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Old 11th August 2005, 04:41 AM   #1
MtBiker is offline MtBiker  United States
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Default How to hold large capacitors in place

What is the best way to securely hold large electrolytic power supply caps in place when you don't have any of those silver rings that bolt them to the bottom of the amp?
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Old 11th August 2005, 04:50 AM   #2
Stocker is offline Stocker  United States
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buy the silver rings
or make some
or use the buss bars to hold them, using insulating hardware (not reccommended)

or hot-melt glue (kidding)
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Old 11th August 2005, 07:07 AM   #3
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Parts Express sell 1 3/8" mounting brackets, and you can find other sizes at Digikey and other online stores. I highly recommend you use them, as a large capacitor coming adrift can cost way more than you save by hot-gluing the thing. I was a repair tech before getting becoming an engineer - you should see the damage a loose cap can cause. It's not worth the trouble to futz around if you can get the real thing by return post.

http://www.surplussales.com/Capacitors/capclmp.html


Francois.
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Old 11th August 2005, 07:45 AM   #4
blr-amp is offline blr-amp  Germany
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Question capacitor mounting

I think about mounting large (4"height, 2"diam) caps to a pcb using its screw terminals. I don't know whether the screw terminals are strong enough. What do you think?
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Old 11th August 2005, 09:30 AM   #5
Gasho is offline Gasho  Croatia
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Cap should be holding PCB.
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Old 11th August 2005, 09:43 AM   #6
owen is offline owen  United Kingdom
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Plastic plumbing pipe clips that screw to the wall.

They come in a wide range of sizes from 1/2" upwards...

Owen
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Old 11th August 2005, 09:49 AM   #7
maf_au is offline maf_au  Australia
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I was thinking about some of these:

http://www.altronics.com.au/index.as...=item&id=H4120

(they're nylon cable tie mounts with adhesive/screw points)

and some decent HD Cable ties to suit...

The standard mounting hardware is not always convenient.

Michael
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Old 12th August 2005, 04:17 AM   #8
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Hot glue never holds, I've even tried cleaning the spots with acetone.

If you don't have the metal clamp rings, make some! If I need to strap caps flat to a chassis I just cut a strip, bend it around the cap and bend a tab on the end (after cutting to proper length), drill for the screw and tighten it down.
With some fancier tin-snip work you can cut wings on it to mount the cap vertically through a hole, recreating commercial items.

Tim
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Old 12th August 2005, 04:21 AM   #9
MtBiker is offline MtBiker  United States
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Aluminum flashing. I just happen to have some, and I think that might be just the material for creating the rings myself. It may prove too soft, although maybe I could double up the thickness. Worth a shot anyway...
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Old 12th August 2005, 04:39 AM   #10
SY is offline SY  United States
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Don't laugh, I've had excellent luck with Liquid Nails or similar construction adhesives. It looks unbelievably awful, but it holds tight for years and even provides a modicum of damping.
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