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Last modified 2021-04-01

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Yaesu FT-991A

A picture of Yaesu FT-991A

SPECIFICATIONS

GENERAL
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
Tuning steps:5 / 10 / 100 Hz, 1 KHz
Frequency stability:0.5 ppm @ -10 to +50C (14 to 122F), after 1 minute warmup
Mode:AM / FM / NFM / SSB / CW / RTTY / PSK / DV (C4FM)
Channels/memory management: 99 regular
9 PMS (Band edge pairs)
5 QMB (Quick Memory Banks)
Non-volatile EEPROM storage
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)
Power supply:13.8 VDC 15%
Current drain/power consumption:RX: 1.8 to 2.2 A
TX: Max 23 A
Antenna impedance/connector: 50 ohm (Tuner on, HF: 16.7-150 ohm, 6 m: 25-100 ohm) / 2*SO-239
(1*SO-239 + 1*N-jack for Europe)
Dimensions (W*H*D):229*80*253 mm (9*3.2*10")
Weight:4.3 Kg (9.5 lb)
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.




RECEIVER SECTION
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
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
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)
Image rejection:HF/6 m: 70 dB
2 m/70 cm: 60 dB
AF output power/speaker:2.5 W at 10% distortion / 4 ohm
External speaker connector:3.5 mm, 4-8 ohm




TRANSMITTER SECTION
RF output power: HF + 6 m: 5-100 W (2-25 W AM)
VHF/UHF: 2-50 W (1-12 W AM)
Modulation system: AM: Low-level, early stage
FM: Variable reactance
SSB: Balanced
DV/C4FM: 4-level FSK
Max FM deviation:FM: 5 KHz
NFM: 2.5 KHz
Spurious emissions:HF: Less than -50 dB
6 m: Less than -63 dB
2 m/70 cm: Less than -60 dB
Microphone impedance/connector:200 ohm to 10 Kohm (600 ohm nominal) / 8-pin (Modular)
Microphone input level:? mV




MISCELLANEOUS
Manufactured:Japan, 2016-201x
Additional info: This is an updated FT-991 with realtime bandscope and multi-colored waterfall.

New price 2021 in Sweden: SEK 15995:-
Related documents: User manual (36.3 MB)
GM manual (2.3 MB)
CAT manual (1.4 MB)
Modifications and fixes:
Reviews:
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FP-1030A
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MH-31A8J
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MMB-90
VL-1000/VP-1000
YH-77STA
Active tuning antenna, manual
Active tuning antenna, automatic
Antenna base kit
Packet interface cable
VL-1000 linear amplifier connection cable
External automatic antenna tuner
Remote control keypad
Power supply, 13.8 VDC, 23 A (USA only)
Power supply, 13.8 VDC, 25 A
Desk microphone
Ultra-high fidelity desk microphone
Standard hand microphone
Hand microphone with DTMF pad
Mobile bracket
Linear amplifier/Power supply
Lightweight stereo headphones