Yaesu FT-902DM - GENERAL DESCRIPTION; Transceiver Overview; Frequency Coverage and Modes; Advanced Features and Construction

ALL MODE HF TRANSCEIVER
FT-902DM
el
—_—
~~
SSS
SSS
Ss
[SESS
:
SSA
=
4a
GENERAL DESCRIPTION
The FY-902DM is a precision engineered, high per-
formance HF transceiver of advanced design, pro-
viding all band coverage (160, 80.40, 30. 20, 17,
15, |2,and |]Ometers) on all modes of operation:
LSB, USB, CW, FSK, AM, and FM. This trans-
ceiver operates alan input power of 180 watts
on SSB/CW and 80 watts on AM, FM, and FSK.
Advanced features include PLL (Phase Locked
Loop) frequency derivation, digital plus. analog
frequency readout with large displuy LED digits,
a built-in Curtis 8044 IC electronic keyer, and
memory frequency control circuilry. Staite-of-the-
art receiver performance features Include rejection
tuning,
dualfilter
variable
IF
bandwidth
tuning,
and,
for
CW,
audio
peak
frequency
(APF)
tuning
for
unsurpassed
rejection
of
unwanted
signals.
Other
built-in
features
include
VOX,
semi-break-
in
CW
with
sidetone,
25
kHz
calibrator,
advanced
noise
blanker,
RF
speech
processor.
and
a
20
dB
RE
attenuator
for
protection
against
receiver
overload,
All
circuits,
except
the
transmilter
driver
and
final
amplifier
stages,
are
solid
state,
utilizing
modern
plug-in
printed
circuit
boards,
thus
per-
mitting
easy
maintenance.
The FT-902DM transceiver is entirely self-con-
lained, requiring only an antenna and power source
for operation. For base station operation, AC
power voltages of LOO/110/117/200/220/234 VAC
may be chosen, though the unit normally is sup-
plied with 117 volt capability. A DC-DC converter
unil provides fer mobile or portable operation.
Selection of AC or DC power source is automati-
cally made when the proper line cord is inserted.
For mobile operation a separate switch is provided
on the front panel to turn olf the tube heaters
while in the receive mode. With the heaters off,
current consumption is only 1.1 amp.
Among the available options on economy models
FT-902D/SD/DE are the memory unit, the keyer
unit, the DC-DC converter, the FM unil, and the
cooling fan. Optional equipment on all modets are
the 600 [lz CW filter and the 6 KHz AM filter.
The entire PT-902DM transceiver weighs approxi-
mately 18 kg., and is 342 mm wide, 154 mm high,
and 324 mm deep. A diecast front panel and
heavy-duty case provide maximum protection
against damage from shock and vibration during
travel use.