Author Topic: EMC probe use  (Read 1831 times)

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Offline GrandchuckTopic starter

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EMC probe use
« on: March 06, 2023, 04:49:29 pm »
These are inexpensive but seem useful:  https://www.ebay.com/itm/334526399735
The picture below shows them applied to a power module.  The module conditions:
Input 8 vdc @ 0.36A
Output 12 vdc @ 0.2A
E probe channel 1
H probe channel 2

Seems that using EMC probes might also be useful when designing and/or troubleshooting.  Does anybody here do that?
 

Offline nctnico

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Re: EMC probe use
« Reply #1 on: March 06, 2023, 09:47:38 pm »
These kind of probes are useful indeed to find sources of certain frequency bands on a PCB. They should be in everyone's toolbox who is dealing with EMC problems.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline pdenisowski

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Re: EMC probe use
« Reply #2 on: March 06, 2023, 11:07:12 pm »
Seems that using EMC probes might also be useful when designing and/or troubleshooting.  Does anybody here do that?

Yes :)  I actually made an introductory video on the topic

Test and Measurement Fundamentals video series on the Rohde & Schwarz YouTube channel:  https://www.youtube.com/playlist?list=PLKxVoO5jUTlvsVtDcqrVn0ybqBVlLj2z8
 
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Offline pope

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Re: EMC probe use
« Reply #3 on: March 07, 2023, 08:59:50 am »
These seem to be out of stock everywhere (ebay, amazon, aliexpress).

Do you have any other source that can be purchased from?
 

Offline oddbits

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Re: EMC probe use
« Reply #4 on: March 07, 2023, 10:31:21 am »
Loads on ebay china sellers , for as little as £9 with free postage , just ordered a set ..

Hope links are ok ?.
« Last Edit: March 07, 2023, 10:33:53 am by oddbits »
 

Offline Xandinator

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Re: EMC probe use
« Reply #5 on: March 21, 2023, 02:05:55 am »
If you want to go cheap, you can even build them yourself, Dave put up a video:
 

Offline jonpaul

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Re: EMC probe use
« Reply #6 on: March 22, 2023, 01:07:26 pm »
zero cost probe

1m RG174/U, wind 10t in 10..25 mm dia coil.

Terminate centers  to BNC conn
Shield is connected at one end only to BNC rtn

Finished with insulation dip, tape or similar

Jon
The Internet Dinosaur..
passionate about analog electronics since 1950s
 

Offline GrandchuckTopic starter

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Re: EMC probe use
« Reply #7 on: March 22, 2023, 04:11:09 pm »
Here is a nearly zero cost E probe.  It is shown compared to the one in the assortment that I recently bought .  It has been insulated since the photo was taken.  It outperforms the one at the top by a wide margin ... much less unwanted 60 Hz noise susceptibility.
 


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