FT-991 Technical Supplement
Specications
SPECIFICATIONS-1
General
Rx Frequency Range: 30 kHz - 56 MHz, 118 MHz - 164 MHz, 420 MHz - 470 MHz (operating)
1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz (specied
performance, Amateur bands only)
Tx Frequency Ranges: 1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz (Amateur
bands only)
Frequency Stability: ±0.5 ppm (after 1 minute @+14 °F to +122 °F [–10 °C to +50 °C])
Operating Temperature Range: +14 °F to +122 °F (–10 °C to +50 °C)
Emission Modes: A1A (CW), A3E (AM), J3E (LSB, USB), F3E (FM), F7W (C4FM), F2D
Frequency Steps: 5/10 Hz (SSB, CW, & AM), 100 Hz (FM, C4FM)
Antenna Impedance: 50 Ohms, unbalanced
16.7 - 150 Ohms, unbalanced (Tuner ON, 1.8 MHz - 30 MHz Amateur
bands)
25 - 100 Ohms, unbalanced (Tuner ON, 50 MHz Amateur band)
Power Consumption (Approx.): Rx (no signal) 1.8 A
Rx (signal present) 2.2 A
Tx 23 A (HF/50 MHz 100 W)
15 A (144/430 MHz 50 W)
Supply Voltage: DC 13.8 V ± 15% (Negative Ground)
Dimensions (WxHxD): 9.0” x 3.2” x 10.0” (229 x 80 x 253 mm)
Weight (Approx.): 9.5 lbs (4.3 kg)
Transmier
Power Output: 5 - 100 was (2 - 25 was AM carrier)
Modulation Types: J3E (SSB): Balanced,
A3E (AM): Low-Level (Early Stage),
F3E (FM): Variable Reactance
F7W (C4FM): 4-level FSK
Maximum FM Deviation: ±5.0 kHz/±2.5 kHz
Harmonic Radiation: Beer than –50 dB (1.8 MHz - 30 MHz Amateur bands)
Beer than –63 dB (30 MHz Amateur band)
Beer than –60 dB (144 MHz, 430 MHz Amateur bands)
SSB Carrier Suppression: At least 50 dB below peak output
Undesired Sideband Suppression: At least 50 dB below peak output
Bandwidth: 3 kHz (LSB/USB), 500 Hz (CW), 6 kHz (AM), 16 kHz (FM/C4FM)
Audio Response (SSB): Not more than –6 dB from 300 to 2700 Hz
Microphone Impedance: 600 Ohms (200 to 10 kOhms)
