After several failed attempts, I put the repeater back in the corner. But a new day brings new opportunities. The next day, it works flawlessly. The router will find set up the router and hey presto I had wireless in places where I used to have only a gaping hole radio.
I tried even different positions of the router and have now found a satisfactory point. Pudding is in the. All in all it was not that difficult. In other words, hindsight is easier than foresight.