USB Soundcard / PTT Interface complete.

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!

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