Agilent Infiniium 54855A broken BNC connector

• Agilent Infiniium 54855A broken BNC connector
  Posted by ARF on 08 Sep, 2023 12:36
• Hi guys, I'm looking for advice.
  
  During a delivery of the oscilloscope, the BNC connector AUX Trigger Input was mechanically damaged. The connector was crushed and cracked during the repair process. Some brittle alloy is used.
  
  I know it's not a very important connector, but it bothers me.
  
  Inside the scope this is a cable assembly BNC-SMB with a special metal cable (I do not know the type), although the connector itself is the most common.
  Probably the length of this cable assembly is also important.
  
  I'm thinking of trying to solder the cracks and buff the surface or replace the whole cable assembly, but I'm not sure about the length and the right materials.
  
  What is your advice?

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• #1 Reply
  Posted by coromonadalix on 08 Sep, 2023 14:08
• you should be able to find some of them
  
  cant recall  the one on the pcb   
  
  EDIT   SMB  i think     
  
  some SMB to chassis mount bnc connector ....
  
  
  like this :   or some ressemblance :   https://www.fairviewmicrowave.com/ra-smb-plug-bnc-female-cable-m17-113-rg316-coax-fmc2638316-p.aspx
  
• #2 Reply
  Posted by ARF on 08 Sep, 2023 14:12
• Yes, but what about the length and materials, do you see what kind of special cable is used?
• #3 Reply
  Posted by fant on 09 Sep, 2023 09:56
• Cable Belden 1673A.
  It is as a semirigid, but more flexible.
  Can be changed to a semirigid (same electrical characteristics).
  Mandi
• #4 Reply
  Posted by ARF on 11 Oct, 2023 21:03
• I removed this cable assembly. Now the difficulty is to get just such a connector. I don’t know its model and manufacturer, I searched for a long time, but I didn’t find anything like that.
  
  The cable is marked "4694122 & 5293001". A search says these are the patent numbers for the 1671A cable. Cable thickness 2.14mm. This means the cable type is RG-405. Does anyone have any idea what kind of connector this is?

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• #5 Reply
  Posted by TimFox on 11 Oct, 2023 22:39
• I think the gold-colored connector is an "SMB".
  Here is an example of search results from Pasternack about BNC-SMB cable assemblies that they will custom-assemble for you:
  https://www.pasternack.com/bnc-female-smb-plug-rg141au-cable-assembly-pe3w16934-p.aspx
• #6 Reply
  Posted by ARF on 11 Oct, 2023 22:44
• I myself can easily rebuild this assembly if I find this particular BNC connector.
• #7 Reply
  Posted by TimFox on 11 Oct, 2023 23:05
• I believe Pasternack may have that BNC connector.
  They are not cheap, but very reliable and their cable assemblies are well made and available in small quantities.
  You don't post a country--Pasternack is in the US
• #8 Reply
  Posted by ARF on 11 Oct, 2023 23:19
• I think no, this is the old and obsolete connector or Agilent custom type(
• #9 Reply
  Posted by TimFox on 11 Oct, 2023 23:43
• Then I suggest you replace that cable with a compatible unit from Pasternack or similar.