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Cheap triax connector ?
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michaeliv:
Hello,

I'm looking for a triax connector for the output of a Keithley 220.
The female end ( the one I want to plug into ) looks like this: http://i.ebayimg.com/images/g/OBMAAOSwstxVNT-6/s-l1600.jpg
Picture is attached of what I want to purchase.
The cheapest I can find on eBay is $40 which seems excessive considering a similar coax connector is under $1.
Am I searching for the wrong name or is this expected pricing ?

Best!
pmcouto:
You’re doing nothing wrong – Triax connectors are *really* expensive!

Sometimes there are good deals on eBay.
Keep searching and good luck.

Be careful:
There are 2 lug and 3 lug triax connectors. Be sure to pick the right one!
(linked picture shows a 3 lug connector)

michaeliv:
Out of curiosity do they use rare/expensive materials, or are they difficult to manufacture, or there is little demand for them ? What's the reason behind the pricing ?
Hendry Born:
Please check : http://www.pomonaelectronics.com/pdf/d_ai_5218_2_03.pdf
pmcouto:
Michaeliv,

As you can see in the Pomona 5218 assembly instructions, these connectors have a lot of small precision machined parts that are not cheap to make.

Also, demand for triax connectors is low and there aren’t many manufacturers producing them (competition is very low).

Last but not least, triax connectors are mainly used in professional high-end laboratory instruments and video (broadcast grade) equipment. Compared to equipment price, triax connectors price is insignificant…
Additionally, companies using this kind of equipment can easily afford high-priced accessories such as cables and connectors, so there’s no real “pressure” on the manufacturers to lower the prices.

Now, you probably have a better idea of the reasons behind the pricing.  :)
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