what others do is just buy the available Trompeter triax connector and file-off 
the host connector pins.  I went through all the trouble to get the right 
connectors and then looked at my Electrometer and saw someone had already filed 
off the extra pins leaving one.  I was a upset on many levels as I would never 
file off anything on a piece of test equipment, except may the RIGOL label.

look for an eBay seller n2cbu.  Great guy, sent me extra connectors and cable.  
The biggest challenge in making your own cables is the fit between the 
connector and cable.  There are about a dozen types of triax connectors for the 
same number of cables.

Regards,

Jerry


Jerry Hancock
[email protected]
(415) 215-3779

> On Mar 23, 2018, at 6:40 AM, Stephen Locke <[email protected]> wrote:
> 
> It looks to me like a MIL-C-49142 style connector, however I'm not sure
> what the rated voltage of that style connector is.
> 
> Either way, Trompeter sells their 370 series that are essentially threaded
> BNC-size triax connectors that conform to the 49142 spec.  I believe
> Trompeter is now absorbed into Cinch.  Maybe something like the PL375.
> Digikey has some in stock that accept various cables.  The datasheet
> drawings + calipers may be enough for you to confirm a match, or at least
> this might be a starting point for you.
> 
> http://www.jrhelec.com/assets/images/manufacturers/cinch/catalogs/catalog.pdf
> https://www.digikey.com/products/en/connectors-interconnects/coaxial-connectors-rf/437?k=pl375
> 
> 
> 
> 
> On Sat, 17 Feb 2018 at 12:32 Florian Teply <[email protected]> wrote:
> 
>> Hi David,
>> 
>> Am Sat, 17 Feb 2018 15:32:15 +0000
>> schrieb "Dr. David Kirkby" <[email protected]>:
>> 
>>> In order to use the meter, I would obviously need to be able to make
>>> connections to it.
>>> 
>>> Is there anyone here that knows what the triaxial (tri-axial?)
>>> connector in the attached pictures ? One picture is of the female on
>>> the 4339B and the other the male plug on a fixture that I don't have.
>>> 
>>> The picture of the meter is not the one I have,  since the meter is at
>>> Keysight. But it has a better picture of the triaxial connector than
>>> the meter I have.
>>> 
>>> Does anyone have a bit of trixial cable with one of these connectors
>>> on?
>>> 
>> Unfortunately, I don't know this kind of connector either.
>> I can confirm however - which probably does help a bit still - that it
>> is neither the three-lug BNC triax HP/Agilent/Keysight uses on all
>> measurement equipment capable of going down to picoamp levels I have
>> ever seen, nor  the two-lug BNC triax that Keithley uses for the same
>> purpose. To me it seems to be a threaded connector, and dimension-wise
>> should be pretty close to BNC, so TNC-style triax it might indeed be.
>> 
>> But be prepared that these are a bit pricey, the last time I bought the
>> standard three-lug BNC-style triax connectors they were about 80 Euros
>> a piece.
>> 
>> HTH,
>> Florian
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