Hi Earl,
i take your advice and purchase the components tomorrow and then take a listen.
I think my amp (3w single ended 6B4G without feedback))is very sensitiv with the original crossover.
Maybe i need an other design.
You asked me about a measurement of the 806 tweeter-it is yet not possible for me but maybe in a month.A guy which i know has a proffesional measurement system,but he is very busy now .
When he take the measurement i will post it.
Best wishes,
frank