Yaesu FT-991A all-mode HF/50/144/430 MHz 100 W transceiver

Yaesu FT-991A all mode HF/50/144/430

All-mode HF, 50, 144 and 430 MHz transceiver, 100 W HF/50 and 50 W V/UHF, C4FM, automatic tuner, spectrum and waterfall

The Yaesu FT-991A is an all-mode transceiver that brings together HF, 50, 144 and 430 MHz in a single compact unit, with receiver circuits derived from the FT-DX, C4FM digital and a real-time spectrum scope with waterfall.

Product description

The receiver is triple conversion with a 69.450 MHz first IF on all bands and a standard 3 kHz roofing filter. On HF/50 MHz it uses the FT-DX series quad mixer with four 3SK294 dual-gate MOS-FETs; for VHF/UHF it has a dedicated mixer. The RF stages are optimised per band, with selectable IPO, AMP1 and AMP2.

The Texas Instruments TMS320C6746 floating-point DSP (3000 MIPS / 2250 MFLOPS), the same as in the FTDX series, offers IF WIDTH and IF SHIFT, 16-level digital noise reduction, a DNF that removes even multiple beat tones, CONTOUR and selectable-width NOTCH.

The push-pull final stage with RD100HHF1 MOS-FETs delivers 100 W on HF and 50 MHz; on VHF/UHF the RD70HUF2 provides 50 W. The fast automatic tuner from 1.8 to 54 MHz is standard.

In C4FM it supports V/D mode, voice and data with error correction, and Voice FR mode for the highest audio quality. AMS instantly recognises digital or FM mode. There is Group Monitor and 126 DSQ codes; the high-speed FR data mode is not supported, so images cannot be sent.

The high-resolution spectrum scope with waterfall, unusual in this class, is complemented by the ASC function, which alternates scanning and listening. The 3.5" colour touch panel makes operation easy alongside the traditional controls.

Key features

Technical specifications