Yaesu FT-991A

Yaesu FT-991A firmware

Yaesu · FT-991A · FT-991A · HF transceiver

Latest firmware for the Yaesu FT-991A is v2.07 (June 18, 2024).

Specifications

FT-991A specifications

Type
Amateur HF/VHF/UHF transceiver (System fusion concept)
Frequency range
TX: 10-160 m + WARC / 6 m / 2 m / 70 cm / RX: 0.03-56 / 118-164 / 420-470 MHz
Modes
AM / FM / NFM / SSB / CW / RTTY / PSK / DV (C4FM)
Show the full specification

General

Mode
AM / FM / NFM / SSB / CW / RTTY / PSK / DV (C4FM)
Type
Amateur HF/VHF/UHF transceiver (System fusion concept)
Weight
4.3 Kg (9.5 lb)
Power supply
13.8 VDC ±15%
Tuning steps
5 / 10 / 100 Hz, 1 KHz
Other features
3.5" color touchscreen. CTCSS/PL and DCS. High speed spectrum scope. 32-bit IF-DSP. Built-in automatic antenna tuner. USB connector. CAT & GPS connector.
Frequency range
TX: 10-160 m + WARC / 6 m / 2 m / 70 cm RX: 0.03-56 / 118-164 / 420-470 MHz
Dimensions (W*H*D)
229*80*253 mm (9*3.2*10")
Frequency stability
±0.5 ppm @ -10 to +50°C (14 to 122°F), after 1 minute warmup
Repeater shift/offset
10 m: ±10 KHz to 1 MHz (10 KHz steps) 6 m: ±10 KHz to 4 MHz (10 KHz steps) 2 m: ±10 KHz to 4 MHz (10 KHz steps) 70 cm: ±10 KHz to 10 MHz (10 KHz steps)
Channels / memory management
99 regular with alpha tags (12 characters) 9 PMS (Band edge pairs) 5 QMB (Quick Memory Banks) Non-volatile EEPROM storage
Antenna impedance / connector
50 ohm (Tuner on, HF: 16.7-150 ohm, 6 m: 25-100 ohm) / Two SO-239 (One SO-239 + one N-jack for Europe)
Current drain / power consumption
RX: 1.8 to 2.2 A TX: Max 23 A

Miscellaneous

Manufactured
Japan, 2016-202x

Receiver Section

Selectivity
AM 6 KHz (-6 dB) 15 KHz (-60 dB) FM 12 KHz (-6 dB) 30 KHz (-60 dB) SSB 2.4 KHz (-6 dB) 3.6 KHz (-60 dB) CW/RTTY/PKT 500 Hz (-6 dB) 750 Hz (-60 dB)
Sensitivity
AM (6 KHz - 10 dB S+N/N) 0.5-1.8 MHz: 5 uV (Amp 2 on) 1.8-30 MHz: 1.6 uV (Amp 2 on) 50-54 MHz: 1.25 uV (Amp 2 on) FM (15 KHz - 12 dB SINAD) 28-30 MHz: 0.35 uV (Amp 2 on) 50-54 MHz: 0.35 uV (Amp 2 on) 144-148 MHz: 0.18 uV 430-440 MHz: 0.18 uV SSB/CW (2.4 KHz - 10 dB S+N/N) 1.8-30 MHz: 0.158 uV (Amp 2 on) 50-54 MHz: 0.125 uV (Amp 2 on) 144-148 MHz: 0.11 uV 430-450 MHz: 0.11 uV
Image rejection
HF/6 m: 70 dB 2 m/70 cm: 60 dB
Receiver system
Double conversion superheterodyne (FM/NFM/C4FM) 1st IF: 69.450 MHz 2nd IF: 450 KHz Triple conversion superheterodyne (AM/SSB/CW) 1st IF: 69.450 MHz 2nd IF: 9 MHz 3rd IF: 24 KHz
Squelch sensitivity
AM/SSB/CW (Threshold) 10-160 m / 6 m: 1 uV (Amp2 on) 2 m / 70 cm: 1 uV FM (Threshold) 10 m / 6 m: 0.35 uV (Amp2 on) 2 m / 70 cm: 0.125 uV
AF output power / speaker
2.5 W at 10% distortion / 4 ohm
External speaker connector
TS "Minijack" (3.5 mm), 4-16 ohm

