I built the USB Rig interface that I mentioned in my last post and it turned out great.
I have it interfaced with my old Icom IC-281H. I made a few changes to the original plans.
1) Instead of the PS/2 connector used in G4ILO’s setup, I decided to use a TinyTrak/KPC3 compatible DB-9 Radio interface cable.
2 ) I also omitted the bypass switch. I didn’t think I would need it.
3) I left out the trimmer pot (I forgot to buy it, tried it without it and it works fine…)
I am very happy with the result… I am now running an APRS base without spending a lot of cash on a hardware TNC.
Thanks again for the great circuit G4ILO!