The drivers you are looking for are the: FT-991/ SCU-17 USB Driver (Virtual COM Port Driver) (3.74 MB). Go to the Yaesu web site and download the drivers for the FT-991. Do not connect a USB cable from your computer to the FT-991 until you load the drivers listed below. If something isn’t working, revert to step 1Ī. Follow the steps below and do them in order To be safe, always install the driver before connecting the radio to the computer.) I have been told that in Win 8 and W10, you do NOT have to install the drivers first, but I think it is good practice to install the drivers before connecting the radio. (These directions are based on a Win 7 OS. SET UP for the FT-991 using the internal sound card In this blog post, I did the research for you, and once you get all the software loaded, the right boxes selected and menu items changed it works! The FT-991 packs a TON of features, and this can be confusing. Not quite cowboy, you have to take a minute (or in my case about 40) and do some research, find the right directions online and then follow them to make sure everything is setup properly. “So, the FT-991 has a built in sound card. However, the FT-991 also do FSK RTTY as well as CW, (with its built in sound card) something that the Signalink cannot do. Some say it is the same sound card that is in the Yaesu SCU-17, Yaesu’s equivalent of the Signalink device.

The FT-991 comes with a built in sound card. No USB to Serial converter needed, so additional interface boxes – just a USB cable ( *Note, see farther down in the post as to which cable you want to purchase. CAT control as well as PTT via one USB cable from the computer to the radio. This post is about setting up digital communications with the FT-991/991a, with only a USB cable. I have tried the Buxcom, the West Mountain Radio ( The M8, yeah. Buxcom, West Mountain Radio, Signalink, and even MFJ is getting into the market with their own audio device. There are several different types of interface devices that you can purchase to make this connection. The software on the computer generates audio that goes from the computer sound card to the radio as well as from the radio to the sound card. Hams who are running PSK31 or JT65 or FT8/4 or some other digital mode are using a computer connected to an audio interface that is then connected to the radio. Some of you might might be new to digital communications on the ham bands, so let me start from the beginning. If you are running V2.2.0 with the 991 upgrade to V2.2.1. Version 2.2.1 appears to have FIXED the issue. when you try to connect the 991 you will see a “hamlib error” when you try to do the CAT connection. UPDATED – There is a BUG in WSJT-X V.2.2.0.

Yaesu 991a programming software