I'm trying to get my node going again. It's online but I'm fighting bad echo. You hear the output looping into the input with a delay about the length of the word "One". So in a count you hear "ONE one TWO two " ...etc Confirmed with parrot. It's not local RX getting into TX, it's internal to the URI soundcard/cable/rx. I've tried with both rxboost on/off and re calibrating. It's not RFrelated as it does the echo with the TX turned off. Radios are a pair of Motorola SM50's connected via 16pin to the URI. They go into a 4 can duplexor into the antenna. Audio is flat raw discriminator for the RX and direct to the modulator/ptt. The same radios/cavities worked just fine with a dvrptr to do d-star. The cable I used is a 25 pin Printer cable that is shielded /twisted pair. I just cut off one end, traced the wires and soldered them to the 16 pin. I've tried 2 different PC's with ACID then DIAL distro's. Still same echo. If you would like a demo I'm node 2090 (W9DRR).. Wondering where to look, it's almost like a software mixer thing or something. 73 Don W9DRR