How to Find Coax Cable Size?

Discussion in 'General Electronics Chat' started by electronewb, May 17, 2015.

  1. electronewb

    Thread Starter Member

    Apr 24, 2012
    260
    3
    Hi guys I bought some of those RP Female SM panel mount connectors Unfortunately they didn't come with any specs I assumed they were for RG174 cable but what I already have for RG174 cable O.D is way too small there's no way those connectors are for RG174 or RG58U (cable is too big) If I take my calliper and measure the crimp ring (bottom piece on the picture) I get those measurements

    Outside Diameter of the ring = 0.200"
    Inside Diameter of the ring = 0.171"

    Which measurements do I go buy to find the right type of cable?

    Thanks
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,418
    3,355
    That is an SMA connector.
    What are you trying to connect?
     
  3. electronewb

    Thread Starter Member

    Apr 24, 2012
    260
    3
    Extend a 5.8Ghz antenna I don't think RG174 goes that high anyways. That leaves me with LMR cables but according to this http://www.accesswds.com/DataSheets/Cable_Comparison.pdf
    RG174 is the same size as LMR100 so that wouldn't work ( too small) and LMR 200 is the same size as RG58U (too big) That leaves me with RG 316 I know it's not the right way of doing this but I can't wait a month to get that stuff off ebay and the store where I bought the connectors only had those in stock and I need RP female SMA which is a bit harder to find as well!!
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,418
    3,355
    It could be for RG402.
     
  5. electronewb

    Thread Starter Member

    Apr 24, 2012
    260
    3
    Almost but I need 2.3mm or less for the insulation and the RG402 is 3.6mm but it's pretty close!!!
     
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