d c a s t s . I t i s u s e d r e g a r d l e s s of
seasons when solar spots are active.
Condition of this band changes from time
t o t i m e.
9-45
