You may want to look at the elegant solution that Owen Duffy built at:
Dale W4OP
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Sent: Monday, February 17, 2020 5:21 PM
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[email protected]Subject: [nanovna-users] connectors grounding
Hi all,just a quick question,i notice the sma connectors on my vna are fragile where they join the pcb,i have some beter ones,i thought of fabricating a piece of copper sheet and mounting them on that,then connect them to the pcb usung coax pigtails,can the sma conector bodies be connected electricaly together ,ie the grounds,or insulated from each other?,cheers.73.