Just received an email from Dave Nadler who reassured me that having two devices connected to the PF, in my case (and it's his setup also), an SN10B and Butterfly display... absolutely works fine.

I was beginning to think that might have been my range issue.

He suggested I swap out my PF core with a known good one. Perhaps the receiver is faulty. That would account for my friends seeing my PF on their displays just fine... but I'm not getting reliable received PF tracks. Finding a local "friend" to swap out their PF core may be difficult since these are the same people I have to fly with to test things in the air. My next step may be to re-install the PF v6.06 firmware (can firmware be rolled back to earlier version?) and firmware on the Butterfly display (v3.4).

BTW, Steve Koerner... thanks for the "heads up" on the RF interference. I did get an increased issue with RF interference that caused a vhf radio squelch break ... that has since almost disappeared. You are right, the slightest changes in wiring routing can cause problems. My panel wiring was changed in a big way and that's when the problem started. In my case it was the power converter causing RF that converted 12V to a usb input on my PDA (Vertica V2).

Walt Rogers WX