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    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

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 Post subject: Testing cables connectors issues need your help
Posted: Mon Sep 07, 2009 4:23 am 

Joined: Tue Nov 11, 2008 5:03 am

Posts: 16

Location: Shanghai, China

One of my cable set connector to 8753ES is magnetical, which means the SmCo can attach to it, since the connectors are made of copper, should be non-magnetical, is it means my connector is of problem? It seems the copper material fo rthi s connector is not very pure, how it effects my testing result. I use it to test isolator built with stainless steel housings.

Many thanks for your response.


glad to learn from you

 Post subject: Re: Testing cables connectors issues need your help
Posted: Fri Sep 18, 2009 4:08 pm 

Joined: Fri May 26, 2006 8:20 am

Posts: 4

The base metal for your connector is very likely steel or some alloy, not pure copper. So it might have some magnetic properties. If it hase a nickel plating, then that will also contribute to the magnetic tendency. It should not affect your testing, even on a circulator/isolator as long as it is in a connectorized housing.

The main problem with magnetized connectors is a tendency to accumulate metallic particles in the interface that can cause poor VSWR and in the case of high power measurements, PIM (passive intermods) issues.

If you are worried about magnetic connectors, find some non-magnetic in-series connector savers to use between your test cables and the DUT.


--- Chebyshev

 Post subject: Re: Testing cables connectors issues need your help
Posted: Tue Sep 22, 2009 10:21 am 

Joined: Tue Nov 11, 2008 5:03 am

Posts: 16

Location: Shanghai, China

Thanks. Appreciate!


glad to learn from you

Posted  11/12/2012

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