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This
phone jack provides
can- ]
1
1
stant-hvel kceiver audio out-
Rear Panel
Thiç phono jack acceptç efiernal
ALC
(Automafic
Level
Confrol)
voltage
from a
!
linsar amplifier, to prevent owr.excka-
This
red ?nono
jack
tion. ALC voltage rangs is
O
-
4
VDC.
(pin positive) at up
hg
an
external accessory.
-
CAUTION! The
iine
1s not
fwed,
so
be careful not tu
revew
polarhy
or
draw
more
chan
200 mA,
as serious
damage can
resufil
Note:
The only required
cannec-
tions
f3r
operating ths transceier
are DC power (belcw) and an
an-
tenna. Also,
a
proper ground is
highly recommended, and may
be
necessary
for proper
operation.
All
other rear panel connections ara
optional.
l
Use
this
confrol to
!
adjust speech proc-
as described
o n
page 19.
'
i
essor
compression
!
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1
This 2-contact mini phone
1
!
jack
provides recsiver audio
for an exferrial loudspeaker,
i
such as the one provided in
the FP-800. or
the SP-6.
In-
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serting a plug in this jack dis-
1
a b l e s i h e i n t e r n a i
,
loudspeaker. lmpedance is 4
i
,/
, /
/
1
Conriect
the
5 0 4 cc~axial
I
Connect your CW
key.
keyer paddles
'
!
i
1
feedline
I o
yaur
antenna or
1
sKternal AT0 hore using
a
!
_----
type M
(UHF,
PL-259) plug.
y * - -
Do
not
operate
the Pans-
ceiver withou t
an
antenna
or
durnrny
loadi
o r
external keyer
to this
ka-inch
2-con-
tact jack.
Wiring is
on
page 20. Open
circuit voltage is +5 V
DC,
and cloçed
Connect this terminal t o a
I
good earth ground.
for safsty
8
and
optimu r n performance.
i
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This is the 13.5-voi! DC power
\ ,
mnnactor. Connect
a
2 0 4
1
circuit curreni
is
0.7
mA.
tacts). Opencircuit
voltage
is
13.5
V,
proper
)
.
and closed circuit current
is 15
mA.
I
L
I ) !
This yellow phono
control
input jack
1
Thiç grill
is
the air outlet for the
1
to
8
Q.
/ '
\ ,
çupply
as
shown k l o w . See
1
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, '
\
L a s a the Caution on page 7.
' '
/
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8
cc---
\
can be uçed to
activate the transmit-
ter remotely
(by shorting
the con-
U s
ihis con!rol to ad-
just CW side
tone level
heard during
CW
np-
,
eration,
as denribsd
an page 20.
cooting
system.
Make sure nothing
blocks this grill in your installation,
as air
rnust be
free
to
exit here
fur
This 6-pin mini DIN inputloutput jack
allows external cornputer control of
the
FT-840.
Signals levelç are l T L ( 0
and 5 V
DC).
Pinout is on page 1 0,
and
the signalliiig protocol and data
formats are a'escnbed in
Ihe CAT
This s p i n mini DIN
jack
is for the FC-BO0 Exter-
na1 Automatic Antenna
Tuner.
Pinout diagram
is
on pags
10.
I
This 8-pin mini DlN
jack
is
for the
FC-IO
External
Automatic
A n l e n n a
Tuner. Pinout diagram is
on page 10.
chapter. starting on page 35.
1
Thiç 8-pin
jack
outputs control
signals for the
FL-7000
Linear
o r FC-1000 ATU, including
band selection data
t o se(
the
Linear
or Tuner
to the same
band
as the
FT-840.
Pinout is
on page
10, and QSK connec-
tions on page 11.
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