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Author Topic: Caig DeoxIT on oscilloscope BNC connectors?  (Read 2884 times)

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Offline dave3533Topic starter

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Caig DeoxIT on oscilloscope BNC connectors?
« on: October 03, 2014, 05:24:00 pm »
Hey all, I've seen quite a few mentions of using DeoxIT on switch contacts and the like but never oscilloscope BNC connectors. Is DeoxIT safe for oscilloscope BNC connectors as far as not interfering with the input signal? I'd imagine, if anything, it could somehow change the impedance of the connector.
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Offline edavid

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Re: Caig DeoxIT on oscilloscope BNC connectors?
« Reply #1 on: October 03, 2014, 05:43:17 pm »
Quote from: dave3533 on October 03, 2014, 05:24:00 pm
Hey all, I've seen quite a few mentions of using DeoxIT on switch contacts and the like but never oscilloscope BNC connectors. Is DeoxIT safe for oscilloscope BNC connectors as far as not interfering with the input signal? I'd imagine, if anything, it could somehow change the impedance of the connector.

You don't read about it because it is rarely necessary to use contact cleaner on BNCs.  When you mate the connector, it has a strong wiping action.

But, if you did need to clean one, DeoxIt would be fine.

Impedance is determined by connector geometry, not an insignificant residue of contact cleaner.

(BTW, if you see a tarnished BNC, you can leave it alone... silver tarnish is conductive enough not to be a problem.  However, you won't see silver plated BNCs on test equipment.)
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Offline dave3533Topic starter

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Re: Caig DeoxIT on oscilloscope BNC connectors?
« Reply #2 on: October 03, 2014, 09:37:09 pm »
Great, thank you for the reply edavid.

I was considering using DeoxIT shield or gold as a preventative measure, but it sounds like it might not be worth it anyway.
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Offline robrenz

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Re: Caig DeoxIT on oscilloscope BNC connectors?
« Reply #3 on: October 03, 2014, 09:53:24 pm »
Quote from: dave3533 on October 03, 2014, 09:37:09 pm
Great, thank you for the reply edavid.

I was considering using DeoxIT shield or gold as a preventative measure, but it sounds like it might not be worth it anyway.

I think the gold is worthwhile, it goes on every connector/plug in my lab.
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Offline rs20

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Re: Caig DeoxIT on oscilloscope BNC connectors?
« Reply #4 on: October 04, 2014, 12:58:12 am »
If I have a nice shiny oscilloscope connector, and the only feedthru terminations I have look all tarnished and dull, can I be confident that the tarnish won't spread from the termination to the connector?
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Offline edavid

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Re: Caig DeoxIT on oscilloscope BNC connectors?
« Reply #5 on: October 04, 2014, 06:04:54 pm »
Quote from: rs20 on October 04, 2014, 12:58:12 am
If I have a nice shiny oscilloscope connector, and the only feedthru terminations I have look all tarnished and dull, can I be confident that the tarnish won't spread from the termination to the connector?

Tarnish is a chemical reaction, not a disease.


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