Table of Contents
Advertisement
Es -cUU YAEL EE SCH AEEEL CLL
1.1
KENWOOD
TS-900
The
TS-900
is a highly sophisticated
solid state amateur
radio transceiver employing only three vacuum
tubes.
Operating on all amateur bands between 3.5 and 30 MHz,
this unit is constructed
modularly.
All major electronic
circuits
are wired
on
easily removed
or installed
circuit
board.
The TS-900 includes many
built-in features usually
found
as extras on
other transceivers.
Included
in the
equipment are a VOX
circuit,
a 100 KHz
and a 25 KHz
crystal
calibrator,
an
RIT circuit,
and
an effective noise
blanker.
The TS-900 also includes automatic gain control
(AGC), automatic
level control
(ALC), and provisions for
break-in CW with sidetone.
Designed for operation on SSB, CW, and FSK, the TS-900
delivers more than 150 watts PEP output.
The low power
consumption
of the TS-900, resulting from its solid state
design, makes the transceiver ideal for portable and mobile
operation.
Any complicated electronic equipment will be
damaged
if operated incorrectly, and this transceiver is no
exception.
Please
read
all of the operating
instructions
before putting the TS-900 on the air.
1.2
REQUIREMENTS
FOR OPERATION
AC OPERATION
The TS-900 requires an external power supply for operation.
For fixed station operation, the PS-900 AC power supply
operates from any 120/240 VAC, 50/60 Hz power source
TABLE
1. Operating Voltages and Current
Required by the TS-900
Pin Number
Requirements
—100 VDC at 8 ma.
AC switch control
120 VAC at 120 ma.
120 VAC at 120 ma.
13.8 VDC at 510 ma.
13.5 VAC at 3 amps.
125 VDC at 40 ma.
13.5 VAC
at 3 amps.
grounded
| 280 VDC at 70 ma.
800 VDC at 340 ma.
—17 VDC at 20 ma.
SECTION
1. INTRODUCTION
ocAHdE sco ocetE} scent
CUE cUHHnoetEEcUHHESSCEELD At
Sr ee
HDD
seEHED saa
capable of supplying 410 watts or more.
This power supply
has a built-in
8 ohm speaker.
If a different power supply,
other than the PS-900 or DS-900, is used it must be capable
of supplying the voltage requirements described in Table 1
at the POWER
SUPPLY connector.
DC OPERATION
The
DS-900,
designed
for mobile
operation,
delivers the
above
voltages from
a 12 VDC
power source.
This DC
power supply does not have an internal speaker, therefore
an external 8 ohm speaker is required.
ANTENNA
Fixed
Station
—
Any
of the common
antenna
systems
designed for use on the high frequency amateur bands may
be used with the TS-900, provided the input impedance of
the transmission
line is not outside the capability of the
pi-output matching network.
The transmission line should
be of the coaxial cable type.
An antenna system which
shows
a standing wave ratio of less than 2:1 when using
50 or 75 ohm
coaxial
transmission
line, or a system that
results in a transmission line input impedance that is essen-
tially resistive, and
between
15 and 200 ohms will take
power from the transceiver with little difficulty.
If open-
wire or balanced
type transmission
line is used with the
antenna, a suitable antenna tuner is recommended between
the transceiver and the feed line.
Methods of construction
and
operating
such tuners are described
in detail
in
the
ARRL
Antenna
Handbook,
and similar publications.
For
operation on the
75 and 40 meter bands, a simple dipole
antenna, cut
to resonance
in the most used portion of the
band,
will perform
satisfactorily.
For operation
of the
transceiver
on
the 10, 15, and 20 meter
bands, the effi-
ciency
of the station will be greatly increased
if a good
directional
rotary antenna is used.
Remember that even
the most powerful transceiver is useless without a proper
antenna.
Mobile Station — Mobile antenna installations are critical,
since any
mobile
antenna
for use on the high frequency
bands represents a number of compromises.
Many amateurs
lose
the
efficiency
of their
antenna
through
improper
tuning.
Remember
the following points when using the
TS-900 with a mobile antenna.
The "Q" of the antenna
loading coil should
be as high
as possible.
There are several commercial models available
which use high ''Q" coils.
The loading coil must be capable of handling the power of
the transceiver without overheating.
In the CW mode the
power
output of the transceiver will exceed
100 watts.
Advertisement
Table of Contents
