Base Station Installation; Mobile Installation - Yaesu FT-902DM Instruction Manual

This transceiver is d esigned to b e a single-unit
station fo r fixed , p ortable , or mobile opera t ion.
Consequen t ly , power supply connections provid­
�
ing fo o peration from a variet y of source voltages
are available . This sy stem p rovid es the flexiblity
required for ch a nging locations or quick moves
from fi x e d to mobile operation.
BASE STATION IN STALLATION
The FT-902DM is designed for use in many areas
of the world using supply voltages that may differ
from the operator's local supply voltage. For this
reason be sure that the voltage marked on the
'
rear of the transceiver agree s with the local AC
supply , v oltage. THIS I N SPECTION MUST BE
MADE BEFORE CONNECTING THE AC POW­
ER CORD TO THE POWE R O UTLET.
�
C UTION
P
ERMANENT DAMAGE WI LL RESU LT IF IM­
PROPE R AC SUPPLY VOLT AGE I S APPLI ED
-
TO THE T R ANSCEIVER .
The tran sceiver should b e connected t o a good
earth groun d . The ground lead should be made
w ith a h e avy braid wire and should be connected
to the GND terminal on t h e rear apron of the
transceiver.
W e do not recomme nd the use o f power con­
nectors o ther than the ones supplie d by Yaesu . If
a rig brough t in for servicing is blow i ng fuses every
t i me y o u plug it in, check to make sure that no
" i m p rov e me nts " h ave been m ade t o the power
cord through substitution o f or m o d i fi catio n to
the power connector.
For base station installation , the only importan t
c o nsideration t h at n ee d b e m a d e i s t o ensure
adequate circulation around the unit . Do n o t place
b ooks or p apers on or around the cabine t , nor
should t h e unit be p laced on top of another
heat-generating d evice such as a linear ampli fier.
Avoid h e at ducts and win d o w lo cations which are
ex posed to the hot sun , a µ d you will keep your
transceiver running at full speed for a long, long
time .
Be certain to ground the transceiver through a
heavy , b raid ed cable less than 1 0 fe et long. Cold
water pipes in newer houses probably are unsatis­
factory a s grounding p osts ; i t i s much better
INSTALLATION
practice to use a system o f one or more ground
rods , wit h the ground line securely b ond e d to the
groun d system.

MOBILE INSTALLATION

(Note : The DC-DC converter d escribed herein is
built - in on the FT-90 2 DM , and is an available
o p ti o n on the FT-902D
The FT-902DM will operate satisfactorily from
any 1 3 . 5 Volt DC negative-ground b attery s o urce
by connecting the DC p ower c ord to the rear
p anel recep tacle.
special m obile m ounting b racke t is available from
y our d ealer. In m obile installations t h e tra n s­
ceiver should be suited away from heater ducts.
N o special precautions need b e observed if ade­
quate ventilation spaces is available. A m inimum
o f two inches of air space above the cabinet top
an d on all sides is recomm ended to allo w proper
air flow around the cabinet . Never stack o ther
units above or below the transceiver since the
accumulated heat f r om b oth units could cause
damage .
The transceiver requires an average o f 1 4 amps
on transmit , wi th 20 amps o n voice p e ak s . The
DC power cable comes equipped W i th a 2 0 amp
fuse . When making conn ections to the car battery ,
b e absolu tely certain that t h e RED lead i s con­
nected to the positive ( + ) terminal and the BLACK
l e ad i s c onnected to the negative ( - ) terminal .
Reversed connectio n s c ould p e rm an en tly damage
the transceiver.
t 17 v
11.0V
IOOV
0
11 7 V
110 v
IOOV
0
- 1 1-
/ /
SD D E m o de l s )
For under-dash mounting, a
11 7 V
1 l7V
11 OV
llOV
IOO V IOC'V
0