Yaesu FT991 User Manual

FT991 and WSJT-X setup
 Let’s set up the FT991 first
1. Click the Menu/Setup button and set the following menu items to these values (courtesy of
G4WJS):
i. 029 = 38400bps
ii. 030 = 10msec
iii. 031 = 38400
iv. 062 = OTHERS
v. 064 = 1500Hz
vi. 065 = 1500Hz
vii. 066 = OFF
viii. 068 = OFF
ix. 070 = REAR
x. 071 = DAKY
xi. 072 = USB
2. Exit the Menu/Setup and press the F (M-List) key, then set up the following buttons:
i. NAR/WIDE to WIDE
ii. NB doesn’t matter
iii. AGC = AUTO
iv. RF POWER = set to max drive power for your amplifier (if you use one). Mine gets to
full output at 25w
3. DT GAIN = you’ll have to fuss with this, as it affects the ALC. I set it so I get to max drive with
the WSJT-X power slider all the way up

Yaesu FT991 Specifications

General

Supply Voltage	13.8 V DC ±15%
Modes	SSB, CW, AM, FM
Receiver Type	Triple conversion superheterodyne
Antenna Impedance	50 ohms
Antenna Connector	SO-239
Current Consumption	22A (max)
Display	Color TFT LCD
IF DSP	Yes

Summary

FT991 Configuration Steps

FT991 Menu Setup Items

Configure FT991 menu items 029 to 072 for specific values like baud rate and others.

FT991 F (M-List) Key Settings

Set NAR/WIDE to WIDE, AGC to AUTO, and RF POWER for amplifier.

FT991 DT GAIN Adjustment

Adjust DT GAIN to manage ALC and achieve maximum drive with WSJT-X.

FT991 Mode Switching Strategy

FT991 Notch, Shift, Width Settings

Set NOTCH, CONT, DNR, DNF to off, and SHIFT/WIDTH to 0Hz/3000Hz.

Digital vs. SSB Mode Switching

Use band stack registers and menu item 070 to switch between digital and SSB modes.

FT991 USB Driver and COM Port Setup

Install FT991 USB Drivers

Download and install Yaesu USB drivers from the website.

Identify Silicon Labs COM Ports

Locate and note the new Silicon Labs COM ports in Device Manager.

WSJT-X Software Configuration

WSJT-X General Settings

Enable VHF/UHF/Microwave features and configure other general settings.

WSJT-X Radio Tab Setup

Configure CAT control, serial port, PTT method, and transmit audio source.

WSJT-X Audio Tab Setup

Set audio input to Microphone and output to Speakers (USB Audio CODEC).