Antenna Considerations - Yaesu FT-530 Manual

To open the FBA-12 battery case, place your
thumbs on the tracks on top of the case and gently
pry the tracks apart. Always replace all six batter-
ies, paying attention to the polarity indicated in-
side the case.
)( Do
not attempt to open any of the rechargeable
Ni-Cd packs, and do not install rechargeable cells
in the FBA-12, as they could explode if acciden-
tally short-circuited.
To replace the battery case or Ni-Cd pack, re-
peat the second and third steps above, simply slid-
ing the battery case in the other direction after
aligning the rails of the battery case with the tracks
below the Battery Release Button.
A1El-12A2B,NUi-18A2B
A1El-29A2B Speaker/A1icrophones
A Speaker/Mic can increase operating conven-
ience and extend communications range. The ex-
ternal loudspeaker can be used with the internal
speaker to monitor both channels during dual re-
ceive operation. Each speaker/ mic has a dual plug
connector which mates with the
EAR
and
MIC
jacks on the transceiver, disabling the internal mi-
crophone. The cable allows the transceiver to be
left clipped to your belt, or to be held above ob-
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Operating & Charging with an External DC Supply
The E-DC-5A or another cable with a 3.5-mm coaxial plug that matches the
EXT DC
Jack can be used
to operate the transceiver from a source capable of providing 1.5 amperes at 5.5 to 16 VDC.
To charge a battery through this jack, the supply voltage must be at least 2 volts higher than the
nominal battery voltage (9.2 volts for the FNB-25, -26 and -28, or 14 volts for the FNB-27). Charging
time depends on the battery capacity and state of charge, and is typically 18 hours for the FNB-25/-27,
21 hours for the FNB-28, and 30 hours for the FNB-26, when fully discharged. Be careful to avoid
overcharging a battery pack when using an external DC supply: when a battery is fully charged,
disconnect it and install a BC-l bottom cover on the transceiver to protect it.
14
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structions for better performance. Also, using a
speaker/ mic for mobile operation allows the tran-
sceiver to be left in the MMB-49 Mobile Hanger.
Hold the speaker/mic close to your ear during
reception; or connect an earphone to the plug on
the speaker/mic, attenuating the audio from its
loudspeaker. To transmit just hold the speaker/_
mic about 4 cm (2 inches) from your mouth and
close the
PTT
switch on the microphone.
MH-19A2B Earpiece/A1icrophone
The MH-19A2B works like the speaker/ mics de-
scribed above, but consists of an earpiece and
inline microphone/PTT switch element. The ear-
ph~ne
is inconspicuous and ideal for monitoring in
nOISY or crowded areas, while the microphone has
a clip for attaching to a shirt or jacket collar. Press
the
PTT
switch on the microphone to transmit.
MH-29A2B Remote Control Speaker/A1i-
crophone
The MH-29A2B enables radio functions such as
VFO/Memory selection and tuning to be remote
controlled and viewed on a backlit LCD. Some
first-level functions can also be be selected.
YH-2 VOX Headset
with Boom A1icrophone
The YH-2 connects to the
EAR
and
MIC
jacks in
the same manner as the speaker/mies. It consists of
a headband-supported earphone and attached
boom microphone, allowing hands-free operation
when .v0~ (v~ice-actuated transmit switching)
operatIon IS actlvated in the transceiver.
Antenna Considerations
While the supplied YHA-29 rubber flex antenna
is convenient for short-range operation, the stand-
ard BNC jack allows use of a higher gain antennato
extend range in base or mobile operation. Any
antenna used with the FT-530 should have an im-
pedance close to 50 ohms in the 2-meter and 70-cm
~ands. If
a feedline is used, it should be good qual-
Ity 50-0 coax. Obtaining a proper fit with some
BNC plugs may require removing the rubber gas-
ket around the antenna jack on the transceiver.
15