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Yaesu FT-991

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HF/VHF/UHF All Mode Transceiver

Specifications
Type
Mobile Amateur HF Transceiver 
Frequency range RX
0.3-56 / 118-164 / 420-470 MHz 
TX
1.8-430 MHz (amateur bands only) 
Frequency stability
±0.5 p.p.m. (after 1 minute @+14 °F to +140 °F [–10 °C to +60 °C]) 
Tuning steps
5/10 Hz (SSB, CW), 50/100 Hz (AM, FM) 
Filters
3 kHz (LSB/USB)
500 Hz (CW)
6 kHz (AM)
16 kHz (FM) 
Receiver
Modulations
AM / FM / CW / USB / LSB / FSK / AFSK 
Sensitivity
SSB/CW (10 dB S+N/N)
0.158 µV (1.8 - 30 MHz) (RF AMP 2 “ON”)
0.125 µV (50 - 54 MHz) (RF AMP 2 “ON”)
0.125 µV (144 - 146 MHz) (RF AMP 2 “ON”)
0.125 µV (430 - 440 MHz) (RF AMP 2 “ON”)
AM (10 dB S+N/N, 30 % modulation @400 Hz)
28 µV (0.1 - 1.8 MHz) (RF AMP 2 “ON”)
2 µV (1.8 - 30 MHz) (RF AMP 2 “ON”)
1 µV (50 - 54 MHz) (RF AMP 2 “ON”)
FM (12 dB SINAD)
0.5 µV (1.8 - 30 MHz) (RF AMP 2 “ON”)
0.25 µV (50 - 54 MHz) (RF AMP 2 “ON”)
0.18 µV (144 - 146 MHz) (RF AMP 2 “ON”)
0.18 µV (430 - 440 MHz) (RF AMP 2 “ON”) 
Selectivity
Mode –6 dB / –60 dB
SSB/CW (Width=2.4 kHz) 2.4 kHz or better / 3.6 kHz or less
CW-N (Width =500 Hz) 0.5 kHz or better / 750 Hz or less
AM 6 kHz or better / 15 kHz or less
FM 12 kHz or better / 30 kHz or less
FM-N 9 kHz or better / 25 kHz or less 
Receiver system
SSB/CW/AM: Tripe conversion
FM: Double conversion 
IF-frequencies
69.450 MHz
9.000 MHz (SSB, CW, AM)
24 kHz (SSB, CW, AM)
450 kHz (FM) 
Image rejection
70 dB or better (1.8 MHz - 50 MHz Amateur bands)
60 dB or better (144/430 MHz Amateur band) 
Audio output
2.5 W into 4 Ohms with 10% THD 
Transmitter
Modulations
AM / FM / CW / USB / LSB / FSK / AFSK 
RF-output
HF: 5-100 W, VHF/UHF: 5-50 W 
Connections
Antenna
SO-239 
Impedance
50Ω 
Electrical
Power requirements
13.8 V DC 
Current drain RX
2.2 A max 
TX
22 A max 
Physical
Dimensions (w×h×d)
229 × 80 × 253 mm (9.02 × 3.15 × 9.96 in)  
Weight
4.3 kg (9.5 lbs)  
Form factor
Mobile 
Manufactured
Between 2014 and 20xx  
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
Yaesu 
Model
FT-991
Features
 
Manuals, Diagrams and Brochures
 
None available  
 
 
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