Thanks Wally, that protocol sounds good.? I see the mismatch curve is at much greater separations than I was thinking, with the smallest entry on the chart being 5 mils, which is close to the max specfied anyway.? I was worrying about if I warmed up the outer but not the inner, then fixed the lock, then let it cool, that might do some damage to an expensive socket, but I like your plan about only nipping the loick up lightly.
Thanks v much
Neil
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On 02/11/2023 23:36, I_am Wally via groups.io wrote:
Neil, there are several versions of the Microwave Connector Care document but this HP 1986 version has the most N connector data on pages 45-52, see in particular figure 19 on page 48 for the effect of a gap.
With my 905A I prefer to follow the manual instructions to butt out all gap but then engage the bidirectional lock knurled sleeve only as firmly as needed to keep the sliding load operating friction from disturbing the butted central line connection.
Play with the lock tightness and line end knob when not connected to any connector so you get a feel for the choice you have in lock firmness.? In my use the connection is brief, but if you should go off and leave the sliding load connected and then temperature cycle the lab, the habit of engaging the lock only as firmly as necessary for measurement will allow the lock clutch to slip if and when needed so the sliding load central line gives rather than pushing over the center conductor of the VNA instrument.
