On 30 Oct 2023, at 14:45, yvan skopek via groups.io <yvskop@...> wrote:

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Hello dr om,

I use FT847 with SUCCI interface and no problems, I connect FT847 by his cable to SUCCI interface (eBay) you must specified then it is for FT847.

I use it more then 10 years with UCX Log and SatPC32 prgm without problems...

vy 73 Yvan HB9CSM

Le lundi, 30 octobre 2023 à 11:35:19 UTC+1, TA2YGT <asena.34.ask@...> a écrit :

Hello everyone,

I bought a second hand Yaesu FT847 and then I was build a isolated interface for DATA IN/OUT port. It works very well but I haven't build null modem cable for CAT control.

I am not familiar with the CAT communication protocol. I use FTDI for PTT control. In FTDI, RX and TX ports are empty and I want to use these ports because I want to using interface one USB cable. Of course, using optocoupler. How can I do it? How should I connect the optocouplers or what kind of circuit should I create?

Thx and 73.

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Yvan