I recently discovered that you have to load different firmware for the APRS and packet radio functions
I was hoping to easily switch between the two, but no big deal.
I've started constructing my switch box...I got the A/B box and velcro'd the TT4 and a little A/B for 3.5mm I had in my junk drawer around.
It's not pretty, but it should work...I need to run by Rat Shack and pickup some cables.
I may need a little help with the TT4 software...I looked at it and it was confusing me. I'll post when I'm ready for that...
Here's a (blurry) pic