Yaesu FT-991A

| diciembre 7, 2020

Yaesu FT-991A


Explore the Vast Ocean of Radio waves HF through UHFYaesu FT-991A

(Wide-Coverage Transceiver)

With Real-Time Spectrum Scope and Multi-Color Waterfall Display

An all-around model with a built-in real-time spectrum scope and superior basic performance

All modes from HF to UHF bands condensed into a small body

Covers the amateur radio bands from 160 m to 70 cm, and is capable of all modes SSB/CW/AM/FM, even the high-definition C4FM digital mode. All this condensed into a compact body W: 9″x H: 3.2″x D: 10″ (229 x 80 x 253 mm). This is all the radio you will need to enjoy the wide world of amateur radio.


Supports Real-Time Spectrum Scope with Multi-Color Waterfall Display

Instantly evaluate band conditions with the built-in real-time spectrum scope

Listen to the received audio while tuning with the built-in high resolution real-time spectrum scope. Instantly evaluate ever-changing band conditions and easily find the desired signals. TX and RX markers are displayed

on the scope for immediate grasp of the relationship between the TX and RX frequencies. The display color of the scope screen can be selected as desired

Supports multi-color waterfall display

The waterfall display function presents the strength of the RX signals using color variations flowing with time. This allows for visual recognition of even the faint signals which rarely appear as peaks,

offering a more detailed view of the band. The colors of the waterfall screen can be selected from seven color displays or multicolor.

Latest Touch Panel Operation, Combined With Traditional Front Panel Layout, Achieve Optimal Ease of Use

3.5 Inch full color touch panel display for convenient comfortable operating

■ Full color TFT LCD display provides useful information about function status and settings at a glance

■ Highly responsive panel with functional design and intuitive layout makes touch operation a pleasure

■ Four user-customizable function keys offer quick access to mode-dependent assignments, Traditional layout of Main Dial knob and related controls makes experienced users feel right at home

Uncompromising Circuit Design Ensures Excellent Receiver Performance from HF to VHF/UHF

Sophisticated receiver front end engineering is on a par with FTDX Series Transceivers

■Triple conversion with 1st IF frequency of 69.450 MHz for all bands * SSB/CW/AM

■ 1st IF stage implements a narrow bandwidth 3 kHz roofing filter as standard equipment

Designed for outstanding adjacent multi signal characteristics, not only in HF but also in VHF and UHF bands.

■Features the highly acclaimed quad mixer of the FTDX series transceivers, along with a dedicated VHF/UHF mixer

The 1st IF mixer for HF/50 MHz features a quad mixer with four 3SK294 dual-gate MOS-FET devices that assure extremely low noise, excellent intermodulation characteristics, and high dynamic range. A dedicated VHF/UHF mixer, separate from the HF bands, permits design optimization for targeted frequencies, and results in superior performance characteristics.


RF amplifier design is optimized for each band

■Selectable IPO/AMP1/AMP2 (HF/50 MHz) settings for optimized operation with any received signal

■ Separate RF amplifiers provide the best characteristics for each band The IPO, AMP1 and AMP2 selections for the HF/50 MHz bands allow matching the settings to the current band and conditions, to ensure optimal RF amplifier operation. The RF amplifier for the 430 MHz band uses high-electron-mobility transistor (HEMT) NE3509 devices which maintain good performance into the GHz range, and combine high gain with a low NF (Noise Figure).


The YAESU IF DSP is Famous for Superb Interference Rejection

Same high-speed floating point DSP as used in FTDX Series

The high speed floating point DSP chip TMS320C6746 (3000 MIPS / 2250 MFLOPS) from Texas Instruments, makes possible excellent interference rejection with actual signals under real-world conditions, not only in the HF but also in the VHF and UHF bands.


Highly effective interference rejection

The IF WIDTH and IF SHIFT functions are the basis for removing interfering signals and are easily implemented for the best effect. The efficacy of interference rejection is further enhanced by sophisticated functions inherited from the FTDX series, such as the 16-stage digital noise reduction and the DNF (AUTO NOTCH) filter that rapidly tracks even multiple heterodynes. The CONTOUR function that enhances the desired signal with a natural sound, and the NOTCH function with selectable bandwidth, along with other functions are provided for comfortable and convenient DX and Contest QSO operation.

Final Stage with Ample Power Reserves: 100 W for HF/50 MHz Band and 50 W for VHF/UHF Band

High quality push-pull amplifier with 100 watts for HF/50 MHz

Using a push-pull arrangement of RD100HHF1 MOS-FET devices, renowned for excellent performance in the HF/50 MHz range, the amplifier delivers 100 watts of low-distortion, high-quality power.

