What type of Triax connector is this?  - Page 1
Forum section: electronics / testgear

author: Eth7an
author_rank: Contributor
timestamp: August 20, 2019, 05:41:58 pm
content: It's like a bnc, but with 3 nubs instead of two... I can't connect a bnc to it because the little pins are every 120 degrees instead of 180.

author: Gyro
author_rank: Super Contributor
timestamp: August 20, 2019, 05:50:48 pm
content: It's a Triax connector - the cable has two screens, one to the outer shield as normal and one connecting to the gold ring.Depending on exactly which one, your wallet is probably in for a shock.You need to post the manufacturer of the equipment to get a precise answer - there are several, used by Keithley , HP etc.P.S. Stick a "(Triax)" on the end of your thread title so that the Metrology guys notice it.

author: Eth7an
author_rank: Contributor
timestamp: August 20, 2019, 06:01:29 pm
content: Thanks a lot. It's from an hp frequency synthesizer.

author: Gyro
author_rank: Super Contributor
timestamp: August 20, 2019, 06:22:18 pm
content: Assuming the connectors didn't change in the transitions from HP > Agilent > Keysight, there are a number of Keysight triax leads to be seen on ebay.Someone with more specific knowledge will be along soon though.

author: VK5RC
author_rank: Unknown
timestamp: August 21, 2019, 02:37:12 am
content: A common term is '3 lug triax', the connectors can be crazy expensive, also search for 'trompeter' - a company who makes quite a few of these connectors. Quite tricky to join connector to cable (some good yourubes around) but the cable is relatively cheap. Also comes in '2 lug' form as well!

author: thermistor-guy
author_rank: Frequent Contributor
timestamp: August 21, 2019, 04:43:16 am
content: Quote from: VK5RC on August 21, 2019, 02:37:12 amThere is a Trompeter catalog on Digi-Key:http://www.digikey.com.au/Web%20Export/Supplier%20Content/trompeter-1097/pdf/trompeter-patching-products-rf-connectors-cable-assemblies.pdf?redirected=1Also check out SV Microwave. They helped me in the past when I needed a second source for a Trompeter (triax) part:https://www.svmicrowave.com/rf-series/triax

author: woodchips
author_rank: Frequent Contributor
timestamp: August 21, 2019, 10:35:00 am
content: There seems to be two standards for Triax connectors, either 2 pins or 3 pins, I have seen both.How many did you want, sure I have got some, somewhere, never used them! They were used on aircraft fuel tank sensors, also the smaller BNC type connector, can't remember what it is called, used on Tek 7T11 timebase.

author: Eth7an
author_rank: Contributor
timestamp: August 21, 2019, 11:11:30 am
content: Hey, if you have them and don't want them, I do! I'm not sure it's worth paying for shipping though, but thanks a lot anyway.

author: macboy
author_rank: Super Contributor
timestamp: August 21, 2019, 06:08:01 pm
content: Quote from: VK5RC on August 21, 2019, 02:37:12 amAnother term to search for is "TRB connector". Technically, triax (triaxial) refers to the cable, not the connector, and Trompeter is a brand name, like Kleenex or Jell-O. You might also find more-or-less compatible connectors searching for "Twinax".These connectors are also available in 3-lug with various combinations of angles other than 120 degrees between lugs. That is used to prevent incorrect connections in mission-critical situations.