Kenwood TR-7730 User manual

2m FM TRANSCEIVER

INTRODUCTION
‘You
are
the
owner
of
our
latest
product,
the
new
TR-7730
transceiver.
Pi
1g
Your
transceiver
in
service.
The
unit
has
been
carefully
engineered
and
manufactured
carefully before pla
fe read this instruction manual
to
rigid
quality
standards,
and
should
give
you
satisfactory
and
dependable
operation
for
many
years.
AFTER UNPACKING
‘© Shipping container:
Save
the
boxes
and
packing
in
the
event
your
unit
needs
to
be
transported
for
remote
operation,
maintenance, or service.
© The following explicit definitions apply in this manual:
ACCESSORIES
svsseeee 3 Caretully unpack your TR-7730 and check that it is sup-
plied with the following accessories:
Note: If disregarded, inconvenience only, no risk of equipment damage or personal injury:
Caution: Equipment damage may occur, but not personal injury.
CONTENTS
FEATURES ......
BEFORE
U!
3
SPECIFICATIONS ..
SECTION 1, PREPARATION FOR USE
1.1 Installation.
SECTION 2, CONTROLS AND TERMINALS.
2.1 Front panel
2.2 Rear panel .
SECTION 3, OPERATION ..
3.1 Transmitter precautions...
3.2 Frequency selection ses
3.3 Priority of controls,
3.4 Memory switch
3.5 Scan operation.
3.6 TX Offset switch ..
3.7 Squelct
3.8 HI/LOW switch,
3.9 Autopatch operation.
3.10 TONE switch..
3.11 Bail and Foot installation.
3.12 Adjustments .
SECTION 4. ADDITIONAL INFORMATION.
SECTION 5. OPTIONAL ACCESSORIES.
SCHEMATIC DIAGRAMS ..
BLOCK DIAGRAMS......
1 Dynamic microphone (with U/D switch)
(T90-0313-05).....
2 Mounting bracket (A13-0618-22).......
Mounting boss (J32-0748-04) .
Machine
screw
(3¢
x
6)
Machine screw (36 12) ..
Pan head screw (6¢ x 8)
Fiat washer (66)
Spring washer (69).
Flange nut (66)
(For installation, see page 6 and 13)
3 Leg
Front bail (J02-0420-04).. esssees] piece
Bail mounting hardware (J21-2676-04) ...
Rear foot (J02-0022-05).
4 DC power cord (E30-1 689-05)
5 Fuse (6A) (FO5-6021-05)
6 Miniature plug (for external speaker)
{€12-0001-08)... eesseeeseeeeeT POCO

FEATURES
een
2. Rotary encoder, 5 kHz or 10 kHz-step digital VFO system specifically designed for mobile operation.
3. High /_ RE amplifier using a iow noise dual gate MOS FET.
4, PLL circuit for direct VCO (Voltage Controlled Oscillator) output at 144 MHz assures excellent spurious characteristic.
5.
6.
BUSY and MEMORY scan functions stop scan operation when a signal is present.
Five memory channels. Two different frequencies (transmit and receive) are stored in CHS, permitting “‘odd-split””
repeater operation.
7. Hand microphone with UP-DOWN switch.
8. TX OFFSET Switch shifts frequencies +600 kHz for standard repeater operation.
9. RF POWER HI(25 W) — LOW (5 W) select switch.
10, Red LEO frequency display.
11, S and RF METER LED bar indicator.
12, External BACK UP terminal.
13. Extended frequency coverage (143.900~ 148.995 MHz) in switchable 5 kHz or 10 kHz steps, allowing simplex and
repeater operation on many MARS frequencies.
BEFORE USE
‘These are factory adjustments.
cool
this unit
BEFORE
transmitting.
Keep equipment away from heat and out of direct sunlight.

SPECIFICATIONS
Semiconductors
15
Transistors
46.
FETs
7
Diodes
a1
144,000
to
147.995
MHz
Digital
control,
phase
locked
VCO
Frequency range.
Frequency
synthesizer
Mode
Antenna
impedance
Power
requirement...
Grounding
Negative
Operating
temperature......
~20°C
to
+60°C
Current
drain
....sse
.0.4A
in
receive
mode
with
no
input
signal
5.5A
in
HI
transmit
mode
(Approx.)
3A
in
LOW
transmit
mode
(Approx.)
Less
than
2.5
mA
for
memory
back
up
(from
power
supply)
47.5
mm
(5-3/4")
wide
51.5 mm (2°) high
198.0
mm
(7-3/4")
deep
(projections excluded)
1.5 kg (3.3 Ibs) (Approx.)
Dimensions.
Weight...
(Transmitter
Section}
RF
output
power
(at
13.8
VDC,
50
Pod)...
ssesslll
25
Watts
min.
LOW
5
Warts
approx.
(Adjustable!
-+».Variable
reactance
direct
shift
1s than + 20x 10
Modulation...
Frequency
tolerance...
{~10°C~
+502¢)
Spurious
radiation
-HI Less then ~ 60 48
LOW
Less than
~53
48
5 kHz
Dynamic
microphone
with
PTT,
up,
down,
switche:
Maximum
frequency
deviation
(FM)
Microphone
5009
--.Double
conversion
superheterodyne
1st
IF
10.7
MHz
2nd IF 455 kHz
Better than 0.5 nV for 30 48 S/N
Better
than
0.25
zV
for
12
dB
SINAD
.sMore
than
12
kHz
(—6
dB)
Less than 25 kHz (—60 d8)
Better than 60 dB
0.16 pV (threshold)
‘More
than
2.0
watts
across
8
ohm
load
(10%
dist.)
Intermediate frequency ..
Receiver
sensitivity
Receiver selectivity ...
Spurious
response.
‘Squelch
sensitivity
Audio
output...
Note:
Circuit
and
ratings
are
subject
to
change
without
notice
due
to
developments
in
technology.

