Hi,
thank you for getting back to me.
I just got it to work. 
I tried the Eve/Net without a fuse in any unit and obviously it did not work.
I also tried a 2A fuse without luck. That one blew as well.
So basically we tested everything except that cheap T adapter!
I bought three of them because why not. They were cheap. One of them i openend up to check the connections. Another one i used to connect the remote with the two Orvilles.
Show More...I was under the impression they were identical. They are not. One of them is bad. I just tried the third one and it works! There must be a short in the other one.
I should have checked that earlier…
Thanks a lot for your help.