I've had this same issue. First on my Portable and now it is even happening on a loaner unit. The transmit path on the device seems to work better than the receive path. I did improve the receive by hooking up an external antenna to the B antenna port. It's still not as good as the Brick, but 2nm range is acceptable for collision avoidance. Without the second antenna I was only seeing about 1 mile range on Saturday and Sunday. Monday I flew with an external antenna and was getting 2 miles more consistently and that was just with the panel antenna tossed up on the left side of the glare shield.

On Tuesday, August 27, 2013 7:56:37 AM UTC-7, Tony wrote:
I'm in Moriarty flying a Sparrowhawk and am having trouble with me portable. It seems yo be transmitting fine but the only time I've received Farm targets is when I'm on the grid. It is receiving transponder and ADSB traffic just fine.



You may recall that I recently replaced as broken antenna. However I'm pretty sure that farm targets were showing up when a friend borrowed my portable at Region 10 South.



Any suggestions?