Alinco EDX-3 Instrukcja obsługi - Strona 6
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ANTENNA SYSTEM
Antenna for ship
Required antenna element length
Required antenna element length to achieve full performance varies
according to the lowest frequency:
The lowest frequency
1.9 MHz band (1.8MHz) 12m; 39.4 feet or longer
3.5 MHz band
Undesirable antenna element lengths
AVOID multiples of 1⁄2λ (half wavelength) for antenna element lengths,
since tuning becomes difficult and may cause damages to the tuner.
L : Antenna element length to be avoided [m]
f : Operating frequency [MHz]
n : Natural number (n = 1, 2, 3, ...)
L =
[Example]
At an operating frequency of 14 MHz, avoid the following antenna element
lengths:
L =
1 m 39 inches
[Installation]
Backstay operates as
a long-wire antenna.
5
7 m; 9.8 feet or longer
300
1
×
n
×
f
2
300
1
×
×
n
10.7m, 21.4m ...
14
2
Insulator
Insulator
Required antenna element length