High speed 1.8 to 54 MHz antenna tuner included as standard equipment

The high speed digital tuner employs relay switching and features a large 100-channel tuning data memory. This allows the user to instantly call up optimum matching conditions for previously used frequencies.

50 W amplifier for VHF/UHF assures plenty of power for high frequency bands

The final amplifier for the VHF and UHF bands uses the high-output MOS-FET RD70HUF2 device which incorporates two MOS-FETs in a single package, providing ample output power of 50 watts.


Support for Advanced C4FM Digital Functions

■ V/D mode for simultaneous transmission of voice and data with powerful error correction optimal for mobile use, and Voice FR (Full Rate) mode for high quality audio transmission

■ AMS function instantly recognizes digital mode or FM mode and enables mutual communication

■ GM (Group Monitor) function allows handy on-screen display of group members that are within communication range

■ 126 types of DSQ (Digital Squelch) enable specific selection of communicating stations

■ Supports high-definition Amateur Radio WIRES-X internet connection, utilizing C4FM digital technology

* Does not support operation of WIRES-X digital node stations.

* Does not support sending and receiving of images via C4FM digital.

Basic function

Versatile Array of Functions for CW Operation

■ Advanced electronic keying (4 to 60 wpm) with FULL BK-IN support

■ Electronic Keyer Weight control (2.5 – 4.5)

■ CW side tone pitch frequency adjustable (300 -1050 Hz)

■ Message Memory function (5 ch x 50 characters)

■ APF function with 3-stage bandwidth selection improves S/N ratio for enhanced intelligibility

■ Auto Zero-in function facilitates subtle tuning operations for CW

■ Automatic «Beacon» keyer mode

■ CW SPOT Feature

■ CW Mode reversal (USB or LSB injection)

Convenient Functions for FM Mode

■ 104 types of DCS (Digital Code Squelch)

■ ARS function provides easy repeater access

■ 50-tone CTCSS Encoder/Decoder for FM operation

Useful and Convenient Functions

■ Speech Processor Parametric MIC EQ Five-channel digital voice message memory function for repetitive voice messages MULTI dial design facilitates setting operations White LED Key button Illumination

■ Independent AF GAIN, RF GAIN and CLAR/VFO-B knobs «FH-2 Remote Control (Optional) «VOX «MOX «99 channel memory (supports memory group view, 12 alphanumeric characters) RTTY/D ATA Jack

■ TUN/LIN connector allows connection of optional VL-1000 or FC-40 Wide Band Receive Capability (30kHz-56MHz, 118-164MHz, 420-470MHz) CS key brings up a preselected menu with a single touch

■ USB port allows connection to a PC with a single cable (CAT control, Audio In/Out interface, PTT/RTTY(FSK) SHIFT control) ■ High Stability 0.5 ppm TCXO Carrying Handle ■ Tilt Stand


Yaesu FT-991ARear Panel


FT-991A Firmware Update


Transceiver is used hereafter to refer to the YAESU FT-991A transceiver. (This firmware is not compatible with the FT-991 transceiver)

Amateur Radio \ Manuals \ Digital

FT-991A WIRES-X Node Operation Instruction Sheet (12/21/17)  ( 1.11 MB )

Amateur Radio \ Manuals \ HF/Satellite Transceivers and Amps

FT-991A CAT Operation Reference Manual (1711-D) 11-08-17  ( 1.32 MB )

      FT-991A Deutsch Operating Manual  ( 33.08 MB )
      FT-991A Firmware Upgrade Manual  ( 1.79 MB )
      FT-991A French Operating Manual  ( 33.00 MB )
      FT-991A Instruction Manual (GM Edition)  ( 2.15 MB )
      FT-991A Instruction Manual (WIRES-X Edition) 12/20/17  ( 4.44 MB )
      FT-991A Italiano Operating Manual  ( 33.20 MB )
      FT-991A Operating Manual (2006J-FS-1)  ( 33.82 MB )
      FT-991A Spanish Operating Manual  ( 33.00 MB )
      M-1 Reference Microphone Operation Manual  ( 2.86 MB )

Amateur Radio \ Software

FT-991A All current Firmware including the New Update DSP Ver. 01-12 (06/24/20)  ( 4.45 MB )

      FT-991A Update Firmware Information 06/24/20  ( 252.45 KB )
      FT-991A/ SCU-17 USB Driver (Virtual COM Port Driver)  ( 3.74 MB )
      FT-991A/ SCU-17 USB Driver Installation Manual  ( 415.69 KB )
      FT-991A_SCU-17 USB Driver Installation Manual (1909-C)  ( 594.19 KB )


Yaesu FT-991A MARS MOD

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