Icom AH-4 Bedienungsanleitung
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1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 JapanA-8295H-1EX- Printed in Japanw
© 1997–2012 Icom Inc.
Tuning is required for each frequency. Be sure to retune
the antenna before transmitting when you change the fre-
quency— even slightly.
(eg. IC-7000)
Set the desired frequency in an amateur band. q
•The AH-4 will not operate on frequencies outside of ham
bands.
Hold down [TUNER/CALL] for 1 seconds. w
•“ ” indicator appears while tuning.
Hold down [TUNER/CALL] for 1 second.
“e” indicator stays ON when tuning is complete.
•Whentheantennacannotbetuned,“” indicator blinks,
and the AH-4 is bypassed and the antenna is directly connected
to the antenna connector on the transceiver.
To manually bypass the AH-4, push [TUNER/CALL]. r
OPERATION
Specifications D
•Frequencyrange :3.5–54MHz(withanantennalonger
than 7 m; 23 ft)
7–54MHz(withtheAH-2b)
•Maximuminputpower :120W
•Inputimpedance :50Ω
•Tuningpowerrequired :5to15watts
•Ratedvoltage :13.8VDC±15%
(current less than 1 A)
•Usabletemperaturerange :–10°Cto+60°C(+14°Fto+140°F)
•VSWR :2.0:1orless(exceptantennasa
one half wave or multiple of a one
half wave in length)
•Weight(approximately) :1.2kg(2.65lb)
•Dimensions:172(W) 69.5(H) 230(D)mm× ×
(projectionsnotincluded) ;6.8(W)9.1(D)inches× × 2.7(H)
All specifications are subject to change without notice or obligation.
Options D
•OPC-420 shielded control cable
ShieldedcontrolcablehelpsprotectthetransceiverfromRFfeed-
backandextendsseparationbetweentunerandtransceiverupto
10 m. (cable length 10 m; 32.8 ft)
•AH-2b antennaelement
A2.5mlongantennaelementformobileoperationwithAH-4.Fre-
quencycoverage:7–54MHzwiththeAH-4.
SPECIFICATIONS AND OPTIONS
U-bolts q ………………………………………………………2
U-bolt brackets w……………………………………………2
Flatwashers(M6large)e……………………………………8
Flatwashers(M6small)r……………………………………4
Springwashers(M6)t………………………………………8
Nuts(M6)y……………………………………………………8
Hexheadbolts(M6u×50) …………………………………4
Self-tappingscrews(A06i×30) …………………………4
PL-259 connectors o…………………………………………2
!0Weatherproofcap…………………………………………1
!1Rubbervulcanizingtape…………………………………1
Controlcable*(5m;16.4ft)…………………………………1
Coaxialcable*(5D-2V:5m;16.4ft)…………………………1
*Not shown in the illustration to the left.
INSTRUCTIONS
HF+50MHzAUTOMATICANTENNATUNER
AH-4
Thank you for purchasing the AH-4 HF + 50 MHz AU-
TOMATIC ANTENNA TUNER. The AH-4 matches your
transceiver to an antenna more than 7 m/23 ft long (3.5–
54MHz),ortheoptionalAH-2b(7–54MHz).
Please read these instructions thoroughly before installing
and operating the AH-4.
RNEVER operate this tuner without a solid ground. Always
connect the ground wire to the ground terminal. DO NOTuse
the mounting plate as a ground terminal.
NEVERtransmitortunewithoutanantennaconnected.Fail-
ure to use an antenna will damage the tuner.
RHIGH VOLTAGE!NEVER touch the antenna while trans-
mitting or tuning. Place the antenna in a position where you
are sure it will not be touched.
DANGER!
WIDE TUNING RANGE ❍
TheAH-4providesreliablematchingfrom3.5MHzto54MHz
whenusingatleasta7m(23ft)antenna;or7MHzto54MHz
when using the AH-2b .antennaelement
AUTOMATIC DIGITAL CONTROL TUNING ❍
Thebuilt-in8-bitmicroprocessorchoosesthelowestSWRusing
more than 1,040,000 different LC (coil/capacitor) combinations.
45 FREQUENCY MEMORIES FOR FAST TUNING ❍
The LC combinations of 45 previously-used frequencies are auto-
maticallymemorized.Onceafrequencyismemorized,theAH-4
tunes on that frequency in less than 1 second. Note that the AH-4
doesnotmemorizeafrequencywhichisnormallytunedwithin2.5
seconds.Memoriesareretainedonlywhenthepowerison.
WEATHERPROOF DESIGN ❍
The AH-4’s tightly sealed plastic case allows convenient mount-
ing virtually anywhere. The AH-4 can be mounted outdoors under
your antenna.
0.3 W RADIATED POWER ❍
Radiatedpowerduringtuningislessthan0.3W,minimizinginter-
ference to other stations.
✍ NOTE:
TheAH-4canbeusedwithmostofIcomHFtransceiver,
whichcoversHFthrough50MHzbands.
However,theIC-706andIC-736canonlybetunedinthe
3.5–30MHzrange.
FEATURES
SUPPLIED ACCESSORIES
Ground terminal
Mounting plate
q
w
e
r
t
y
u
i
o !0
!1
CALCULATION OF UNDESIRABLE ANTENNA LENGTHS
Length of
half wave(½ )λ=300 ×1
Operatingfrequency(MHz) 2
[EXAMPLE]Antenna lengths to avoid whenoperating at 29.00
MHz
Multiple
of ½ λ=300 ×1×(1, 2, 3…)=5.2, 10.3, 15.5 m
29 2
Fig.6 MOUNTING EXAMPLES
AH-2b+longwire
AH-2b
antennaelement kit (op-
tional)
Long wire
Long wire
Produktspezifikationen
| Marke: | Icom |
| Kategorie: | Radio |
| Modell: | AH-4 |
| Breite: | 172 mm |
| Tiefe: | 230 mm |
| Gewicht: | 1200 g |
| Produktfarbe: | Grau |
| Impedanz: | 50 Ohm |
| Höhe: | 69.5 mm |
| Betriebstemperatur: | -10 - 60 °C |
| Anzahl: | 1 |
| Frequenzbereich: | 3.5 - 54 MHz |
| Markenkompatibilität: | ICOM |
| Bemessungsleistung: | 120 W |
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