is the smallest transceiver in the world providing such
wide frequency coverage. Providing transceiver coverage
of the HF, 50 MHz, 144 MHz, and 430 MHz amateur bands on
SSB, CW, AM, FM, AFSK Teletype, and Packet, the FT-100
also includes receive coverage of
I00KHz through 970 MHz, so you can monitor public safety,
weather broadcast, AM and FM broadcast, and TV audio
transmissions, in addition to all the action on the ham
bands. All this from a rugged compact case measuring
just 160 (W) x 54 (H) x 205 (D) mm (6.3" x
2.2" x 8.0")!
the acclaimed performance of the FT-1000D, FT-1000MP,
and FT-847, Yaesu's engineers have crafted the FT-100's
front end for a very low noise floor and wide dynamic
range. Utilising an up-conversion architecture for HF
with a 68.985 MHz first IF, the FT-100 features a
double-conversion superheterodyne system (triple-conversion
on FM) with the 2nd IF at 11.705 MHz. The first mixer is
a low-noise, high-intercept design using SST310 JFETs in
a doubly-balanced configuration. On 144/430 MHz, the
very- low-noise GaAs MES FET SGM2016 preamplifier is
followed by an HSB88 diode-ring mixer, yielding the
excellent Noise Figure required for weak-signal work.
The front-end devices are individually selected and
matched, ensuring a high level of performance
consistency as units are manufactured.
|To ensure the
dual goals of low receiver noise floor and wide dynamic
range, Yaesu's engineers utilise an AD9850 Direct
Digital Synthesiser (DDS) for the main local oscillator
of the FT-100. Providing fast locktime and excellent
Carrier-to-Noise (C/N) ratio, the DDS also yields tuning
steps as small as 1.25 Hz, for silky-smooth action
indistinguishable from an analogue VFO system. The PLL
circuits in the FT-100 feature a low-noise custom J-FET
device (FQ7925), thus enhancing system performance.
FEATURES FOR ACTIVE DXERS
|* IF Shift :
Use the IF SHIFT feature to vary the center frequency of
the IF passband, so as to eliminate interference above
or below the current operating frequency.
* IF Noise Blanker : Optimised for use in the mobile
environment, the FT-100 includes an effective IF Noise
Blanker specially designed for suppression of ignition
and other pulse-type noises. The Noise Blanker's
threshold is adjustable via the MENU system.
* Intercept Point Optimisation (IPO): For reception on
the lower frequencies, where very low Noise Figure is
not required, the IPO feature causes the RF preamplifier
to be bypassed, allowing direct signal input to the
first mixer. An input attenuator is also available, for
reception under extremely noisy conditions.
* Adjustable AGC : The
Automatic Gain Control (AGC) circuitry of the FT-100's
receiver may be adjusted, via the MENU, for SLOW or FAST
receiver recovery times. A convenient "AUTO"
setting programs "FAST" AGC for CW, and "SLOW"
for voice modes.
* Clarifier (RIT) : For split-frequency pile-ups or to
follow drifting signals, the Clarifier control provides
upto ±9.99 kHz of adjustment of the receiver's
frequency, without changing the transmitter frequency.
For wider-split pile-ups, the "SPLIT" mode
allows you to use VFO-A and VFO-B separately, too.
* RF Gain Control : For noise reduction and/or variation
of the AGC system threshold, the MENU allows the front
panel's Squelch control to be switched to operate as an
"RF Gain" control.
* VOX : For hands-free voice operation, the VOX system
includes MENU adjustments for both VOX Gain and Delay. A
separate setting is also provided for receiver recovery
in the CW mode.
SCROLLING FRONT PANEL
|The A, B, C,
and D keys below the display provide access to many
control functions for the FT-100, including VFO
selection, Memory Channel loading, Repeater Shifts and
provides 6 Memory Groups of 50 Channels each, for a
total of 300 "Regular" memories. In addition,
you get 20 "Split Frequency" memories, 5 Quick
Memory Bank (QMB) memories, 4 "Home" Channel
memories, and 20 Band-Limit memories, for a grand total
of 349 Memory Channels! Use the QMB or Home channels for
Quick QSY to a favourite frequency, and use the Split
memories for DX-pedition pileups or 7MHz SSB work.
RESOLUTION DOT-MATRIX DISPLAY
|The large (70
mm x 30 mm) blue LCD dot-matrix display provides
easy-to-read indication of many operating functions,
including frequency, RX and TX metering, operating
functions, status icons, and the Spectrum Scope
bar-graph. And to set the illumination level precisely
to the brightness you want, the MENU provides a
"Dimmer" feature with 64 degrees of
REMOTE MOUNTING KIT
operation where mounting space is very limited, the
optional YSK-100 Separation Kit allows the front panel
to be remotely mounted on your dashboard, with the
transceiver stashed away in available space. Data is
transferred between units at a lightning-fast rate of
62,500 bps, for seamless remote operation.
SO MUCH MORE...
|* Two Antenna
Jacks (HF/50 MHz, 144/430 MHz) using Type M (UHF)
* Three Programmable
Microphone Keys (ACC, P1, and P2) for easy feature
* Easy Linear Amplifier
* AF Speech Processor
* Automatic Power-Off
(APO) feature turns radio off after 1/2/3 hours to limit
* Time-Out Timer (TOT)
limits "stuck mic" interference potential
* Dual VFOs for quick QSY
* Peak-Hold metering of
Signal Strength, Power Output, and relative SWR/ALC
* Easy-to-use MENU system
for custom "Set and Forget" configurations.
