On Saturday, June 3, 2017 at 9:00:55 PM UTC-7, JS wrote:
On Saturday, June 3, 2017 at 1:16:51 PM UTC-7, Echo wrote:
No the altitude reported indicates fine. It's where the airplane flashes when it gets pinged. I'll check with their north American distributor and see what info they have.

Give them a call in Scotland on Monday morning. They are quite responsive..
Jim

were you high enough to normally be in radar contact with ATC? Were you orientated so your antenna was not shielded from ATC by the fuselage? Do you have a long coax to the antenna? Do you have a low loss antenna cable? Do you have a ground plane under the antenna?