This information is on the Wiki if you bother to look for it.
I did "bother to look for it" but I would prefer the pre-amp/filter board to be....
A-be mounted in the QS1R box
B-be made FOR the QS1R by the same designer.
Did you "bother to look" and see I'm an SWL not a Ham....why would I want a Hermes?!