good point! The SMA was adapted by a SMA to BNC already in my version, but then there isn´t space to plug quickly the SHV or BNC...Now that the enclosure is a bit bigger it is no longer necessary to use the tiny SMA connector for the signal, so no special adaptor cable required.
good! I still try to find the best volume :)...so I have built this one with the trimmer pot on the side, so it can be adjusted without opening the case
...maybe next version has a SD micro card to record the signals...