On Friday, May 31, 2019 at 4:50:08 PM UTC-4, BG wrote:
I witnessed something pretty strange this last weekend several Cambridge Model 20 GPS stopped working. I have used it for years connected to my SN10b with zero problems. This last weekend I saw on the SN10 display, no GPS signal in the last 10 seconds over and over. Indeed it wasn't updating. I had a spare and another glider had a Model 20 that also stopped working in their glider. Has there been some type of change to the GPS signals being sent from the satellites?

This was very strange?

Buzz Graves

I expected wrong dates (from wrong GPS epoch beginning 7-April-2019),
but you still should get *something* out of the model 20.
Make sure you're running SN10 firmware version 2.45:
http://www.nadler.com/sn10/SN10_Resource_Index.html

What were the other model 20's connected to?

Anyway, its time to upgrade to a PowerFLARM and retire the '20!