Here’s how to set the jumpers in a SignaLink USB when connecting a Yaesu FT290R.
I found the jumper instructions on the Tigertronics website just a little too general, so this may save some time.
WARNING: I now think these are wrong. Please see my post of 27th July 2021.
The SignaLink works fine with PocketPacket on a Mac mini. ‘Use Vox for PTT’ was set in the PocketPacket Audio Modem preferences. The SignaLink delay knob was turned fully anticlockwise.
Using this setup I could receive and decode signals from a local packet test GM7RYR-10. I transmitted to the ISS packet digipeater but didn’t see any of my packets digipeated. However, I received my packets locally on my Yaesu FT60 and decoded them on a Raspberry Pi via Direwolf by WB2OSZ and Xastir.