Yaesu FT 991A Transceiver

Receive frequency coverage

30 kHz–56 MHz, 118 MHz–164 MHz, 420 MHz–470 MHz (specified performance; amateur bands only) Reference

Transmit frequency coverage

1.8 MHz–54 MHz, 144 MHz–148 MHz, 430 MHz–450 MHz (amateur bands only) Reference

Bands

HF/50/144/430 MHz all-mode Reference

Modes

CW, AM, SSB (LSB/USB), FM, C4FM, Packet Reference

RF output power

160–6 meters: 100 W SSB/CW/FM, 25 W AM carrier; 2 meters/70 centimeters: 50 W SSB/CW/FM, 12.5 W AM carrier Reference

Power requirement

DC 13.8 V ±15% Reference

Frequency stability

±0.5 ppm (−10°C to +50°C, one minute after power-on) Reference

Frequency resolution

5/10 Hz (CW/SSB/AM); 100 Hz (FM, C4FM) Reference

Operating temperature

−10°C to +50°C Reference

Dimensions

9.0 × 3.2 × 9.3 inches (W × H × D), excluding knobs and connectors Reference

Weight

9.5 lb Reference

Antenna impedance

50 Ω unbalanced with antenna tuner off; HF: 16.7–150 Ω unbalanced with tuner on; 50 MHz: 25–100 Ω unbalanced with tuner on Reference

Specifications may vary by revision or market. Use linked manufacturer references when available and confirm critical details before purchase.