Yaesu FT-991A HF/VHF/UHF All Mode Transceiver
The Yaesu FT-991A is an all-band, multimode portable transceiver that includes capabilities for CW, AM, FM, SSB, and Digital Modes (Packet, PSK31, RTTY, and C4FM) with 100 Watts of HF/50mhz Capability (50 Watts VHF/UHF). It features a high-resolution full-color 3.5″ TFT Touch panel, which enhances operability and visibility.
The FT-991A is designed for competitive operating situations and offers a suite of features to enhance the user experience whether operating at home, mobile, or in the field. It also includes a 32-bit Digital Signal Processing System and a 3kHz Roofing Filter to improve performance and audio quality.
GENERAL
| RX Frequency Range | 0.03 – 56MHz, 118 – 164MHz, 420 – 470MHz (operating), 1.8 – 54MHz 144 – 148MHz, 430 – 450MHz (specified performance, Amateur bands only) |
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| TX Frequency Ranges | 1.8 – 54MHz, 144 – 148MHz, 430 – 450MHz (Amateur bands only) | |
| Frequency Stability | ±0.5 ppm (after 1 minute @ -10°C to +50°C | |
| Operating Temperature Ranges | -10°C to +50°C | |
| Emission Modes | A1A (CW), A3E (AM), J3E (LSB, USB), F2D, F3E (FM), F7W (C4FM) | |
| Frequency Steps | 5/10Hz (SSB, CW, AM), 100Hz (FM, C4FM) | |
| Antenna Impedance | 50 Ohms, unbalanced 16.7 – 150 Ohms, unbalanced (Tuner ON, 1.8 – 30MHz Amateur bands) 25 – 100 Ohms, unbalanced (Tuner ON, 50MHz Amateur band) |
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| Power Consumption (Approx.) | RX (no signal) | 1.8A |
| RX (signal present) | 2.2A | |
| TX | 23A (HF/50MHz 100W), 15A (144/430MHz 50W) | |
| Supply Voltage | DC 13.8V ±15% (Negative Ground) | |
| Dimension | 229 (W) x 80 (H) x 253 (D) mm | |
| Weight | 4.3kg | |
TRANSMITTER
| Power Output | HF/50MHz: 5 – 100 watts (2 – 25 watts AM carrier) 144/430MHz: 5 – 50 watts (2 – 12.5 watts 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 | ±5.0kHz / ±2.5kHz |
| Harmonic Radiation | -50dB (1.8 – 30MHz Amateur bands) -63dB (1.8 – 30MHz Amateur bands, above 30MHz)*1 -63dB (50MHz Amateur bands) -60dB (144MHz, 430MHz Amateur bands) |
| SSB Carrier Suppression | At least 50dB below peak output |
| Undesired Sideband Suppression | At least 50dB below peak output |
| Bandwidth | 3kHz (LSB/USB), 500Hz (CW), 6kHz (AM), 16kHz (FM/C4FM) |
| Audio Response (SSB) | Not more than -6dB from 300 to 2700Hz |
| Microphone Impedance | 600 Ohms (200 to 10 kOhms) |
RECEIVER
| Circuit Type | SSB/CW/AM: Triple-conversion Super heterodyne FM/C4FM: Double-conversion Super heterodyne |
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| Intermediate Frequencies | SSB/CW/AM: 69.450MHz/9.000MHz/24kHz FM/C4FM: 69.450MHz/450kHz |
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| Sensitivity | SSB/CW (BW: 2.4kHz, 10dB S+N/N) 0.158µV (1.8 – 30MHz) (AMP2), 0.125µV (50 – 54MHz) (AMP2) 0.11µV (144 – 148MHz), 0.11µV (430 – 450MHz) AM (BW: 6kHz, 10dB S+N/N, 30% modulation @ 400Hz) 5µV (0.5 – 1.8MHz) (AMP2), 1.6µV (1.8 – 30MHz) (AMP2) 1.25µV (50 – 54MHz) (AMP2) FM (BW: 15kHz, 12dB SINAD) 0.35µV (28 – 30MHz) (AMP2), 0.35µV (50 – 54MHz) (AMP2) 0.18µV (144 – 148MHz), 0.18µV (430 – 440MHz) There is no specification for frequency ranges not listed. |
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| Squelch Sensitivity (TYP) | SSB/CW/AM 1.0µV (1.8 – 30MHz, 50 – 54MHz, AMP 2) 1.0µV (144 – 148MHz, 430 – 450MHz) FM 0.35µV (28 – 30MHz, 50 – 54MHz, AMP 2) 0.125µV (144 – 148MHz, 430 – 450MHz) There is no specification for frequency ranges not listed. |
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| Selectivity |
Mode |
-6 dB |
-60 dB |
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CW |
0.5kHz |
0.75kHz |
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| Image Rejection | 70 dB or better (160 – 6m Amateur bands) 60 dB or better (2m, 70cm Amateur bands) |
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| Maximum Audio Output | 2.5W into 4 Ohms with 10% THD | ||
| Audio Output Impedance | 4 to 8 Ohms (4 Ohms: nominal) | ||
| Conducted Radiation | Less than 4 nW | ||
Specifications are subject to change, in the interest of technical improvement, without notice or obligation, and are guaranteed only within the amateur bands.
Supplied Accessories
- Hand Microphone MH-318AJ • DC Cable T9025225
