Here you have some videos of the tests I made with a colleague from Belgium on 40m USB last Friday. As you can see on the following video, we also tried 20m but without success.
Then we decided to go back to 40m USB and test his PRC-320. First we used the 100W power amplifier and then we tried the standard 30W output.
We also tried different antennas for the PRC-320. All in all it was a difficult test because there was strong QRM from other stations.