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RF shielding box - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.

Post subject: RF shielding Posted: Thu Sep 29, 2005 2:28 am
I am looking for a RF shielding box that can shield an opamp ckt from high voltage and high RF (upto 100kw) interference.
I initially put some aluminum tape over the plastic box. It helped a little, but now it started to behave strangely.

What do u guys recommend to shield the ckt and also shield the wires going into the ckt.



Post subject: ShieldingPosted: Thu Sep 29, 2005 2:22 pm
There are several problems:
1. Do power or signals have to pass through the shielding?
2. What frequencies are you thinking about? (Magnetic shielding becomes difficult at low frequencies).
3. What is the field strength at the box? 100kW within 6 inches is different from 100 kW 100 yards away.
4. Not all opamps are equally resistant to RF.

Each of these has different implications.

Good Luck!

Posted  11/12/2012

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