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Old 22nd February 2014, 12:55 AM   #1
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Default I like copper, I can't help myself

So what about this as a top plate:

2.4mm thick Copper 101 101 Copper (available in Plate, Round, Sheet, Square, Tube)

ASSUMING it is up to the job of handling the weight; any other issues with using copper as a top plate?

Thanks.
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Old 22nd February 2014, 01:01 AM   #2
kevinkr is offline kevinkr  United States
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It's a perfectly valid choice, just make sure it is thick enough to handle the weight. It's a bit hard to work because it is so soft.. Clear coat it once you have done all of the prep work and it is nicely polished, and meticulously cleaned to remove finger acids. Do several coats to assure that pin holes are not a problem in the future. Make sure not to handle the chassis plate at all after cleaning - otherwise the finger prints will magically appear under the finish a few years later. Bake and then allow to harden for a week or so before you assemble the amp.

I had a line of commercial gear with all copper chassis, and some of the chassis have held up well and others have not. Finger prints are a real problem..

Done right it will be beautiful..
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Old 22nd February 2014, 01:06 AM   #3
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Thanks Kevinkr; need to find a place locally to do the coating work to ensure it is done well as I am clumsy and clueless That's what makes doing a DIY amp so interesting for me - lol
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Old 22nd February 2014, 01:09 AM   #4
evanc is offline evanc  United States
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I have spray equipment....
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Old 22nd February 2014, 01:14 AM   #5
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Quote:
Originally Posted by evanc View Post
I have spray equipment....
Evan
Sent you a PM
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Old 22nd February 2014, 02:25 AM   #6
evanc is offline evanc  United States
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For an extra about $20.00 you can go to 1/8" thick. I would guess this to be strong enough but I am just guessing. You could also think about a layer of aluminum under the copper for strength.
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Old 22nd February 2014, 02:58 AM   #7
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Hmm, I wrote and, I thought, posted a response but it seems not to be here.

Anyway, I was concerned about the weight of the thicker stuff (it's already 4.3 pounds) and I figure I can brace it if necessary. Anyway, it's ordered so I guess we will find out, eh

A big thank you to Evan for offering some assistance on this part of my project.
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Old 22nd February 2014, 04:16 AM   #8
ade99 is offline ade99  United Kingdom
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get all your conductors nice and thin, like you would with girls!
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Old 22nd February 2014, 06:14 AM   #9
tomchr is offline tomchr  United States
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I seem to recall a couple of amps in the Tubes Picture Gallery built with what appeared to be diamond plate in copper. I don't care for the diamond plate myself, but copper - if finished correctly - can look stunning. As Kevin mentioned already, finger prints and oxidation is a real issue. I would have the plate professionally polished, sealed, and clear coated if I were you (no offense to Evan).

~Tom
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Old 22nd February 2014, 07:32 AM   #10
evanc is offline evanc  United States
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none taken
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