Thank’s Johnmath, but there are the same suppliers as at Octopart.
Ordered the Airpax at Mouser, my client doesn’t mind waiting a while.
I’m supposed to be on vacation, but 2 gentlemen drove 250 km down here with 2 Threshold 4000’s and one Ross mixer-amp.
They had tried several techs, but none of them dare to stick their nose in those Thresholds
So maybe I can have some vacation after all, waiting for the switch