[time-nuts] Special connector for Symmetricom X72 rubidium standard

Ed Palmer ed_palmer at sasktel.net
Fri Aug 18 00:54:50 EDT 2017

I did some more work on the HP printer cable that uses this connector.  
Here's what I found:

1.  Pin 25 on the X72 connector is unconnected.
2.  The connector is IDC.  It's possible to open it up and add the extra 
lead, but like all IDC connectors, it's rather fragile.
3.  Of the 25 leads in the cable, 10 aren't connected through. However, 
the disconnect is at the DB-25 end.  All 25 leads are wired into the X72 
4.  HP used both JST and Molex connectors.  From the pictures I've 
found, I can't tell if the Molex connectors can be opened.
5.  The connector appears to be model DMX as shown here:
It looks like you have to order all the pieces seperately (?).

JST Connector:  http://www.ebay.com/itm/182682094117 .  Note the angled 
corners near the cable.
Molex Connector:  www.ebay.com/itm/182474574277 .  Note the corners are 
closer to square than on the JST connector.

The ideal result would be to find a source of new,unused connectors, but 
these printer cables appear to be an alternative.


On 2017-08-15 10:00 AM, Christoph Kopetzky <ck at cksd.de> wrote:
> Dear all time-nuts list members,
> I am looking without any success for some Molex plugs (52660-2651) to
> connect to my X72 time standard.
> Molex told me that these connectors are obolete since 2010.
> I made some recherches at the Molex competitors but all told me that
> they do not have 1mm pitch connectors in
> their program.
> Is there anybody who can help me getting some of these connectors?
> That would be very kind and you will set me happy again...
> Best Regards
> Chris

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