SECTION
1.
PREPARATION
FOR USE
1.1
INSTALLATION
1.1.1, Interconnection
Connect
the
antenna
and
power
supply
as
shown
in
Fig.
1-1
for
fixed
station
or
mobile
operation.
1.1.2. MOBILE installation
©
Installation
location
Using
the
supplied
mounting
bracket,
install
the
transceiver
under
the
dashboard
or
on
the
side
of
the
console
in
your
car.
Refer
to
Fig.
1-2.
Care
should
be
taken
to
allow
free
circulation
of
air
around
the
heat
sink
of
the
rear
panel.
If
your
car
is
equipped
with
an
electronic
fuel
injector,
the
transceiver
should
be
as
far
from
the
control
equip-
‘ment
as
possible.
© Antenna installation
Various types of antennas for 2 meters mobile operation
are available,
NOTE:
For gutter-mount installation, the antenna bracket must
be grounded to the car body as shown in Fig. 1-2. Affix
the antenna securely, referring to the antenna instruc-
tion.
‘©
Power
supply
Connect
the
supplied
power
cord
with
fuse
directly
to
the
battery
terminals.
Connecting
to
the
cigarette
lighter
socket
can
cause
a
poor
connection,
and
excessive
voltage
drop.
© Back up power for micro-processor
With power supplied from battery, the micro-processor
keeps operating even when the power switch is OFF. In
this case, current drain is very low, approximately 2mA.
‘The car can be parked overnight with little battery
power consumed.
However, when the car is to be parked for a long period
‘of time (more than 1 month), it is advisable to discon-
ect the power plug. in this case, the back up function is,
disabled.
1f power is diconnected, the back-up fonction is retained
for only 1 — 1.5 sec. If instantaneous voltage drop at
engine-starting continues for more than 2 sec, the micro
processor will be reset and the memory cleared.
© Ignition noise
The transceiver is designed to suppress ignition noise;
‘excessive noise is present, it may be
to use suppressor spark plugs (with
NOTE: When first connecting the power cable (with the power switch off the microprocessor may not bein standby mode. Backup current
‘may be 2-3 times greater than normal, and the diaplay decimal may flicker. Turn on the power to reset the microprocessor.
iam)

1.1.3. FIXED STATION installation
©
Power
supply
‘The KPS-7 power supply is available as an optional
accessory and perfectly matches the design of your
transceiver.
B, INSTALLATION of
mounting bracket
nce
va
at
poe
nen
Side
of
Bou
console
RboArd.
Secure
the
mounting
Dracket
with
screws
and
nue
8 through the Boor Mtg
‘The
wanacewar
shoula
be
away
‘The
cable
can
be
inserted:
‘wom your knees
(Antenna TnataTaon) ©—Guer-movotea
wie antenna
‘Ananna oracket
B
amove hepa to mere
‘rounding tothe ca boar
Fig.
1-2
Installation
for
Mobile
Operation
*
Connect
Direct
10
te
barter
termina

@ricnns ts. 1-31
Various types of fixed station antennas are commercial-
ly available. Select your antenna according to your in-
stallation
space
and
application
(DX,
local
ASO,
etc.)
‘Note that the SWR of your antenna should be less than
1.5, A high SWR will cause the TR-7730 protective cir-
cuit to operate, reducing the transmit output power.
‘The TR-7730 is factory adjusted to deliver the rated RF
output (25 W) at about 146 MHz, where the RF meter
indicates '“6" on the 10-division scale. The RF meter
will indicate about this point when the antenna SWR is
less than 1.5.
Back-up
Power
for
Micro-Processor
(memory
hold)
1, With power supplied directly from the KPS-7, the micro
Processor continues operating even when the power
switch is OFF.
Current drain is very low, approximately 2mA.
. Hf you wish to retain the memories even when the KPS-7
is off, connect the (optional) TK-1 (W09-0008-05) to
‘the external back-up terminal.
. In usual VFO operation, the kHz digit can not be backed-
up. However, this doesn’t mean @ mulfunction. For in-
stance, when the TR-7730 power switch is turned on
after tumed off at the operating frequency of
146.255 MHz, the operating frequency becomes
146.250 MHz.
‘Standard voltage: 13.8V DC
2.
Connection
ot
Current
capacity:
More
than
8A
‘another OC source. Nore
Preteraby. voltage should be
‘scjustable between 12V and
tevoc
‘The regulated supply should
be
eawed
witha
built-in
protection exeuit for both
overcurrent
ana
overvltage
cAUTiON:
‘Yao! antenna (stacked)
Control cable
lomm-dectonall and Yagi antenna
(urwdirecnonai) The Yag' antenna
Fig.
1-3
Installation
for
Fixed
Station
Operation
a
Battery cherger cannot be used,

