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How much clearing for a PCB?
How much clearing for a PCB?
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Old 16th November 2019, 10:21 PM   #11
Nocturna81 is offline Nocturna81  Netherlands
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Join Date: Aug 2008
Quote:
Originally Posted by Mark Tillotson View Post
Adding insulation on the inside of the case can be useful if clearance might be iffy - but not gaffa tape(!). I've used kapton tape for this in small diecast boxes.
Isn't that a bit fragile? The kapton tape that is?

And wouldn't the tape start peeling off after some time?

Last edited by Nocturna81; 16th November 2019 at 10:24 PM.
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Old 16th November 2019, 10:29 PM   #12
rayma is offline rayma  United States
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Join Date: Apr 2011
Quote:
Originally Posted by Nocturna81 View Post
Isn't that a bit fragile? The kapton tape that is?
Yes, instead we use Nomex 410 sheet stock, which is very tough and has a high voltage rating.
It can be cut with good scissors, punched, or die cut. We punch it to clear the spacers and install it
between pcbs and the chassis. No need for adhesives, since it is captive.

Last edited by rayma; 16th November 2019 at 10:32 PM.
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Old 18th November 2019, 12:13 PM   #13
fredbloggstwo is offline fredbloggstwo  United Kingdom
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Join Date: Aug 2007
Location: Buckinghamshire, UK
I also use FR4 copper-clad board with the copper side down: use plastic spacers between it and the PCB above and between it and the chassis. The copper side can also double up as a ground screen for audio work.

Mike
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