I am willing to use several hybrids to cover the band, if I must. But
it would be helpful to use broadband hybrids so I don't need to use so
many. I appreciate the reference to the QST article on hybrid
construction. I will build one to see how much bandwidth I can get.
Would like to find a construction technique which yields wider
bandwidth tho. The PSCQ-2-32 from Mini-Circuits has a 3.2 to 32 MHz
bandwidth! Wonder how they do it.

The LO technique is not applicable for my design but it is interesting.
I will have to give it some thought to understand how it works.

Vinton