[SECTION
2.
CONTROLS
AND
TERMINALS
j=
@KENWOOD
4m
FM
TRANSCEIVER
}
a
‘
1, MEMORY selector
This
switch
is
used
to
select
memory
channels
“
through
‘"5"*.
The
operating
frequency
can
be
stored
in
or
called
back from
the
channel
selected
by
this
switch.
In
channel
“'5',
two
different
frequencies
(transmit
and
receive)
can
be
stored
for
“odd-split"”
reps
2. M switch
This
is
used
to
input
desired
frequencies
to
each
channel
for
memory.
By
pressing
(am)
the
switch,
the
frequency
indicated on the display is stored in the selected channel,
3. MR switch
This
is
used
to
recall
memory
frequencies
from
each
channel.
4. Frequency display
LEDs
display
the
operating
frequency
in
4
digits
(MHz — 1 kHz)
5. BUSY indicator
This
lamp
will
light
when
the
squelch
is
open
in
receive
mode.
6. ON AIR indicator
A
light
emitting
diode
(L.E.0.)
will
fight
in
the
wansmit
mode.
8
’
oe
7. RPT indicator
When the TX OFFSET switch is set to + or ~ position, this
indicator lights.
8. S/RF-meter
This meter indicat
transmit output (RF).
receive input signal strength (S) or
9. TX OFFSET switch
Shifts the transmit frequency for repeater operation
—: Switches the wansmit frequency down 600 kHz
from
the
receive
frequency.
S: Simplex (receive and transmit frequencies are the
same.)
+: Switches the transmit frequency up 600 kHz from
the
receive
frequency,
10. M.S (MEMORY SCAN) switch
Press this switch and the memory channels 1 ~ 5 are scan-
‘ned. The scan operation stops at a channel where signal is
present. This switch should be used in conjunction with the
SQUELCH control (see page 11)
11. MIC connector (6-pin)
For connection of the supplied microphone.

12.
TONE
switch
The
switch
is
for
control
of
a
user
supplied
tol
generator
{not
available
from
TRIO-KENWOOD
13.
HOLD
switch
st
Pressing
this
switch
‘memory
scan.
The
microphone
PTT
switch
is
also
used
to
stop
memory
scan.
14,
HILOW
switch
This
switch
is
used
to
set
transmit
output
power
to
either
26
W
(high)
or
5
W
(low).
.
15.
SCAN
switch
.
Os
this
switch,
scan
operation
starts
ot
the
rate
fected
by
the
STEP
switch,
or
the
same
ap
wixtn
youuse
the
main
dial.
When
a
signal
is
pregent,
sedafifigistops
and
the
BUSY
indicator
lights.
ee
The
SCAN
switch should
be
uss
Kenpanbarrwith
the
SQUELCH
CONTROL
and
MEMORY.
SCAN
ewifeh(pee
page
11).
i=
16. STEP switch
Use
this
switch
to
select
the
step
(JM:
5
kHz,
am:
10
kHz)
during
frequency
scan
or
microphone
UP/DOWN
e
Bt
fee
The
squelch
control
is
used
to
eliminate
noise
during
no-
signal
time.
Normally,
this
control
is
adjusted
clockwise
un
Ul
the
noise
disappears
and the
BUSY
indicstor
goes
off
(threshold
level),
19. POWER/VOL
Power
ON-OFF
switch
and
volume
control
are
combined.
Turning
the
control
fully
counterclockwise
will
turn
the
power OFF. Clockwise rotation will increase the volume, In
‘the
power
OFF
position,
about
2mA
current
is
drawn
to
back-up
the
micro-processor,
provided
the
power
cable
is
cdnnectee
x0
@
vormment
power
source.
To
eompotely
Jitele
the
transceiver,
disconnect
the
power
cable.

10
20. ANT terminal
Connect 509 for 2 m,
21. EXT. SP terminal
External speaker terminal. Connect a 8 ohm spt
the supplied plug.
22. DC power cord
Connect the supplied power cord. Input voltage is 13.8V
DC. Observe correct plus (+: Red) and minus (—: Black)
polarity.
23. Back up power terminal
This connector is used for back-up in fixed station opera-
tion. The micro-processor retains the VFO frequency
memory function even when the power switch is turned
OFF, when back-up power is supplied. Use optional TK-1
(W09-0008-05)
24, PTT switch
Press-to-talk switch used for transmission. This will also
release scan operation.
25. DWN switch
This switch is used to step down the digital VFO frequen-
cy.
26. UP switch
This switch is used to step up the digital VFO frequency.
When the DWN or UP switch is depressed continuously
frequency
shifts
rapidly.