This is correct.  In order to work with the 817, 857, and 897 in HF modes, the squelch line must be cut.   

I had asked if this could be done in software or by jumper and the answer at the time was that cutting the line was the only solution.

See msg 2079 — the SQL line is the black wire.
—
Brian
> On Feb 23, 2019, at 5:56 PM, Basil Gunn <basil@...> wrote:
>
>
> I had to disconnect the the squelch pin in my mDin6 cable to get the
> FT-817 to work. There are some notes for the FT-817 HF SSB based AFSK
> and 1200/9600 bps FM operation here:
>
> https://github.com/nwdigitalradio/n7nix/blob/master/docs/RADIO_APP_NOTES.md
>
> /Basil n7nix
>
>
> jgindc1@... writes:
>
>> Using the DRAWS hat, I have had good success with AX25 packet using a
>> Kenwood V71, for example, running XASTIR, or sending and receiving winlink
>> messages using PAT.
>>
>> However, when I substitute my FT-817 for the V71, using the same cables for
>> data and rig control, the DRAWS DIN-6 connection appears to "short" the
>> audio from the FT-817 to ground.
>
>
>