HIGH-OUTPUT TRANSMITTER DESIGN
power amplifier section utilises MOSFET devices,
providing low noise, low distortion, and high
reliability. The HF/50 MHz amplifier provides 100 Watts
of output, while the VHF/UHF section generates 50 Watts
of power on 144 MHz, and 20 Watts on 430 MHz.
Reliability is assured thanks to the extensive cooling
system, featuring twin cooling fans and an aluminium
TRANSCEIVER PERFORMANCE THROUGH DIGITAL SIGNAL
interference rejection and transmitter "talk
power," the FT-100's DSP circuitry enhances both
sides of the communications circuit. The FT-100 DSP Unit
features a 24-bit high-tech D/A chip for signal
* Digital Dual Bandpass Filter : Providing "brick
wall" audio selectivity for voice modes, the
Bandpass filter allows independent High-Pass and
Low-Pass Filter adjustments, with cut-off frequencies of
100 Hz - 1000 Hz (HPF) and 1000 Hz - 6000 Hz (LPF). On
CW, the Bandpass filter becomes an Audio Peaking Filter
with available bandwidths of 60/120/240 Hz.
* Noise Reduction Filter: BuiIding on the
highly-successful Noise Reduction feature of the FT-920,
the FT-100's DSP utilises multi-parameter analysis for
efficient processing and reduction of incoming noise. A
total of 16 Noise Reduction settings are available for
best results under changing conditions.
* Automatic Seeking Notch Filter: For removal of
annoying carriers or heterodynes, the DSP Notch Filter
will identify and suppress one or more such signals
automatically, thus improving copy and reducing operator
* Microphone Equaliser :
To match the FT-100's transmitter audio response to the
waveform produced by your voice and the microphone in
use, the DSP system includes a three-position Mic
Equaliser circuit. The result is increased "talk
power" as extraneous frequencies are suppressed,
allowing all available power to be concentrated into
your voice's pattern.
Electronic Keyer: The FT-100's built-in Electronic Keyer
includes Dot : Space and Dash : Space weight adjustments.
* CW Message Memory : For repetitive "CQ DX"
or "CQ TEST" messages, the FT-100 includes a
50-character CW Message register.
* CW Full Break-in (QSK) : Both "Full QSK" and
"Semi-Break-In" CW modes are available, with
excellent keyed waveforms in both modes.
* CW "Reverse" Reception : When interference
is encountered in the CW mode, the "Reverse"
feature allows the injected sideband to be changed
between "USB" and "LSB" by a simple
press of the "MODE" switch on the front panel.
* CW Pitch/Sidetone Control : The CW PITCH control
allows the transmitted signal to be offset
400/500/600/700/800 Hz from "zero beat" with
the receive frequency. This adjustment simultaneously
varies the center frequency of the RX passband (including
the DSP BPF), as well as the CW Sidetone's pitch. The
sidetone therefore serves as a "Spot" signal
* Optional CW Filters : Available options for the FT-100
include the 500 Hz XF-117C and 300 Hz XF-117CN crystal
filters. both of which may be installed at the same
FUNCTION "SELECT" KNOB
panel's SELECT knob acts as a Quick-QSY dial for tuning,
with independent steps on different bands and modes. The
SELECT knob is also used for Memory Channel and MENU
item selection, as well as CLARIFIER tuning and IF SHIFT
on a wide variety of data modes, including 1200/9600 bps
FM packet, RTTY (AFSK), or SSTV, the rear- panel's 6-pin
mini-DIN connector provides easy access to Data I/O
lines, plus PTT and Ground.
|* VFO Scan:
Scan up or down the band in the VFO mode.
* Memory Scan : Scan
within the current Memory Group, or scan all the
* Programmable Memory Scan (PMS): Use PMS to scan within
band limits set by the special PMS memories.
*QMB Scan : When operating on the QMB channels, you can
also elect to scan just those memories. During
scanning operation, the FT-100 can be set up to Stop
completely when a signal is encountered; to Hold until
the incoming transmission ceases: or to Resume after a
delay of 1 to 10 seconds.
FEATURES FOR VHF/UHF OPERATORS
Repeater Shift: On the 144 MHz and 430 MHz bands, the
FT-100 will automatically activate the repeater shift
appropriate for the part of the band in which you are
* CTCSS/DCS Tone Systems : For repeater access, a CTCSS
Encoder is built into the FT-100 (FTS-27 Decoder
optional), and for advanced systems a 104-code Digital
Code Squelch system provides improved immunity from
* SmartSearch™: When visiting a new city, use the
Smart Search™ system to scan the FM band for activity.
When busy channels are found, they will be automatically
loaded into a special Smart Search™ Memory Bank, for
* Spectrum Scope: If you have to be away from your radio
for a few minutes, turn on the Spectrum Scope to keep
watch on band activity. The Spectrum Scope will create a
bar-graph display of activity an 15 channels above and
below your current operating frequency.
* ARTS™(Auto-Range Transponder System): During
Search-and-Rescue operations, the ARTS™ feature will
notify you if a field station (for example, a hand-held
unit) has gone out of communications range, so you can
instruct them to move to a better location.