Transmitter Section

RF output power
HF6 m2 m70 cm AM:2-25 W2-25 W1-12 W1-12 W FM/NFM:5-100 W5-100 W2-50 W2-50 W SSB (PEP):5-100 W5-100 W2-50 W2-50 W CW (DC):5-100 W5-100 W2-50 W2-50 W RTTY/PSK:5-100 W5-100 W2-50 W2-50 W DV (C4FM):5-100 W5-100 W2-50 W2-50 W
Modulation system
AM: Low-level, early stage FM: Variable reactance SSB: Balanced DV/C4FM: 4-level FSK
Spurious emissions
HF: Better than -50 dB 6 m: Better than -63 dB 2 m/70 cm: Better than -60 dB
Microphone input level
? mV
Max FM deviation (Factory set)
FM: ±5 KHz NFM: ±2.5 KHz
Microphone impedance / connector
200 ohm to 10 Kohm (600 ohm nominal) / 8-pin (Modular)

Changelog

FT-991A firmware changelog

  1. v2.07 first tracked

Firmware history

All versions below were published by Yaesu on yaesu.com. Third-party and modified firmware is never listed.

  1. Version 2.07 Latest Released Jun 18, 2024 First seen Sep 6, 2026

    Source: yaesu.com

    Show release notes

    FT-991A Firmware Update and Version Identification The latest versions are listed below with the release dates.  MAIN Firmware Ver. 02- 07 (06/18/24) New  TFT Firmware Version 02-00 (10/17/17)  DSP Firmware Version 01- 12 (06/24/20)  C4FM DSP Firmware Version 04- 15 (12/02/16)  FT-991A_Firmware_Ver_Up_Manual_ENG_2405- C.pdf (06/3/24)

    • If you already have the above listed firmware versions, it is not necessary to update the FT-991A again.
    • The firmware version for Japan is different from the version on our website. The latest firmware of the Japanese version, please check the Japan WEB site: http://www.yaesu.com/jp/amateur_index/index.html .

    There are four different f irmware installations.

    Each installation must be followed carefully.

    Installing the wrong type of firmware may cause difficulties.

    Check your radio before installing firmware to be sure which updates are needed.

    Please read the FT -991​A Firmware Update Manual before proceeding.

    If multiple firmware installations are required the MAIN firmware should be installed first, as it is the only one that requires a press and hold of the [F(M-LIST)] key while turning the radio back ON.

    This resets the radio and locks in the new firmware .

    Before installing new firmware, please verify the current version firmware with the following procedure: (This image & version is for illustration only) Download the FT-991A data and [ FT-991A_MAIN_V0207_2406.zip ] from the following website: https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=490C 4A71118AD0F4E825E89D821B73BB&DivisionID=65&isArchived=0 The zip file contains all the current firm ware versions.

    Please verify which version of firmware is already on your radio before updating.

    If you have each of the listed versions, you do not need to update the radio again.

    Please read the FT -991A Firmware Upgrade Manual before proceeding!

    Implements improvements: Updates: MAIN V02-07 for web release (2024/06) New

    • Fixed the bug in MAIN V02 -06.

    Updates: MAIN V02-06 for web release (2024/06)

    1. Fixed the issue where the displayed frequency would change when QMB was operated during PMS.
    2. Changed the behavior of the A/B key during PMS to swap VFO A/B.
    3. Fixed the issue where the MIC EQ did not work when transmitting with VOX.
    4. Other functional improvements and optimizations have been made.

    NOTE

    • After updating the firmware; please reset the transceiver ​using the following procedure:
    1. Press and hold the [POWER] key on the front panel to turn the transceiver ON.
    2. While the transceiver is ON, disconnect the DC power cable from the DC-IN connector on the rear panel and turn the transceiver OFF.
    3. Press and hold the [FAST] and [LOCK] keys on the front panel, connect the power cable into the DC-IN connector on the rear panel and turn the transceiver ON.

    We hope this new firmware will increase your enjoyment of the FT-991A.

    Thank you for choosing Yaesu radios.

    If you have any problems or questions, please contact Yaesu, Amateur Tech Support amateurtech@yaesu .com .

    Thank you, Yaesu USA Yaesu USA | 6125 Phyllis Drive | Cypress, CA 90630 | 714.827-7600 | FAX: 714.827-8100 http://www.yaesu.com

    Release notes & download

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