A few weeks ago I was approaching Benson MATZ on a Sunday. I made the standard three calls for MATZ transit with no reply so assumed that they were closed.
A few minutes later, on the same frequency, I heard what sounded like an exec. jet being cleared onto the ILS at Benson.
I called again and still got no answer and began to suspect my radio. Tried on Box 2 and still got no response. The radios worked perfectly for the rest of the day.
It seems very odd to me that they showed no interest in what I was doing when they were expecting IFR traffic.
I actually played safe and climbed above the MATZ although it involved going a lot higher to remain clear of cloud.